TECHNICALThe precharge valve is an
essential device for filling and checking nitrogen precharge in accumulators. Made of
plated carbon steel, this valve can be used for a maximum working pressure of 350 Bar. It
is supplied in a special case that includes a pressure gauge and 7 foot of hose for
connection to the nitrogen bottle.
INSTRUCTION FOR USE
How To Check Nitrogen Pressure:
a) If the accumulator is connected to the system, please check that there is no
pressure on the oil side. Turn the valve control knob counterclockwise until it is fully
disengaged and install it on the accumulator.
b) Close the nitrogen discharge valve and turn the "AR" valve knob clockwise
until the pressure gauge signals there that there is no internal pressure left or the knob
is fully turned clockwise in the event that the accumulator is fully discharged.
c) Once the nitrogen pressure is checked, slowly unscrew the discharge valve until the
pressure starts decreasing. Once the desired nitrogen pressure is reached, fully unscrew
the control valve knob, and open the nitrogen discharge valve to eliminate any residual
pressure and then unscrew the "AR" valve from the accumulator and re-install the
protective cap of the nitrogen valve on accumulator. Be sure that the protective cap is
tightened securely.
Filling Of Nitrogen: Repeat the above mentioned operations connecting the
nitrogen bottle quick release coupling before opening the control valve knob. Start
filling the nitrogen very slowly. We recommend the use of a gas pressure reducing valve
installed on the bottle in order to avoid over-pressurization of the accumulator body
during the filling operation, especially when the precharge pressure is low. Check
nitrogen precharge approximately every six months.
Schrupp
Industries Inc
