Technical Catalogue

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HYDROPNEUMATIC STORAGE TANKS

EXPANSION VESSELS

INERTIA STORAGE TANKS FOR REFRIGERATION

SOLAR ENERGY

WHAT IS THE 97/23/CE?

HOW TO INSTALL AN HYDROPNEUMATIC TANK?

THE MAINTAENANCE OF AN HYDROPNEUMATIC TANK?

HOW TO INSTALL AN EXPANSION TANK?

THE MAINTENANCE OF AN EXPANSION TANK?

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Hydropneumatic storage tanks with replaceable bladder

DESCRIPTION

Welded steel tanks manufactured according to the European Directory 97/23/CE about pressure units, produced with two inlaid bottoms and a metal tip of curved sheet joined through welding cords and produced in accordance with the authorized process and staff, fit for resisting loosely the operating pressure they have been designed for. Several holes have been provided at the bottoms for the assembly and fixation of the bladder through a cover tap screwed on the top and a threaded coupling in the lower part according to the DIN-259 (ask for models).

The replaceable bladder completely impermeable is made of flexible synthetic rubber in one piece keeping the permanent insulation of water from the air and excluding in this way any possibility of rust of the inner metal surface of the tank or the air dilution in the water.

The bladder made with a view to the physical and mechanic characteristics according to the Regulation EN 13.831, fulfils satisfactorily all the legal requirements in force concerning the food hygiene subject. The tank is provided with a valve duly protected for the air- chamber pressure regulation.

The watertightness and the resistance of the tanks are checked at a pressure 1,5 times over the maximal working pressure. Final application of epoxy kild- dried red painting on a phosphate surface. The AMR are forwarded at a 1,5 BAR pressure. The maximal working temperature is 100ºC.

 

APPLICATION

The Hydropneumatic tanks are designed to be used in Installations for drinking water supply as well as for collecting water in wells, tanks and springs, being a part of the pressure group in order to guarantee the optimal water supply to the housings, properties, crops, etc. In addition to keep a water reserve under pressure, the Hydropneumatic tanks allow a longer duration of the pumping unit due to the remarkable reduction of the number of the pump starting-stopping operations as well as to an important energy saving.

One standard Installation of an Hydropneumatic storage tank could be the following:



1 Submersible Electro pump

2 Clamp flange

3 Switchboard

4 Isolating switch line

5 Minimum Level drills

6 Manometer

7 Check of backwater valve

8 Pressure- regulating valve

9 Pressure stopper gauge

10 Pressure storage Tank with bladder

Hs Static level

Hd Dynamic level

P Well depth


OPERATION

The drinking water collected from the mains, one tank etc., is driven to the storage tank through the pumping unit. As the water goes into the tank, it is stored inside the bladder or membrane which separates hermetically the air and the water-chamber. The entry of the water into the tank, means a reduction of the Initial air volume contained into the tank and a pressure increase consequently .

When the maximum pressure required has been reached ( stopping pump pressure), the stopping pressure gauge switches off the current and the water flow between the pump and the tank is cut short. The energy stored through the air contained in the tank will drive the water stored into the bladder to the consume points according to the needs of the users. As the water flows and the bladder empties, the air pressure decreases till reaching the minimum fixed pressure ( starting pressure of the pump) and then the water feed flow is restored from the pumping unit to the tank.

This same cycle is carried out automatically as often as the minimum and maximum pressures are reached.

 

 

MAINTENACE

The maintenance must be carried out exclusively by authorized staff.

Once installed, the storage tank works automatically without causing any problem that is why there is hardly need of maintenance. As Maintenance rule, it is necessary to check there is pressurized air inside the tank every 6 months.

We must make sure likewise of being enough water inside the tank to cover the coupling in such a way that the water uses a back pressure which protects the bladder from the extrusion. The dimensions decided for the design of the bladder are adequate for the membrane to occupy the total volume of the vessel without being damaged in case there was a loss of air.

In case of being necessary, the storage tank offers the chance to replace the bladder easily. The Installation where the Hydropneumatic is placed will have to preview the installation of the security system which limits the pressure and also guarantees it does not exceed the highest limit of the design.

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Stainless steel Storage Tankswith replaceable bladder

DESCRIPTION

Welded steel tanks manufactured In accordance with the European Directory 97/23/CE about pressure units and produced with two inlaid stainless steal bottoms and a metal tip of curved stainless steel plate, joined through welding cords following the procedures and with the authorized staff. They are produced to resist highly the working pressure they have been designed for.

Some holes have been provided in one of the bottoms for fitting- up and fixing the bladder through a screwed up stainless steel cover on the lower part.

The completely impermeable replaceable bladder is made of one piece of flexible synthetic rubber designed able to resist the permanent water and air Insulation.

The bladder is manufactured according to the physical and mechanical characteristics In accordance with the Norm EN13831 and observing all legal requirements In force concerning food safety regulations. The tank Is provided with a duly protected valve for the right pressure regulation of the air chamber.

The watertightness and resistance of the tanks are tested at a pressure 1,5 times above the maximal working pressure.

They are sent from the factory at 1,5 Bar pressure.

The maximal working temperature is 100ºC.

