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4.2
Suction
4.2.1
Piping must be air tight.
4.2.2
For ease of maintenance an isolating valve should be located near the
pump inlet.
4.2.3
Solids should be prevented from entering low volume pumps or pumps
used for high accuracy metering.
recommended and should be adequately sized to prevent restriction of
flow.
4.2.4
Suction pipe entrance should be at least 75 mm above the bottom of
solution tank to allow settlement of larger solids in the tank.
4.3
Discharge
4.3.1
Should it be necessary to install an isolating valve in the discharge line, a
relief valve must be installed between the pump and isolating valve.
4.3.2
The 3000 Metering Pump, being a positive displacement pump, will be
damaged if operated against a closed or partially open isolating valve.
NOTE
The relief valve should be set to operate at the maximum rated pump
discharge pressure or maximum rated system operating pressure,
whichever is lower.
CAUTION
When pumping hazardous liquids the relief valve discharge should
be piped back to the supply source. This will avoid spillage should
relief valve operate.
NOTE
To ensure correct operation and maximise valve life, a pulsation
dampener should be installed between valve and pump
4.3.3
A pressure gauge with gauge protector should be installed to check if the
pump is not operating at too great a discharge pressure.
should be provided with a petcock valve for isolation from the system
when not required.
4.3.3
When pumping into a high pressure system, a non return valve should be
installed as a safety precaution at the injection point.
MP3000PR 001 to 010 Plunger PumpUpdated January 2017
A strainer of 150-200 mesh is
The gauge
Page 3
Series 3000PR
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