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Bladder-type SI accumulators consist of a seamless cylindrical body made of high-strength steel. The rubber bladder is mounted inside the body. Through the gas valve, the bladder is filled with nitrogen up to the expected precharge pressure. When the hydraulic system pressure exceeds the pre-charge pressure, fluid enters the accumulator and is stored as potential energy. When system pressure decreases, the nitrogen expands and returns the stored fluid to the system. Repairable construction with seamless high-strength steel body, painted. Gas side connection 5/8" UNF. Manufactured in accordance with European Directive PED 2014/68/EU, EN 14359:2017 and EN13445-3:2021; also available to ASME VIII Div. 1 Appendix 22 with U-STAMP.
| Volume Range | 4 – 55 litres |
| Max Design Pressure | 360 bar |
| Available Pressures | 140 – 250 – 360 bar |
| Membrane Materials | NBR, NBR-40°, EPDM, H-NBR, ECO, FKM (Viton) |
| Body Materials | Carbon steel, AISI316L, SAF duplex stainless steel |
| Gas Connection | 5/8" UNF |
| Certifications | PED 2014/68/EU, EN 14359:2017, EN 13445-3:2021; ASME VIII Div. 1 U-STAMP available |
| Construction | Repairable, seamless high-strength steel body |
Bladder accumulators with bottom connection model, for high efficiency and high discharge capacity, available in carbon steel.
Repairable and refillable accumulators with rubber separator element; small and easy to maintain, ideal for hydraulic applications.
Accumulators and pulsation dampeners with rubber diaphragm, for pressures up to 1000 bar. Widely configurable, available in materials from stainless steel to titanium.
Contact our engineering team for custom specifications, material options, and technical support for the Bladder Accumulators SI.