 

APPLICATIONS

The Hydropneumatic stainless steel storage tanks are designed to be used in the installation for collecting water wells, water tanks or springs taking part of a pressure unit In order to guarantee an optimal water supply to housing, properties, crops, etc… The Hydropneumatic storage tanks apart from keeping an under pressure water reserve, they allow a longer- lasting of the pumping unit due to the noticeably reduction of the number of starting and stopping operations of the pump as well as an Important energy saving.

 

OPERATION

The drinking water collected from the system, a tank, etc..., is driven to the tank by the pumping unit. As the water goes into the tank it is stored inside the bladder or membrane which separates hermetically the air and water chambers. The entrance of water Into the tank means a reduction of the Initial captive air volume in the deposit and consequently a pressure/ energy Increase. When the maximum pressure required is reached ( stopping pressure of the pump), the stopping pressure gauge of the pump switches off the current and the water flow between the pump and the tank Is cut off.

The air pressure decreases under request till reaching the minimum pressure fixed by the stopping pressure gauge ( starting pressure of the pump). At this moment, the pump starts till reaching again the maximum pressure required ( stopping pressure of the pump) The energy stored in the contained air will drive the water contained inside the bladder to the consumption areas according to the needs of the users.

As the water flows the bladder empties and the air pressure decreases till reaching the minimum pressure required ( starting pressure of the pump). At this moment the water feed current is restored again from the pumping unit of the tank.

This cycle Is carried out automatically as often as the maximum and minimum pressures have been reached.

 

MAINTENANCE

The maintenance must be done exclusively by authorized staff. Once the tank is set up, It works automatically without causing any problem. That Is why there Is hardly need of maintenance.

As a maintenance rule, it is necessary to check the stock of pressurized air inside the tank every six months. We will also have to make sure that there is enough water inside the tank to cover the inner coupling in such way that this water presses for producing a contra- pressure in order to preserve the bladder against the extrusion.

The right dimensions of the bladder have been defined to let the membrane fill the total volume of the vessel without suffering any damage in case of being an air loss.

The bladder can be easily replaced in case of being necessary. The Installation where the Hydropneumatic tank Is placed will have had previewed a security system to limit the pressure and to guarantee It does not to exceed the highest limit of the design.

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Stainless steel and Galvanized Hydropneumatic Storage Tanks without bladder

DESCRIPTION

Welded steel tanks manufactured In accordance with the European Directory 97/23/CE about pressure units and produced with two inlaid bottoms and a metal tip of curved stainless steel plate, joined through welding cords following the procedures and with the authorized staff. Inside and outside hot-galvanized or Stainless steel tanks with inlets for all accessories and all the requirements for a perfect Installation. The watertightness and resistance of the tanks are tested at a pressure 1,5 times above the maximal working pressure. The maximal working temperature is 60ºC for Galvanized tanks and 100ºC for Stainless steel tanks.

 

APPLICATION

The Stainless steel or Galvanized Hydropneumatic Tanks without bladder are designed to work in the installations for drinking water supply taking part of a pressure unit, guaranteeing the minimum pressure required for water supply to the user.

Apart from collecting water under pressure to be supplied, they allow a longer- lasting of the pumping unit due to the noticeably reduction of the number of starting and stopping operations of the pump as well as an Important energy saving.

 

OPERATION

The drinking water collected from the system, a tank, etc..., is driven to the tank by the pumping unit.

As the water goes Into the tank It Is stored Inside. The entrance of water Into the tank means a reduction of the Initial captive air volume in the deposit and consequently a pressure/ energy Increase.

When the maximum pressure required is reached ( stopping pressure of the pump), the stopping pressure gauge of the pump switches off the current and the water flow between the pump and the tank Is cut off.

The energy stored In the captive air of the tank will lead the contained water Inside the bladder to the consumptions points. The air pressure decreases under request till reaching the minimum pressure fixed by the stopping pressure gauge ( starting pressure of the pump). At this moment, the pump starts till reaching again the maximum pressure required ( stopping pressure of the pump).

As the air and the water are in touch , the pressure variations are compensated by the starting of the compressor through the injectors. The tank can have a level gauge, to check the water level contained inside the tank.

 

MAINTENANCE

The maintenance must be done exclusively by authorized staff.

Once the tank is set up, It works automatically without causing any problem. That Is why there Is hardly need of maintenance.

CAs a maintenance rule, it is necessary to check and clean the different accessories of the tank every six month ( Injectors, level gauges, etc…).

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Water Hammer Shock Absorber Hydropneumatic Tanks

DESCRIPTION

Pressure tank made of welded steel plate and manufactured according to the European Directory 97/28/CE for Pressure Units. They have a replaceable bladder inside as receptacle of water to avoid It to be in contact with the steel.

The gas Is housed Inside the chamber located between the bladder ant the tank.

There is an anti- extrusion grid of which the loss pressure has been previously defined. This grid Is situated in the intake connection with the pipe to protect the bladder.

The manhole is located in the centre of the bottom In horizontal models and In the centre of the shell belt In vertical models. Inner protection with priming coat . Outside protection with priming coat and red colour enamel finish ( RAL-3.013.)

 

APPLICATION

This tanks must be installed in all water pipes to reduce Into permissible values, the excess pressure and pressure drop waves expanded through the pipes, every time there is a sudden modification of the volume due to the pump stopping or starting or to the valve closing.

