Accumulators

Safety and shut-off blocks SAF are used to shut off and discharge hydraulic accumulators

• NG = 10 / 20 / 32 / 50
• pmax = 400 bar

The HYDAC Safety and Shut-off Block SAF (NG 10/20/32/50, pmax 400 bar) is a compact, multifunctional unit designed for safely shutting off and discharging hydraulic accumulators. Available with manual or solenoid-operated discharge and optional proximity or limit switches, it simplifies installation, reduces pipe fittings, and saves space and maintenance effort. Its versatile design supports a wide range of connections and the integration of additional control valves for flexible system configurations.

Accumulator sets SEB / SEH / SEM / SEHB 

• for SB35 ... SB600
• for SB35H
• for SB35HB

HYDAC Accumulator Sets SEB / SEH / SEM / SEHB provide safe, secure, and easy installation solutions for SB35 to SB600 series accumulators, including SB35H and SB35HB. Designed for static applications, these sets include clamps, consoles, and complete mounting solutions, adaptable to various positions and locations. For dynamic applications, specially engineered clamps are available on request.

Metal bellows accumulators

• Nominal volume: up to 6 l
• Permitted operating pressure: up to 210 bar

HYDAC Metal Bellows Accumulators (up to 6 L, 210 bar) offer gas-tight, maintenance-free pulsation damping across wide temperature ranges, making them ideal for demanding fluid systems. Especially effective in fuel injection systems of heavy diesel engines, they reduce pressure fluctuations caused by high-pressure pumps, protecting sensitive components from damage. Their media resistance and sealed design ensure long-term performance and system reliability.

HYDAC Pulsation Dampers SB 

• V = 1 ... 32 l
• p = 330 ... 1,000 bar
• High-Flow-Version: Qmax = 30 l/s

The HYDAC SB Pulsation Damper (1–32 L, 330–1,000 bar) effectively reduces pressure fluctuations and flow irregularities in high-pressure hydraulic systems, with a High-Flow version supporting up to 30 L/s. Designed to prevent pipe fatigue, protect sensitive components, and lower noise levels, it enhances system reliability and extends service life. Ideal for displacement pumps, control instruments, and chemical process circuits, it also supports reduced maintenance costs and improved machine performance.

Standard hydraulic piston accumulators SK

• Nominal Volume : 0.2 to 600 litre
• Pressure Range : 210 / 350 bar
• Standard Temperature Range : 10°C to +80°C

The Hydac SK Standard Hydraulic Piston Accumulators offer reliable energy storage with volumes from 0.2 to 600 litres and pressure ratings up to 350 bar. Featuring a finely machined cylinder, lightweight floating piston, and customizable sealing systems, they are ideal for diverse hydraulic applications. Corrosion-resistant options and safety devices are available for harsh environments and demanding conditions.

Welded diaphragm accumulators SBO

This accumulator features a dual-chamber design with a flexible diaphragm that separates the gas and fluid sections. As system pressure rises, fluid enters the accumulator and compresses the gas; when pressure drops, the gas expands, forcing the stored fluid back into the circuit. It includes a welded pressure vessel that can be sealed or gas-rechargeable, multiple fluid connection options, and an integrated valve poppet at the base of the diaphragm.

Standard hydraulic bladder accumulator SB

• Nominal Volume : 0.5 to 200 litre
• Pressure Range : 330 / 400 / 500 bar
• Standard Temperature Range : 10°C to +80°C

The HYDAC standard bladder accumulators, models SB330/400/500/550, consist of a pressure vessel, a flexible bladder with a gas valve, and a hydraulic connection with a check valve. The pressure vessels are seamless and manufactured from high-tensile steel.

The HYDAC Accumulator Charging and Testing Units (FPU-1 series) are essential tools for charging hydraulic accumulators with nitrogen and monitoring or adjusting pre-charge pressure. Suitable for bladder, piston, and diaphragm accumulators, each unit includes a valve body, spindle, check and release valves, pressure gauge, charging hose, and A3 adapter. High-pressure variants—FPS 600, FPK 600, and FPH 800—support pre-charge pressures up to 800 bar, providing reliable performance across a wide range of accumulator types and applications.

Special high pressure models are also available: 

• FPS 600
• FPK 600
• FPH 800

Safety and shut-off blocks DSV is used to isolate and discharge hydraulic accumulators

• NG = 10
• pmax = 350 bar
• simpler version of the SAF 10

The HYDAC Safety and Shut-off Block DSV10 (NG 10, pmax 350 bar) is a cost-effective, simplified alternative to the SAF10, designed for isolating and discharging hydraulic accumulators and consumers. This compact three-way valve block integrates a pressure relief valve and shut-off valve, with optional solenoid control for automatic discharge. Ideal for space-saving and efficient setups, it simultaneously shuts off and discharges to the tank, streamlining hydraulic system safety.

Pulsation dampers welded SBO

• V = 0.075 ... 4 l
• p = 50 ... 330 bar

The HYDAC SBO Welded Pulsation Damper (0.075–4 L, 50–330 bar) is designed to minimize pressure pulsations, reduce noise, and prevent pipe fatigue in hydraulic systems. Ideal for displacement pumps and sensitive instrumentation, it enhances measurement accuracy, supports pump interconnection, and extends overall system life. Its compact, welded design also contributes to lower maintenance costs and improved machine performance.

SK High pressure hydraulic piston accumulators

• Nominal Volume : 1 to 50 litre
• Pressure Range : 690 / 800 / 1000 bar
• Standard Temperature Range : 10°C to +80°C

The HYDAC High Pressure SK Piston Accumulators are engineered for demanding applications, offering volumes from 1 to 50 litres and operating pressures up to 1000 bar. Featuring a finely machined cylinder, floating metal piston with high-pressure seals, and corrosion-resistant options, they deliver reliable performance in extreme environments.

HYDAC Diaphragm Accumulators Threaded SBO

The HYDAC Threaded SBO Diaphragm Accumulators feature a rugged, forged construction with an exchangeable diaphragm that separates gas and fluid for efficient energy storage and release. Designed for durability, they include corrosion protection options like plastic coating, galvanic or chemical treatments, and stainless steel versions for use with aggressive fluids.