A bladder accumulator is the most commonly used hydro-pneumatic accumulator. The bladder is filled with nitrogen and fitted in a welded or forged steel pressure vessel. The bladder is made of an elastic material (elastomer), e.g. rubber. The gas pre-charge pressure can be adapted via the gas inlet/outlet valve on top of the bladder accumulator.
If the bladder accumulator is mounted vertically or at an angle, the gas side must always be on top. When the pressure drops, the compressed gas in the bladder expands and pushes the stored fluid into the hydraulic circuit. At zero pressure, the bladder may be pushed out of the pressure vessel. To prevent this, a spring-loaded valve is provided on the fluid side.
The bladder accumulator is used when a high power output is required. Our specially designed bladder accumulators are capable of operating at maximum pressures of up to 5,000 psi for carbon steel material and up to 2,000 psi for stainless steel material. The gas volume is from 1 Pint to 15 Gallon as standard (other non-standard custom sizes are available).
Our bladder accumulators are made in the U.S.A.
Note that by combining several accumulators in a hydraulic sub-system, you can reach any capacity you would like by just adding extra accumulators to that sub-system.
APPLICATIONS:
Energy & Pump Maintenance Savings:
Reduction of pump capacity requirements which provide long term energy savings and lower pump maintenance costs.
Surge Control & Shock Absorbers:
Pulsation dampening and noise reduction caused by pumps and “water hammer”.
Eliminate Sudden Pressure Drops:
Maintain constant pressure on a hydraulic system such as a press line where multiple presses are opened and closed at different times.
Thermal Expansion:
Compensates for pressure variations caused by temperature changes within a hydraulic circuit.
Compensates for pressure variations caused by temperature changes within a hydraulic circuit.
Provides stored fluid power for operation of hydraulic equipment power failure.
Product FEATURES
- The bladder possesses small inertia with quick response, making it suitable for pulsation dampening;
- Gas leakage is not likely to occur; the oil won’t come into contact with the gas;
- Simple installation, easy charging and maintenance;
- Shell: Chrome-Moly steel per SA 372 Gr E Cl 70, seamless non-welded, pressure tested to 1.5 times
- working pressure per ASME B&PV Code Section VIII Div 1, serialized and “U” stamped by ASME authorized inspector. U-1A certification provided as standard service. Other international certifications available by special order.
- Bladder: Rubber compounds are standard Nitrile and high temperature Viton. Other elastomers are available by special order. All materials are made in the USA.
- Port Assembly: Standard fluid ports 1-1/4”NPT and 2” NPT, machined from alloy steel coated for anti-corrosion; stainless steel fluid ports available for water service; ASME flange connection available by special order. All fluid port components are made in the USA.