 

OPERATION

When the unit Is In continuous operation the water flows through the pipe and the C and D pressures are balanced.

Every time the pump stops there is a pressure drop in the pipes. The D pressure falls and the C pressure pushes automatically the water contained in the bladder to the pipe making possible to control the minimal pressure avoiding it to fall to dangerous levels for the piping, joints, etc... That Is to say, It eliminates the fall and the cavitation In case there was.

When the liquid column goes down, the return shock wave causes an excess pressure in the pipe which is reduced by the pressurized gas absorbing effect contained in the water hammer shock absorber, as soon as the as the water goes Into the tank. This excess of pressure Is limited till the permissible value previously defined for the calculation of the water hammer shock absorber.

Therefore, the installation of a water hammer shock absorber offers the following advantages:

- Longer Useful live of the Installations.

- Installation costs reduction. Preset pressure fall of the pipe, valves and accessories.

- Guaranteed protection and safety.

PUTTING INTO SERVICE- MAINTENANCE

The water hammer shock absorbers are served with an Initial pre-inflating of 0,3 bar. These are the necessary steps to follow for the Installation of this equipment:

1. To check the right installation of the connection between the pipe and the water hammer shock absorber and close the valve situated between them.

2. Fill the tank with air through the valve provided for It.

Once the tank Is provided with the level gauge test device, we will proceed as It follows:

- Put a hose of 10 or 15 mm ( inner diameter) in the detachable part ( male) of the quick plug next to the pressure gauge.

- Open valve ( 1) and close valve (2).

- With the support of a portable compressor or a cylinder, introduce air till the manometer exceeds slightly the rated charge pressure.

- Fit the pressure to Its right level taking opening and closing ball valve operations (1).

3. Open the valve which Insulates the water hammer shock absorber from the unit. If the rest of the equipment has already water at that moment, the static pressure places the water into the water hammer shock absorber.

4. Open all valves of the level gauge unit and start the pump. Leave the conduction In continuous operation regime. Mark with a line the water level, point (A).

 

WATER HAMMER SHOCK ABSORVER CALCULATION

The most suitable volume of the water hammer shock absorber is calculated according to the characteristics of the line and to the maximal and minimum rated pressure for the conduction.

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Expansion Vessels

DESCRIPTION

Tanks of welded steel plate and manufactured according to the European Directory 97/28/CE for Pressure Units, made of two inlaid bottoms and a metal tip of curved stainless steel plate, joined through welding cords following the procedures and with the authorized staff.

The CMF has Inside a fixed membrane made of synthetic rubber, very flexible and temperature high resistant. Almost unlimited duration because It does not suffer the dilatation effects according to the physical and mechanical characteristics of the Norm EN-13831.

The design of the membrane and its dimension are calculated to fill totally the internal surface of the tank avoiding a possible fissure in case there was a loss of air around.

The tank Is provided with a duly protected valve for the right pressure regulation of the air chamber in one of the bottoms. Air pre- charge 1,5 Bar.

The watertightness and resistance of the tanks are tested at a pressure 1,5 times above the maximal working pressure.

Final application over a phosphate surface of epoxy red finish printing coat.

Operating range of temperature –10ºC + 100ºC.

 

APPLICATION

The expansion vessels CMF are designed for heating installations in close circuit which allows to absorb the volume rise caused by the rise In temperature of the heating fluid.

There can be a water heating in a heating installation. Water dilates increasing this way its volume which can cause a dangerous situation for the installation. The expansion vessels are defined to balance this increase of water volume avoiding the circuit pressure to exceed the nominal pressure of Its components.

 

OPERATION

There Is a full air chamber under pressure between the bladder and the tank plate. When the bladder is filled with water, the air is pushed and It Is compressed . Once the effort stops, the air pushes the bladder till it gets the original pressure back.

At the moment of setting up the vessel CMF the following points must be borne in mind:

Before proceeding to the installation make sure that the expansion vessel volume has been calculated by the authorized staff.

The expansion vessel will be placed preferably in the return piping In order to avoid the water temperature can damage the membrane. The expansion vessel will be compulsory assembled between the boiler and the mixing valve in the return piping to the boiler preferably.

Apart from the expansion vessel, It is compulsory to set up a safety valve and a manometer for the Installations In heating close circuit. The safety valve will be perfectly rated according to the boiler pressure and the installation and it will never exceed the maximal pressure of the vessel ( with the manometer incorporated).

The closed expansion vessel will be Installed in such a way that airbeds cannot be produced.

Avoid radiations near the expansion vessel to protect the bladder against the possible rises in temperature.

No valve will be allowed to be closed and insulate the own circuit of the expansion vessel.

Fit the Inflating pressure of the vessel at the arrival pressure ( network pressure), that is to say, Inflating P = arrival P + 0,2 (Bar).

MAINTENANCE

The maintenance must be done exclusively by authorized staff.

Check through the inflating valve that the air chamber pressure stays at the right levels at least once every six months. Be careful of checking the contrast of values at the same temperature.

Never disassemble the vessel without having depressurized the installation previously.

