Our Products
At QHP we design and manufacture bespoke Accumulators that are as special as your circumstances.
We have built a reputation on recognising the individuality of our customers needs and as such are willing to go to great lengths to develop bespoke products which enable them to achieve the competitive advantage that strengthens us all.
As HYDAC are our sister company we can also offer many of their products individually or as part of a package to suit customer needs / applications.
Product Portfolio
Bladder Accumulators
Standard Bladder Accumulators
We offer fully repairable Bladder type accumulators in a wide variety of sizes from 1 litre to 57 litres. We also offer protective internal and external coatings or corrosion resistant materials as required.
Our standard Bladder Accumulators are manufactured to international standards up to pressures of 690 bar (10,000 PSI) as standard (see our Design Standards section for more information). The components for this large range of Accumulators are usually carried in stock.
Bespoke units are available upon request to cope with low/high temperatures, aggressive fluids, or high flow rates, again many components will be carried in stock.
Standard bladder type hydraulic Accumulators:
- 1 to 57 Litre Nominal Capacity.
- Chrome Molybdenum Steel.
- Stainless-Steel or Carbon Steel Connections available.
- MaWP of 420 Bar & 690 Bar Standard Vessels.
- BSEN 14359 Design Standard.
- PED 2014/68/EU Certified (CE Marked).
- Non standard options are available.
- ASME VIII Division 1 with the option for U Stamp and National Board Registration.
- AS1210 Australian Pressure Vessel Standard.
- Others available on request.
Design Standards
QHP can design and manufacture to the following standards:
- BSEN 14359 (British/European Accumulator Code).
- ASME VIII Division 1 (U Code Stamp available).
- AS1210 (Australian Pressure Vessel Code).
QHP can also offer the following approvals:
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Separate Datasheets to download:
- 1 - 50 Litre Oil & Gas Bladder Accumulators 420 Bar
- 10 - 50 Litre Oil & Gas Bladder Accumulators 690 Bar
- 1 - 50 Litre Industrial Bladder Accumulators 345/420 Bar
- 10- 57 Litre (2.5-15 USG) Bladder Accumulators 3000/4000 PSI ASME VIII Division 1 'U' Stamp
- 10- 57 Litre (2.5-15 USG) Bladder Accumulators 6666 PSI ASME VIII Division 1 'U' Stamp
- 10- 57 Litre (2.5-15 USG) Bladder Accumulators 10,000 PSI ASME VIII Division 1 'U' Stamp
Fabricated Bladder Accumulators
QHP provide Stainless-Steel Fabricated Bladder Accumulators in a range of standard sizes from 1 to 50 litres, in a range of materials to suit topside and Subsea applications with design pressures up to 690 bar.
Design features available include:
- Carbon, 316 and 304 Stainless-Steel construction.
- Duplex, Super Duplex and 6Mo available on request.
- Working pressures up to 690 bar.
- Optional Bladder and seal materials to suit a wide variety of temperatures and system fluids.
- External protective coatings.
Again, we can create designs in accordance with requirements and approvals for most countries in the world.
Piston Accumulators
We specialise in the design and manufacture of Piston Accumulators: see our Design Standards section for more information.
We offer Piston Accumulators in an infinite range of sizes, typically 0.5 to 500 litres. They can be provided in a range of materials to suit both topside and Subsea applications, including:
- 316 Stainless-Steel.
- Duplex/Super Duplex.
- 17-4 Stainless-Steel.
- Carbon/Alloy Steels with many others available on request.
External coatings are also available.
Bespoke designs include the following options:
- Pressures of 0 to 2500 bar.
- Large temperature ranges.
- Bespoke sizing to suit customer needs.
- Various elastomers to suit the application (medium, temperatures, movement and pressures).
- Excellent pressure ratios
- Magnetic level gauges, switches and transmitters (ATEX approval and HART protocol available).
Design Standards
QHP can design and manufacture to the following standards:
- BSEN 14359 (British/European Accumulator Code).
- ASME VIII Division 1 (U Code Stamp available).
