10
Pump installation
10.1
Installation instructions
Always consult an expert before installing a metering pump in a
specialised system. Metering pumps should be maintained by
qualified persons.
The pump must be bolted to a flat, horizontal, rigid surface, free from
excessive vibration, to ensure correct lubrication of the gearbox and
correct pumphead operation. Allow a free flow of air around the pump
to ensure that heat can be dissipated. Ensure that the ambient
temperature around the pump does not exceed 45 °C (113 °F).
The STOP key on pumps supplied with a keypad will always stop the pump. However, it is
recommended that a suitable local emergency stop device is fitted into the mains supply to
the pump.
Do not stack pumps.
This pump is self-priming and self-sealing against backflow. No valves are required in inlet
or discharge lines, except as described below. Valves in the process flow must be opened
before the pump operates.
Users must fit a non-return valve between the pump and the
discharge pipework to avoid the sudden release of pressurised fluid
in the event of a pumphead failure. This shall be fitted immediately
after the discharge of the pump.
qdos is a positive displacement pump; therefore, it is recommended
best practice that customers incorporate discharge pressure relief in
their piping system. Failure to fit a pressure release valve in the
discharge pipework will result in excessive build up of pressure
should the discharge become blocked. This may present a safety risk,
may cause damage to the system pipework or lead to premature
failure of the pumphead. The pressure relief valve shall be rated at no
more than 10 bar. It shall always be rated at below the users system
maximum operating pressure. It shall be installed so as to provide
easy access for maintenance, inspection and repair. It shall not be
capable of being adjusted without the use of a tool. The discharge
opening must be located and directed so that the release material is
not directed towards any person and will not deposit on parts that
could cause a hazard. There must not be a shut-off valve between the
overpressure safety device and the pump.
Do not block the drain port of the ReNu pumphead.
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