Hydraulic Accumulators - Auxiliary Machinery and Engine Room
Gas-charged hydraulic accumulators store hydraulic energy, absorb pressure pulsations and compensate for leakage or emergency demand. They are widely used in engine-room and deck hydraulic systems, steering gear and auxiliary machinery.
ProShipWorks provides end-to-end support to source and supply Hydraulic Accumulators for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Hydraulic Accumulators |
|---|---|
| Product Category | Auxiliary Machinery and Engine Room |
| Product Reference | 337 |
| Brands / Manufacturers | HYDAC, Parker Olaer, Bosch Rexroth |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Stores pressurized hydraulic fluid for peak or emergency demand |
| 2. Dampens pump pulsations, pressure shocks and water hammer |
| 3. Commonly supplied as bladder, piston or diaphragm type |
| 4. Pre-charged with dry nitrogen |
| 5. Available with corrosion-resistant coatings and marine-approved materials |
Applications of Hydraulic Accumulators
| Application |
|---|
| 1. Steering gear, controllable-pitch propeller and thruster hydraulic systems |
| 2. Main engine, gearbox and auxiliary machinery control or lubrication systems |
| 3. Deck machinery, cranes, winches and hatch-cover hydraulic systems |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| SB330 | HYDAC |
| EHV | Parker Olaer |
| HAB | Bosch Rexroth |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| HYDAC SB330 | Nominal volume range | 0.5-200 | L |
| HYDAC SB330 | Maximum operating pressure | Up to 350 | bar |
| Parker Olaer EHV | Nominal volume range | 0.2-57 | L |
| Parker Olaer EHV | Maximum working pressure | Up to 350 for standard variants | bar |
| Bosch Rexroth HAB | Nominal volume range | 1-50 | L |
| Bosch Rexroth HAB | Maximum operating pressure | Up to 350 | bar |
| Gas-loaded accumulator | Pre-charge gas | Dry nitrogen | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Commonly designed to EN 14359 and installed within hydraulic systems conforming to ISO 4413. PED 2014/68/EU or ASME BPVC Section VIII certification may apply according to vessel jurisdiction, accumulator size, pressure and selected product variant. |
|---|---|
| Class Approval | Marine type approval or product certification may be available from DNV, ABS, Lloyd's Register, Bureau Veritas and ClassNK. Approval is manufacturer-, model- and pressure-rating-specific and must be verified against the vessel's class requirements. |
Installation, Maintenance & Safety Information
| Installation Notes | Install in the specified orientation using approved clamps, a safety block, isolation valve, pressure relief device and drain connection. Verify pressure rating, fluid compatibility and nitrogen pre-charge before commissioning. Keep the gas valve accessible. |
|---|---|
| Maintenance Tips | Check pre-charge pressure, external leakage, corrosion, mounting security and bladder or seal condition at scheduled intervals. Use only compatible hydraulic fluid and replace damaged valves, seals or bladders with approved parts. |
| Safety Notes | Treat the accumulator as a pressure vessel. Isolate and fully depressurize the hydraulic side before service, then safely release the gas charge when required. Charge only with dry nitrogen using approved equipment; never use oxygen or compressed air. |
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