If pumping flammable liquids, a full risk assessment should be
completed prior to use.
The exterior surfaces of the pump may get hot during operation. Do
not take hold of the pump while it is running. Allow the pump to cool
after use before handling. The drive unit must not be run without a
pumphead fitted. The pumphead should not be run dry for extended
periods of time. The pump should not be used to pump fluids where
the temperature of the fluid can reach temperatures of more than
70°C.
Ensure the chemicals to be pumped are compatible with the
pumphead, lubricant, tubing, pipework and fittings to be used with
the pump. Please refer to the chemical compatibility guide which can
be found at: www.wmpg.com/chemical If you need to use the pump
with any other chemical please contact Watson-Marlow to confirm
compatibility
Operation of the pump after failure of the consumable peristaltic tube may result in a flow
of chemicals to the inside of the pumphead. Some aggressive chemicals are not compatible
with the pumphead materials. These aggressive chemicals will react to the matierials
internal to the pumphead and may cause leaks.
In the worst case, chemicals could leak out from the pumphead and attack the drive shaft
and lip seal, damaging the seal integrity. Damage to the seal could cause aggressive
chemicals to enter the pump housing and react wth the components internal to the pump
housing. The reaction may produce explosive gases inside the pump housing.
Danger of damage to pump and possible risk of explosion if dosing
liquid has entered the pump housing.
To prevent dosing liquid entering the pump housing follow the
recommended actions below.
In the event of tube failure the pump should be isolated from both
electrical and hydraulic supplies prior to pumphead replacement (See
"Pumphead Replacement (qdos 30)" on page 112 or "Pumphead
Replacement (qdos 20, 60 and 120)" on page 117.)
To prevent damage to the pump and pumphead due to failure of the consumable peristaltic
tube:
•
change the pumphead shortly after failure
•
install a non return valve in the discharge line close to the pump when pumping
against a positive pressure. This will prevent a constant stream of chemical flowing
back into the pumphead after failure
•
consider using an electrical interlock to isolate the power to the pump, this can be
controlled by the pump alarm signal when a leak is detected by the pump
•
do not disable the pump leak detection system
•
change the pumphead prior to failure when pumping very aggressive chemicals that
are not compatible with the pumphead materials. There are volume and hours
counters in the product to provide indication of consumable life.
m-qdos-en-02
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