8302216 [Accumulator Test Tool]
Instruction Guide
1404 13
th
St. South Humboldt, IA 50548 Phone: 844.247.2162 www.hy-capacity.com
052019
INST-8302216.DOCX
Note
: Full nitrogen pressure may damage the gauge. Connect the charging hose to a commercially available nitrogen
bottle by means of the G4 adapter (other adapters are available, check with factory for type); the adapter connects to
the cap screw “G1”. Connect cap nut of the charging and gauging unit (see fig. 1). Connect the appropriate charging
and gauging unit to the accumulator by following the instructions previously described.
Initial Charging
When charging an accumulator that has no initial gas precharge, allow 20 to 30 minutes for the gas temperature and thus
pressure to stabilize. Recheck the gas precharge pressure and adjust if necessary.
FPK Unit
Turn T-handle counter clockwise 3 full turns.
Pressure Increase
When charging an accumulator that has an existing gas precharge, allow 5 to 10 minutes for the gas temperature and thus
pressure to stabilize.
FPK Unit
Turn T-handle counter clockwise until the gauge needle begins to deflect, then turn it another full turn.
Filling
Open the shut-off valve on the nitrogen bottle and slowly fill the accumulator with dry nitrogen gas. Precharge very slowly
until the pressure in the accumulator reaches 100 psi. Once 100 psi is reached, the charging rate can increase. Charging
too quickly may damage the accumulator.
Note
: The gauge registers the line pressure, not necessarily the accumulator pressure while charging. After allowing the
appropriate time for the gas temperature and thus pressure to stabilize, adjust the gas precharge
pressure as required, refer
to “Pressure Increase” or “Pressure Release”.
Once the desired gas precharge pressure is reached close the shutoff valve on the commercially available nitrogen bottle.
Remove the charging and gauging unit from the gas valve as described under “Removal of Charging and Gauging Unit”.
Removal of Charging and Gauging Unit
Close the shut-off valve on the commercially available nitrogen bottle before removing the charging and gauging unit.
FPK Unit
Turn T-handle clockwise until resistance is felt to close the socket head cap screw, hand tighten. Open manual bleed valve
to relieve pressure in the charging and gauging unit. Proceed to “Disconnecting”.
Disconnection
Unscrew the charging and gauging unit from the gas valve. Note: FPK unit with adapter FPK/SB it may be necessary to
loosen the connection between cap nut and the adapter to remove the charging and gauging unit. Check for leaks. None
are permissible.
Completion
HYDAC Gas Valve Version 1
(
see Fig. 1
)
Tighten socket head screw cap to 20 Nm (15 lb-ft), and screw on valve protection cap (
where applicable
); hand tighten.