Mts Series 505G2 SilentFlo Hydraulic Power Unit Model Manuel d'utilisateur télécharger pdf (Page 68)

Model 505G2.07/.11 SilentFlo™ HPU

Precharging the Surge Suppressor Accumulator

1. Slowly open the bleed valve on the charging kit until gas begins to escape.

When the pressure reading on the appropriate pressure gage drops to the

level required, close the bleed valve.

2. Close the locknut. Open the bleed valve on the accumulator charging kit and

remove the chuck valve from the accumulator.

3. Install the valve stem cap and protective cover.

Increasing pressure To increase the precharge pressure:

1. Close the locknut on the surge suppressor.

2. Open the bleed valve two turns.

Mixing gases can produce unpredictable results.

Do not use another gas to precharge a surge suppressor.

Use only dry nitrogen gas to precharge surge suppressors.

3. Connect the nitrogen supply hose from the supply bottle pressure regulator

output to the input check valve on the charging kit.

4. Open the nitrogen bottle valve. Check the nitrogen bottle pressure gage on

the regulator. (The bottle must contain sufficient pressure to provide an

adequate gas volume.)

5. Monitor the regulator output pressure gage and adjust the regulator output

pressure valve to the required level.

Avoid rapid and extreme pressure transitions.

Rapid flow rates with pressure differentials of more than 2.1 MPa (300 psi)

across the input check valve can damage the valve seal(s).

Do not allow rapid flow rates. Open the regulator shut-off valve only far enough to

permit a gradual transfer of gas.

6. Slowly open the regulator shut-off valve until gas is heard escaping from the

accumulator charging kit bleed valve.

A. Allow gas to slowly escape for approximately ten seconds, and then

close the bleed valve.

B. Immediately close the regulator shut-off valve before the pressure

reading on either the high or low charging kit pressure gage exceeds the

pressure level of the accumulator.

WARNING

CAUTION

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Mts Series 505G2 SilentFlo Hydraulic Power Unit Model Manuel d'utilisateur Page 68