1. Calculate the precharge pressure
a) Mean Line Pressure (PSIG) + Atmospheric Pressure = Absolute Pressure (PSIA)
b) Absolute Pressure (PSIA) x Precharge Percentage (80% max) = Pressure Absolute
c) Pressure Absolute – Atmospheric Pressure = Precharge Pressure (PSIG)
2. Isolate PULSAtrol from line.
3. Carefully drain off process fluid by opening a drain valve (see recommend piping
arrangement).
4. Apply precharge pressure (additional liquid may drain as diaphragm moves).
5. Close drain valve.
6. Place PULSAtrol in stream.
B) SUCTION SETUP (FLOODED SUCTION)
Charge the PULSAtrol with adequate pressure to overcome the static suction head. Start up
the pump. Depress the stem on the charge valve, but only during discharge strokes of the
pump, until the gauge indicates pressure pulses. The diaphragm has now centered allowing the
PULSAtrol to accumulate liquid while the pump is discharging. If too much air becomes
released and the gauge will not indicate pressure pulses, recharge the PULSAtrol and repeat
the procedure.
Use the following to complete a Pre Charge Procedure for Suction Installation
1. Isolate accumulator from line.
2. Carefully drain off process fluid by opening a drain valve (refer to Figure 24).
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.
PULSATROL REMOVAL
When removing or disassembling a PULSAtrol, drain all piping and remove all air and process
pressure. Assume that the diaphragm is broken and the chamber is flooded under pressure
since the pressure gauge could be damaged. Separate chambers with caution in a direction
away from the body.
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