The standard pressure of a CMF vessel Is 1,5 bar. However, this value must be regulated and fitted according to the function of the installation in which the vessel is installed.

When the installation is filling with water make sure that the pressure shown in the manometer exceeds slightly the static pressure of the Installation. Keep the Installation at the maximal working temperature during half a day, eliminate the air of the system and replace it by water. Protect the vessel from the Inclemency of the weather.

To prevent the expansion vessels from the Inner rust it is advisable to drain the closed circuit periodically.

The expansion vessels with fixed membrane lack inner treatment. They are not fitted with protection against rust, given that they are designed for the exclusive use In closed Atmospheric circuits with non chemically abrasive fluids.

The possible outside air Intake inside the installation must be minimized during maintenance operations.

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Expansion vessels with compressor and replaceable bladder

DESCRIPTION

The expansion vessels with compressor AMR-C-A are made of quality welded steel according to the standardized procedures and completely automatic In accordance with the norm In force.

Inside the tank there Is a replaceable bladder made of flexible synthetic rubber according to the Norm EN13831designed to resist high temperatures and to occupy the whole Inner surface of the tank without being broken. The vessel, as a complement, has an electronic unit of control and operation , a compressor and all the necessary elements to check the control of the pressure and water volume contained In the vessel. The values are shown In the digital device.

External protection over a phosphate surface with a printing coat and red colour finish.

 

APLICATION

The automatic expansion vessels AMR-C-A are designed to allow the check and control of pressure and of the water components in the installations with thermal systems in closed circuit.

 

OPERATION

The increase of water volume caused by the rise in the temperature is absorbed by the bladder. Meanwhile the contained air between the bladder and the tank is released by draining. Due to this reduction of the airbed, the tank can absorb an expansion volume equivalent to its total volume, keeping the pressure of the installation adjusted within a tolerance of 0,2 bar pressure.

When the drop of the water temperature causes a decrease of the volume and a fall of pressure, the compressor undertakes to bring the necessary air to the tank In order to allow the bladder to replace the necessary water for the Installation.

The vessel with compressor guarantees a constant pressure allowing an easy regulation and control of the installation.

 

  1. Manhole ø 400 for volumes equal to 2000 litres or higher.
  2. Safety valve R 1/4” ( air side) 10 bar.
  3. Blowoff valve ( air side).
  4. Heating network -system connection and flange with flexible union.
  5. Bladder fastening.
  6. Bladder according to the EN-13.831.
  7. Welded steel tank.
  8. Water content gage shoe.
  9. Operating and control unit.
  10. Dry compressor with no need of lubrication. Silent.
  11. Mark C.E. Manufactured in accordance with PED 97/23/CE.
  12. Draining to empty the contained air inside the bladder ( water side).
  13. Automatic filling system ( optional).

 

MAINTENANCE

The automatic control and operation unit Is provided assembled in the vessel and perfectly adjusted and prepared to start working.

Its operation is automatic and it does not need maintenance.

The steps to take in order to follow the starting without having special technical knowledge are defined In the Instruction and operating book.

 

ADVANTAGES OF THE EXPANSION VESSEL WITH COMPRESSOR

• It allows an easy control and regulation of the installation.

• It guarantees a constant pressure of the installation. Maximal tolerance + 0,2 bar.

• It is designed to make use of most of the total useful volume of the tank which makes possible an important saving In space.

• Permanent reading on a digital screen of the installation pressure and the heating water content inside the tank.

• The replaceable bladder is designed to occupy the total inner surface of the tank. The water Is placed Inside the bladder.

• Its automatic operation does not need maintenance.

• Its automatic operation does not need maintenance. • The assembly is simple and there is no need either of qualified staff or special connections in the circuit. It Is Installed without any kind of anchorage to the ground.

• There is no need of baseboards or clamps for its installation.

• Operation and control box ready to operate. There Is only need of a Standard current tap and ground connection.

• Three- phase electric connection 220/380V

• Authorized equipment according to the European Directive 97/23/CE.

• Automatic filling system. Driven by electric signs obtained through the water volume gage. Optional: Automatic filling system.

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Expansion vessels with replaceable bladder and compressor

IT IS NECESSARY TO GIVE THE GEOMETRIC HEIGHT INFORMATION WHEN PLACING THE ORDER IN ORDER TO PROGRAMME THE CONTROL UNIT. FROM 60 METRES HIGHG ASK FOR PRICE.

1. Manhole ø 400 for volumes equal to 2000 litres or higher.

2. Safety valve R 1/4” ( air side) 10 bar.

3. Blowoff valve ( air side).

4. Heating network -system connection and flange with flexible union.

5. Bladder fastening.

6. Bladder according to the EN-13.831.

7. Welded steel tank.

8. Water content gage shoe.

9. Operating and control unit.

10. Dry compressor with no need of lubrication. Silent.

11. Mark C.E. Manufactured in accordance with PED 97/23/CE.

12. Draining to empty the contained air inside the bladder ( water side).

13 Automatic filling system ( optional).

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Expansion vessel for Hot Sanitary water Installations

DESCRIPTION

Tanks made of steel produced with two inlaid bottoms joined through welding cords manufactured following the automatic procedures and with the authorized staff according to the European Directive 97/23/CE for pressure units.

