Stuart Turner RG550-2 - Manual (Page 5)

- 5 -

When a footvalve is required on installations that incorporate
automatic pump control, it is recommended that a suitable pressure
relief valve be fitted in the discharge (outlet) pipework from the pump.
 Do not run against a closed valve for periods longer than 5 minutes.

Do not allow plastic pump parts to come into contact with oil or
cellulose based paints, paint thinners or strippers, acid based
descalents or aggressive cleaning agents.
 Do not introduce solder flux to pumps or pump parts manufactured
from plastic. All solder joints should be completed and flux residues
removed prior to pump connection.

Always install isolating valves to both suction and delivery pipework.
 The motor casing can become very hot under normal operating
conditions. Care should be taken to ensure it cannot be touched
during operation.
Site the pump in a dry, frost-free horizontal position where it cannot be sprayed with
water and as close to the liquid source as possible.
The pump enclosure must be ventilated and there should be a minimum clearance of
80 mm between the pump and housing on all sides.
To prevent loss of pressure through pipework, use pipe size to match pump whenever
possible, minimising 90° bends.
It must be ensured that storage capacity of the liquid supply is adequate for the flow
rates required by the pump.
The pipework feeds to the storage tank should be of adequate size to ensure
replenishment rate of tank is sufficient to meet the needs of the pump.
Isolating valves should be fitted in suction and delivery pipework to enable easy isolation
and access to the pump.
When the pump is to be installed in areas where there is a risk of debris or scale build up
within the system, it is recommended that the inlet pipework is fitted with an inline strainer.
Pump Mounted Above Liquid Source (Suction Lift)
The pumps can be used in a suction lift installation providing the height of lift is within the
limits specified in the limits of application section.
A footvalve and strainer must always be used and the suction pipework size should be
22 mm throughout.
Lay the suction piping over the shortest possible distance and ensure there is a constant
rise from the liquid source to the pump. Any high spots will cause air pockets to form,
reducing system efficiency.
Ensure all joints in suction pipework are completely airtight. Failure to comply will result
in loss of prime.
The intake of the footvalve/strainer should be positioned such that is cannot be blocked
with debris or silt that are frequently found in the bottom of sumps and wells.
Cont ...