Piston Accumulators

Product catalog summary

General Notes:
The hydro pneumatic piston accumulator is a tank in a hydraulic circuit that stores energy efficiently. It consists of two chambers separated by a piston: one for fluid under pressure and the other for nitrogen or gas. It manages pressure peaks by compressing nitrogen and releasing fluid when pressure drops.

Applications:
Piston accumulators serve as security systems in hydraulic circuits. They are used for energy storage, shock absorption, pump pulsation cushioning, thermal expansion protection, leak compensation, and transferring incompatible fluids. Key sectors include offshore, winches, machine tools, hydraulic presses, die-casting, and paper-making machinery.

Advantages:
Piston accumulators offer high flow rates, adaptability to high temperatures, and high compression ratios. They can be customized for specific capacities and volumes, and are more reliable than bladder accumulators, especially in high-temperature environments.

Douce Hydro Range:
Douce Hydro provides standard and specific ranges of piston accumulators with various fluid volumes, bore diameters, and pressures. Options include metric or inch versions, proximity switches, integrated monitoring, and anti-corrosion coatings.

Fluids and Gas:
Compatible fluids include mineral oil, water glycol, and chlorinated hydrocarbons. Anhydrous nitrogen is the standard gas, with other gases available on request. Proper filtration is essential to maintain system longevity.

Working Temperatures:
Operating temperatures range from -10°C to +80°C (14°F to 176°F), with customization available.

Certifications:
Piston accumulators are CE certified under the European Pressure Equipment Directive 97/23/EC. Other certifications, such as ASME, are available upon request.

Determining Your Piston Accumulator:
To determine the appropriate piston accumulator, provide details on fluid and gas types, temperature range, application type, working pressure, flow rate, volume, and working position.

Past References:
Examples include installations on the Charles De Gaulle aircraft carrier, fighter aircraft training stations, and cruise vessels, showcasing various sizes, pressures, and applications.

Catalog excerpts

Piston Accumulators Brochure - Page 1 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro HYDRO PNEUMATIC PISTON ACCUMULATORS

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Piston Accumulators Brochure - Page 2 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro I – GENERAL NOTES: The hydro pneumatic piston accumulator, or piston accumulator, is a sort of tank in a hydraulic circuit, capable of storing a large quantity of energy with a low volume. A piston accumulator is divided in two chambers: one...

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Piston Accumulators Brochure - Page 3 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro APPLICATIONS: Whatever the application, a piston accumulator is mainly used as a security system in the hydraulic circuit in which it is installed. The different applications are: - Energy storage: allows the release of a high quantity of...

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Piston Accumulators Brochure - Page 4 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro ADVANTAGES OF PISTON ACCUMULATORS : - Instantaneous high flow rates - Adapted to high temperatures - High compression ratio - Piston position detection (option) - Can be adapted for transfer systems (with noncompatibles fluids) - Custom capacity...

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Piston Accumulators Brochure - Page 5 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro II - DOUCE HYDRO RANGE: Douce Hydro can answer to your specific needs for piston accumulators, whatever your requirements are. STANDARD RANGE: Fluid volume Bore diameter Maximal pressure Standard (*) certification Serie ACCU DH-1000 : 0 to...

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Piston Accumulators Brochure - Page 6 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro FLUIDS AND GAS: Fluids : Gas : - Mineral oil – according to ISO 4406 (standard) - anhydrous nitrogen - Water glycol - Ester phosphate - Chlorined hydrocarbons - Other gas are possible on request - Other fluids are possible on request For a...

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Piston Accumulators Brochure - Page 7 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro III – TO DETERMINE YOUR PISTON ACCUMULATOR You’ll find hereunder the different elements you will need to provide us, so that we can determine the sizing of your piston accumulator: - Fluid type - Gas type - Minimum and maximum working temperature...

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Piston Accumulators Brochure - Page 8 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro IV - SOME PAST REFERENCES: .. Charles De Gaulle Navy aircraft carrier: Size per unit: 4 020 x 1 560 x 1 560 mm / 13 feet x 5 feet x 5 feet Fluids: Compressed air / Hydraulic oil FYRQUEL 220 MLT Working pressure : P= 210 bars at 45°C / 3 045...

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Piston Accumulators Brochure - Page 9 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Dou ce-Hydro .. Materiel for fighter aircraft pilotes training station: Piston accumulateur (Mineral oil / nitrogen) External diameter: 800 mm / 31 inches Stroke: 300 mm / 12 inches With piston position measuring system Working pressure: 350 bar / 5 075...

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Piston Accumulators Brochure - Page 10 / 10 DOUCE HYDRO SAS – 2 rue de l’industrie – BP 213 – 80303 Albert cedex – France – Fax: +33 / (0)3.22.74.78.43 DOUCE-HYDRO, inc. – 7225 Nineteen Mile Road, Sterling Heights, Michigan 48314 – USA – Fax: + 1 / 586.997.5030 Tel France: + 33 / (0)3.22.74.31.08 – Tel USA: + 1 / 586.997.5009 - www.doucehydro.com Douce-Hydro .. Bumping table for seismic tests: Supplying high instantaneous flows (1 800 liters per minute / 476 gallons per minute) 8 piston accumulators with end stroke detector (proximity switches) Diameter: 420 mm / 16 inches Stroke: 1 870 mm /...

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