Two holes have been provided in the bottoms for fitting- up and fixing the bladder and coupling the pass of water.

The parts In contact with water are made of stainless steel AISI 304. The food-grade replaceable and completely impermeable membrane, made in accordance with the physic and mechanics characteristics defined in the Norm EN 13831, allows to keep constantly Insolated the water and the air, avoiding any possibility of rusting of the metal Inner surface of the storage tank.

The inflating valve is duly protected for the pressure regulation of the air chamber. Air Pre- charge at 3 Bar.

Final application over a phosphate surface of white colour painting of 40 microns thickness minimum.

The maximum working temperature Is 100º C.

 

APLICATION

The expansion vessels CMR are designed to be used in installations to turn cold drinking water into drinking hot water. They allow to absorb the rise in the volume caused by the water heating, avoiding the pressure of the circuit to exceed the nominal pressure of its components.

The use of this kind of vessel has the following advantages:

- Minimize the water hammer shock. When the mixer tap cocks are suddenly closed, water hammer shocks are produced inside the installation and they can occasion high sudden pressures. This makes noises inside the pipes and produces an important mechanic wear of the different components of the Installation. Those disadvantages are avoided installing an expansion vessel.

- Lighten the safety unit ( there are rarely leaks of water ). Save water. Electric energy saving.

 

OPERATION

As soon as the water expands compressing the airbed, it sinks in the vessel increasing the pressure till reaching the value defined in the calculation. When the water gets cold, the captive air expands and push the water to return to the circuit till the installation gets the original pressure. When an expansion vessel for Sanitary hot water installation is going to be set, the following terms must be borne In mind:

Before proceeding to the Installation, make sure that the expansion vessel volume has been calculated by the authorized staff. The vessel Is compulsory set up on an inlet pipe for cold water, being placed between the safety unit and the hot water producer. There cannot be any device which can close the connection between the expansion vessel and the hot water producer.

Avoid radiations near the expansion vessel to protect the bladder from the possible excess temperatures.

Control of the cold water arrival pressure. If It exceeds 5,25 Bar, set up a pressure- reducing valve.

 

MAINTENANCE

The maintenance must be done exclusively by authorized staff.

The standard pressure is 3 bar. However, this value must be adjusted and fitted according to the function of the installation in which the vessel is installed.

Check the Inflating value at least every six months. The inspection of this value must be carried out with the installation cold and depressurized. Never disassemble the vessel without having depressurized the installation previously .

When the Installation is filling with water, make sure that the pressure shown in the manometer exceeds slightly the static pressure of the installation. Keep the Installation at the maximal working temperature during half a day, eliminate the air of the system and replace it by water.

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Inertia Storage tanks for Refrigeration Installations

DESCRIPTION

Inertia Tanks AR-A, are made of two inlaid bottoms and a curved metal sheet ring joined through welding cords following the procedures and with the authorized staff according to the Directive 97/23/CE for pressure units.

Designed for the storage of refrigerated water in connection with the conditioning installation with the aim of Increasing the thermic volume. Vertical tanks made of black steel series AR-A, for volumes from 100 to 5000 litres included.

They have different connections ( ask for models) as shown in the attached charts.

They are provided with a thermic insulation by direct injection of rigid polyurethane foam:

- 100 AR-A: 30 mm thick, CFC - free.

- 200-500 AR-A: 50 mm thick, CFC- free.

- 750-1000 AR-A: 75 mm thick, CFC-free.

- 1500-5000 AR-A: 80 mm thick, CFC- free.

Finishing coat with detachable cover:

- 100-1000 AR-A: Grey coloured jacket.

- 11500-5000 AR-A: Skay orange coloured jacket

Maximal working pressure 6 bar.

The standard accumulation temperature is between 7ºC and 12ºC (cold ) and between 0ºC and 50ºC ( heat pump).

 

APLICATION

Inertia tanks AR-A specifically designed for the storage of refrigerated water for conditioned air circuits and heat pumps to guarantee a constant average temperature, reducing substantially the number of starting/ stopping operations of the cold- storage plant or boiler when there are sudden and quick variations of temperature.

 

OPERATION

Suitable for use in closed circuits of hot and cold transmission. They can never be Installed In secondary circuit for drinking water. They are essential storage tanks for the installation where it Is necessary to increase the thermic inertia of the systems like hotels and housings.

 

MAINTENANCE

Place the tanks on flat surfaces capable to bear the weight of the tank and its content.

There will be enough place for an easy access to the assembly and dismantle of the different elements in view of a possible maintenance operation.

It Is advisable to check periodically there is no occasional leaks as well as the correct operation of the safety valve for the right operation of the storage tank.

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Expansion Vessels and Storage Tanks for Solar Energy Installations

Expansion vessels for Solar Energy Installations

DESCRIPTION

Tanks made of welded steel produced with two inlaid bottoms and curved metal sheet ring joined through welding cords manufactured following the procedures and with the authorized staff according to the principles of the European Directive 97/23CE.

The fix membrane or replaceable bladder , In accordance with the model, Is made of flexible synthetic rubber according to the physical and mechanical characteristics of the Norm EN 13.831. The bladder is fixed through a screwed cap on the top side of the vessel and through a threaded coupling on the lower side according to the DIN 259, in the tanks with replaceable bladder Bearing In mind that high temperatures can be produced In the solar panels, the elastomer used in the bladder can resist picks of temperature of 130ºC for one hour maximum.

