Bladder Accumulators

A) A flexible separator bladder is fitted into a pressure vessel
(accumulator shell).
B) Through a special valve an inert gas(nitrogen) is introduced into the
bladder with pressure P0. The bladder expands, filling the entire volume
V0 of the accumulator shell.
C) When circuit pressure P1 is higher than the gas pre-charge pressure P0,
the liquid valve opens. And the bladder is compressed reducing the gas
volume to V1.
D) When the liquid pressure rise to P2, the volume of gas reduces to V2 with
an attendant rise in pressure, thus balancing the liquid pressure.
This means that the accumulator has been pressurized
ΔV=V1-V2 and a potential energy has been created to be utilized as desired.

Piston Accumulators

- Optimal application solution derived by changing diameter or length.
- Piton position monitoring possible.
- Total discharge is possible
- Long life, reduced friction sealing system.
- Maintainable design
- Low gas permeation compared to bladder or diaphragm accumulators due to
small sealing areas.
- Low piston weight guarantees high dynamics.
- Large connection cross-section possible.
- Sealing systems available for different kinds of operating liquids, wide
temperature range and applications.
- In case of failure no abrupt gas loss can occur.