Pulsafeeder Pulsa Series 680 EN - Manual (Page 24)

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7.2 Operation (Charging the PULSAtrol)
PROCEDURE: Pre-Charge Procedure for Discharge Installation
1. Calculate the precharge pressure:
Mean Line Pressure (PSIG)
+ Atmospheric Pressure
Absolute Pressure (PSIA)
x Precharge Percentage (80% Max)
Pressure Absolute
-Atmospheric Pressure
Precharge Pressure (PSIG)
=Precharge Pressure
2. Isolate PULSAtrol from line.
3. Carefully drain off process fluid by opening a drain valve (see recommended piping arrangement).
4. Apply precharge pressure (additional liquid may drain as diaphragm moves).
5. Close drain valve.
6. Place PULSAtrol in stream.
PROCEDURE: Pre-Charge Procedure for Suction Installation
1. Isolate accumulator from line.
2. Carefully drain off process fluid by opening a drain valve (see recommended piping arrangement,
attached.
3. Apply 5-10 psi precharge pressure (additional liquid may drain as diaphragm moves).
4. Close drain valve.
5. Bleed off all pressure on the PULSAtrol.
6. Open the valve to put PULSAtrol in stream.
7. Push in on the stem of the charging valve during the discharge stroke of the pump and release
during the suction stroke.
8. Continue this for about 10 times and observe the compound gauge. As accumulator functions, the
needle will go from pressure to vacuum.
PROCEDURE: Suction Installation (Suction Lift)
Consult your PULSA Series representative or the factory for details.