The tanks are provided with a duly protected valve for the pressure regulation of the air chamber. They are designed to resist the overpressures of the Installation till 10 bar.

Suitable for use even with a 50% antifreeze ( ethylene-glycol resistant).

The watertightness and resistance of the tanks is checked at a pressure 1,5 times above the maximal working pressure.

Final application of kild- dried white epoxy painting on a phosphate surface of 40 microns thickness minimum.

 

APLICATION

The expansion vessels for Solar energy installations guarantee the safety operation of the solar vessel during &/ or after the watertightness of the tank.

The solar collectors reach high temperatures. The consequence is the evaporation of the solar liquid with the possibility of producing extreme high temperatures in the circuit, causing damages In the pumps, joints and In regard to the vessel, In the own bladder. That is why Industrias Ibaiondo offers a specially bladder resistant to 130º C temperature.

In contrast to the expansion vessels for heating, the solar expansion vessels, apart from adjusting the volume expansion of the heat conducting fluid, they are useful for equalizing the volume reduction in case of cooling .

In case of foreseeing that the extreme values of temperature can be exceeded, due to the kind of Installation ( when the expansion vessel is very close to the collector), look the Installation process of an Intermediate vessel ( page 54).

 

OPERATION

As a consequence of the heat conducting fluid heating which passes round the sensors and the solar circuit, this one will increase its volume and therefore the bladder will be moved to the side where the captive air Is or to the expansion chamber.

This causes an Increase of the available place for the fluid remaining constant the pressure of tank at the maximal allowed pressure level. Subsequently and as a consequence of the fluid cooling, the bladder recovers its initial condition and therefore the available place for solar liquid is reduced, remaining constant the tank pressure at the minimal acceptable pressure level.

The expansion vessel must be installed in the solar return as distant as possible from the solar collector.

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Expansion vessels for Solar Energy Installations

MAINTENANCE

The maintenance must be done exclusively by authorized staff. Check through the inflating valve that the air chamber pressure stays at the pre- Inflating levels at least once every six months. Be careful of doing it checking the values at the same temperature and with the Installation depressurized. Never disassemble the vessel without having depressurized the Installation previously.

The expansion vessels with fixed membrane lack inner treatment. They are not equipped with protection against the rust, given that they are designed for the exclusive use In closed Atmospheric circuits with non chemically abrasive fluids.

The possible outside air Intake inside the installation must be minimized during maintenance operations. The standard pressure is 2,5 bar. However, this value must be regulated and fitted according to the installation in which the vessel is set up.

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Vitrified tanks for Solar energy Installations

DESCRIPTION

Tanks made of vitrified steel, produced with two inlaid bottoms and curved metal sheet ring joined through welding cords manufactured following the procedures and with the authorized staff according to the principles of the European Directive 97/23CE for pressure vessels. They have an inner treatment which consists of a previous process of degreasing, scaling and neutralization and a subsequent 850 ºC vitrified enamel coating , according to the requirements of the norm DIN4753.

They are fitted with an external thermic Isolation consisting of a direct Injection of polyurethane rigid foam free of CFC. The outside finish is composed of a PVC jacket fitted with zipper to be easily disassembled.

On the top side of the tank there Is an ABS black cover and all the couplings are protected with trimmings and caps.

The tanks are equipped with one or two fixed coils ( ask for models).

The vitrified storage tanks or ASF are standard equipped with a magnesium anode with the right dimensions calculated to guarantee the efficient protection against rust. It Is also fitted with a charge measuring device of the anode.

Thy have cases for thermometer, solar drill and an auxiliary source. The tanks give the chance to Incorporate an electric resistance as support ( heating) equipped with a regulation and safety thermostat through a coupling of 1 1⁄4” connection ( see prices In page 63). The disposal and design of the couplings, fitted with deflectors allows a right bedding of the hot water avoiding turbulences ( anti- legionnaire’s disease).

The manhole and cleanout hole in the 200 and 300 Liters models is situated on the top side of the tanks, whereas the 500 litres model Is fitted with a side manhole.

They comply with the requirements of the CTE ( Technical Construction Code ) and RITE.

 

APLICATION

The storage vitrified tanks or ASF are designed for the storage and production of hot Sanitary water ( A.C.S) through thermic solar energy systems.

The use of this tanks consists of the production of hot Sanitary water through the interchange of energy produced in one or two fixed coils incorporated to the tank.

Provided with one or two coils, its connection with two solar collectors avoids the need for Installation a solar plate Interchanger.

 

OPERATION

The tanks with only one coil (models ASF 1) are thought for a main heat source whereas the models with two coils ( models ASF 2) are designed to be used In combined systems of solar panels and boiler as a support supply.

The coils are designed to obtain the best result of the system with the main efficiency of the thermic interchange. The magnesium anodes with limited useful life, offer a cathodic protection to the tanks. An eventual checking of the anodes conditions through the batcher is necessary.