- AS1210 (Australian Pressure Vessel Code).
QHP can also offer the following approvals:
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Diaphragm Accumulators
The pressure fluctuations occuring in hydraulic systems can be periodical or one-off problems due to:
- Flow rate fluctuations from displacement pumps.
- Actuation of shut-off and control valves with short opening and closing times.
- Switching pumps on and off.
- Sudden linking of spaces with different pressure levels.
QHP/HYDAC hydraulic dampers are particularly suitable for damping such pressure fluctuations.
Selecting the most suitable hydraulic damper for each system ensure that:
- Vibrations caused by pipes, valves, couplings etc are minimised and resulting pipe and valve damage is prevented.
- Measuring instruments are protected and their performance is no longer impaired.
- The noise level in hydraulic systems is reduced.
- The performance of machine tools is improved.
- Interconnection of several pumps in one line is possible.
- A pump rpm and feed pressure increase is possible.
- The maintenance and servicing costs can be reduced.
- The service life of a system is increased.
- Volume range from 0.16 to 4.0 litres with max working pressure of 210 bar, other volumes and pressures are available on request.
Accessories and Accumulator Charging
To provide the total package QHP offer an extensive range of accessories including portable and permanent nitrogen charging equipment, service tool kits, fluid port adaptors, mounting brackets and clamps to suit all UK and European standard Bladder Accumulators.
- Nitrogen hoses.
- UK, European and USA gas bottle adapters.
- European and USA Accumulator gas stem adapters.
- Service tool kits.
- Clamps and brackets designed for specific use on Bladder Accumulators are supplied complete with rubber supports to ensure rigid mounting of the Accumulator mass (see Mounting Elements).
Please contact the QHP sales department for further information.
Charging and testing Kits
QHP are able to provide a range of nitrogen charging equipment to charge Accumulators with nitrogen or to check or to change the existing pre-charge pressure in Accumulators.
For this purpose the charging and testing unit is screwed onto the gas valve of the hydraulic Accumulator and connected to a commercial nitrogen bottle via a flexible charging hose. If the nitrogen pressure is only to be checked or reduced the charging hose does not need to be connected. The unit has a screw-type fitting with a built in gauge, check valve and a spindle for opening the Accumulator gas valve to control the pressure.
Mounting Elements
Mounting Elements
QHP support Brackets and Clamps are used to mount all types of hydraulic Accumulators safely and simply, irrespective of the mounting position.
Clamps, Brackets and complete Accumulator sets are available. The supports are designed for static use for dynamic stresses, specially designed Clamps are available on request.
For further information on these products, you can download the Brackets Datasheet and the Clamps Datasheet below.
Safety Blocks
The QHP Safety and Shut-Off Block is used to shut off and discharge hydraulic Accumulators or user units. It complies with the relevant safety standards in accordance with DIN EN 982 and the German industrial safety regulations, BetrSichV.
For further information on these products, you can download the Safety Blocks Datasheet below.
Coolers
In hydraulic systems, energy is transformed and transmitted. During this transformation and transmitting, losses occur, i.e. mechanical and hydraulic energy is converted into heat. It is the function of cooling systems to dissipate this heat.
HYDAC is a proven partner and supplier of a modular series of components and systems in cooling technology, specially designed for such functions.
Application-based engineering designs are developed and manufactured in product-orientated laboratories, testing and production facilities for applications in mobile and industrial machinery and systems.
QHP carry stock of a standard range of return line Coolers, offline Coolers, and Plate Heat Exchangers.
You can download brochures for the below products on our downloads page.
- Return line Coolers 415V-3PH-50HZ and 230V-1PH-50HZ (OKEL Series).
- Return line Coolers with compact motor design 415V-3PH-50HZ and 230V-1PH-50HZ (OKELC Series).
- Return line Coolers 12VDC and 24VDC (OKELD Series).
- Offline Coolers 415V-3PH-50HZ and 230V-1PH-50HZ (Silent Series SC Type).
- Oil and water Plate Exchangers.
