Description
To maintain system performance HYDAC recommends that the gas precharge pressure is checked regularly. A loss in the gas precharge pressure will cause a drop in the system efficiency and could cause damage to the bladder, diaphragm, or piston accumulator.
HYDAC charging and gauging units allow hydro-pneumatic accumulators to be precharged with dry nitrogen. For these purposes, a charging and gauging unit is connected to a commercially available nitrogen bottle via a flexible charging hose.
These units also allow maintenance personnel to check the current gas precharge pressure of an accumulator. For critical systems, consider the use of a permanent gauging block which will allow constant monitoring.
All HYDAC charging and gauging units incorporate a gauge and check valve in the charging connection, and a manual bleed valve with a T-handle.
HYDAC offers two types of charging and gauging units:
- FPK – For use with gas valve version 1 (M28 × 1.5) for SBO and SK Series accumulators.
- FPS – For use with gas valve version 4 (8VI-ISO 4570) for SB, SBO and SK Series accumulators. Note: SB top repairable bladder accumulators must use FPK with FPK/SB adapter.