 

MAINTENANCE

The tank will always have to be protected from the atmospheric elements and be always placed in vertical in order to allow an easy disassemble as well as the necessary maintenance operations. Once the tank Is Installed, check there is enough place to remove the anode, the electric resistance and the tank instruments In order to make easy to open the manholes or manheads In case of being necessary. We will make sure of the right dimensions of access to the place where the tank is going to be placed to make easy Its Installation without having to carry out any reforming work.

According to current guidelines, it is necessary to install a by- pass valve, a check valve and a safety valve gauged under 8 bar pressure in the cold water intake.

The right operation of the tank must be manually checked at least once a month In order to avoid possible obstructions.

It is advisable the installation of an expansion vessel Ibaiondo ( model CMR) In the outlet of the ACS ( Hot Sanitary Water Storage Tank) to prevent the tank from the pressure strokes damages avoiding the leaking through the safety valve.

Dielectric couplings will be placed in all connections to avoid the direct contact of the metals and prevent the galvanic rust.

An anti-return valve will be Installed In the recirculation pipe. Before proceeding to the hydraulic connection It Is essential to clean the feeder pipes In order to avoid metallic particles to go Into the storage tank. Drain the air of the circuits once they have been filled with water.

According to current guidelines about the Installation and the hydrostatic watertightness tests specially and In accordance with the Maintenance Rules RD 865/2003 of the 4th July about the prevention of the legionnaire’s disease.

 

Inertia tanks in close circuit for Solar energy Installations.

DESCRIPTION

Tanks made of black steel produced with two inlaid bottoms and curved metal sheet ring joined through welding cords manufactured following the procedures and with the authorized staff according to the principles of the European Directive 97/23CE for pressure vessels.

Due that they are designed for close circuits they are not fitted with anticorrosion Inner protection.

They are equipped with an outside thermic Insolation consisting of a direct polyurethane rigid foam injection free of CFC.

The outside finish consists of a Skay Grey coloured jacket RAL7035 fitted with zipper to be easily disassembled. On the top side of the tank there Is an ABS black cover and all the couplings are protected with trimmings and caps.

Maximal working pressure 6 bar.

The operating temperature Is between –10ºC +100ºC.

The placing and design of the raccords allow a right bedding of the hot water.

 

APLICATION

Storage tanks and Inertia Interstorage for Installation in Solar thermic Energy System. Specially designed to be used for centralized storage solar systems in blocks of flats and for individual systems of ACS production and as heating support, according to the CTE and RITE requirements.

Its use is for hot water storage caused by the solar collectors in a primary circuit. That is why they can never be installed in a secondary circuit of potable water.

The flexible design allows the installation of several tanks in sequence or in parallel. It Is a product very used In moderns solar systems because It offers a great efficiency and also minimizes the space needs in housings and at the same time guarantees the production of ACS ( Hot Sanitary water) free of any risk of legionnaire’s disease.

 

OPERATION

The Inertia Tank is used as heat storage for heating systems or big ACS ( Hot Sanitary Water) installations.

The heat produced by Solar Energy or a boiler is transmitted to a tank through the coil or through a plates interchanger.

This heat can be extracted through other interchanger and heat this way , the ACS ( Hot Sanitary Water) or being used for heating buildings. In case of being necessary, the tanks can be connected in sequence or in parallel according to the needs of volume or the space conditions.

The Inertia storage tanks do not contain consumption water so that the specific exigencies for the potable water for consumption are not required.

 

MAINTENANCE

The tank will always have to be protected from the atmospheric elements and be placed in vertical in order to allow an easy disassemble as well as the necessary maintenance operations. We will make sure of the right dimensions of access to the place where the tank is going to be placed to make easy Its Installation without having to carry out any reforming work.

It Is advisable to check periodically there is no occasional leaks as well as the correct operation of the safety valve for the right operation of the storage tank.

Cathodic protection and frequently maintenance operations are not required.

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Intermediate vessels for solar energy installations.

DESCRIPTION

Tanks made of steel produced with two inlaid bottoms and curved metal sheet ring joined through welding cords manufactured following the procedures an with the authorized staff according to the European Directive 97/23/CE for pressure vessels.

The Intermediate vessels in each of the bottoms are fitted with both couplings or water connections 3/4" or 1" ( ask for models).

Outside application over a phosphate surface of epoxy kild- dried white colour painting of 40 microns thickness minimum.

The stagnancy and resistance of the vessels are tested 1,5 times over the maximal working pressure.

 

APLICATION

They are used in the solar installations in combination with the expansion vessels.

The Intermediate vessel VI protects the membrane of the expansion vessel against the high and constant temperatures which surpass the set limits ( 130ºC for more than one hour). The aim of this vessel Is to decrease the temperature that a liquid proceeding from the solar collectors can reach, offering a thermic protection to the membrane of the expansion vessel.

The Guidelines VDI 6002 advises an intermediate vessel when the pipe volume between the collector an the expansion vessel is under the 50% Its capacity ( Installations In roofs and short length circuits) It Is directly Installed In the pipe, between the collector and the expansion vessel.

 

OPERATION

Operation: The cold solar fluid remains in the intermediate vessel. In case of being excessive temperatures or extreme boiling of the liquid proceeding from the collector, the fluid will be mixed with the contain of the intermediate vessel before entering the expansion vessel. The Intermediate vessel will have to be Isolated to fulfil Its purpose.

 

MAINTENANCE

The maintenance will have to be carried out exclusively by the authorized staff.

Never disassemble the vessel without having depressurized the Installation previously.

The Intermediate vessels lack Inner treatment. Therefore, they are not fitted with protection against the rust, given that they are designed for the exclusive use In closed Atmospheric circuits with non chemically abrasive fluids. The possible outside air Intake inside the installation must be minimized during maintenance operations.

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WHAT IS THE DIRECTIVE 97/23/EC?

The Pressure Equipment Directive was adopted by the European Parliament and the Council in May 1997 as the Directive 97/23/EC. This directive is part of the European Community program. Its aim is the elimination of the technical obstacles to facilitate free trade and it is formulated within what are known as New Approach Directives.

The Directive 97/23/EC is applied to equipments and assemblies with a maximum allowable pressure over 0.5 bar and in general, when the result of multiplying the maximum allowable pressure by the volume is over 50 bar * litre.
The 97/23/C Directive must be complied by the manufacturers of pressure units to be marketed within the European Economic Area (EEA). Certain types of pressure units are excluded from the scope of the Directive, such as equipment for ships and aircraft , equipment specifically designed for nuclear use, and so on. Many of them are covered by other directives.

The Pressure Equipment Directive came into force in November 1999 and as a mandatory fulfilment in May 2002, according to which the manufacturing or marketing of pressure vessels without CE marked is not allowed, complying with all the requirements of the Directive 97/23 / EC. The breach to comply with Directive 97/23/EC is considered a criminal offense.

All equipments covered by Directive 97/23/EC (PED) must comply with all essential safety requirements set out in Annex I of this law. The fulfilment of these requirements implies an approval of the procedures and staff in welded joints by an independent institution , an approval of materials used in the manufacture of equipment, etc., depending on the category of the equipment.

The equipment manufacturer must have the technical documentation of the manufacturing design, calculations, drawings, test reports and processes records which prove the conformity of the pressure equipment manufactured according to the essential safety requirements. All this technical documentation is subjected to the approval by a Notified Institution, which also audits annually the manufacturer, The manufacturer of the vessel must submit the pressure equipment to one or more of the modules of conformity assesment, which are defined according to the equipment category. To classify the product on the corresponding category it must be known :

• Type of pressure equipment.
• Fluid to contain.
• Fluid type (dangerous or not).
• Maximum allowed pressure.
• Volume in liters


Once the manufacturer has shown that the equipment complies with safety requirements and has issued a Declaration of Conformity, we proceed with the CE marking of the vessel and it can be marketed without restrictions within the Single Market area.

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HOW TO INSTALL AN HYDROPNEUMATIC TANK?

Hydropneumatic storage tanks are used in water supply installations and pressure groups of industrial or potable water. Water is stored in a bladder which fulfills the the statutory requirements on food higiene and separates hermetically the air cushion of the water. Once properly installed, the tank works automatically without presenting any problem, so maintenance is virtually nonexistent. In order to avoid breakages of the membrane by extrusion, do not pressurize the tank with values higher than 1.5 bar until it is conveniently connected to the installation.

Likewise we must ensure that the tank has enough water inside to cover the inner coupling so that the water exerts a backpressure that preserves the membrane from the extrusion. The installation where the hydropneumatic storage tank is to be placed must have foreseen the installation of a safety system which limits the pressure and guarantees that the pressure does not exceed the upper limit of design.

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HOW TO DO THE MAINTENANCE OF AN STORAGE TANK?

Maintenance should be carried out only by the authorized staff. At least once every six months check through the inflation valve that the air chamber pressure is kept in the pre inflating values, taking care to do so by contrasting the values at the same temperature , with the installation depressurized.

Never remove the vessel without having depressurized the installation first.

There can be a loss of pressure in the screw joint between the cover and the original tank because of its common operation (vibration, fatigue,...). This is rectified by a simple screws retightening.

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HOW TO INSTALL AN EXPANSION VESSEL?

Before proceeding to the installation, make sure that the expansion vessel volume has been calculated by the authorized staff.

The expansion tank will be compulsory installed between the boiler and the mixing valve, preferably in the return pipe to the boiler.

Between the boiler and the expansion vessel there should be no valve or closure device which could isolate the vessel.

Place a perfectly calibrated safety valve according to the pressure of the boiler and the installation, near the expansion vessel and do not exceed the maximum pressure of the vessel with the pressure gauge. The vessel must be installed so that the sleeve will be positioned on the top to facilitate the air purging.

When the installation is filling with water, make sure that the pressure shown in the pressure gauge, is slightly higher than the static pressure of the installation. Keep the installation at maximum operating temperature for half a day and remove air from the system, replacing it with water. In order to prevent internal corrosion in the expansion vessels, it is recommended to drain the tank periodically.

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HOW TO DO THE MAINTENANCE OF AN EXPANSION VESSEL?

Maintenance should be carried out only by the authorized staff. At least once every six months check through the inflation valve that the air chamber pressure is kept in the pre inflating values, taking care to do so by contrasting the values at the same temperature and with the installation depressurized.

Never disassemble the vessel without having depressurized the installation first.

Protect the vessel from inclement weather conditions.

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