Commissioning; General; Precautions - Johnson Pump SPX FLOW TopGear GS Instruction Manual

4.0 Commissioning

4.1

General

Take note that the TopGear pump is a Positive Displacement pump and procedures
may often differ from procedures commonly used for centrifugal pumps. Follow the
instructions and checklist given in the IM and the separate instructions for gear and motor
drives.
Ensure that all the shut-off valves are fully opened and the strainers are
unclogged before starting up the pump.
4.2

Precautions

For explosion protection the following precautions are of importance:
• Ensure that the area around the pump and the pump unit is clean.
• Ensure that the suction line si fitted securely and tight and is clean. Welding particles
should be removed in advance.
• The pump, the shaft sealing area or magnetic coupling and the auxiliary equipment must
be vented and filled with the product to be pumped before any operation.
• In case of self priming dry running of the pump must be avoided and an appropriate
quenched shaft seal must be provided to prevent dry running of the shaft seal.
• Determine the direction of rotation with the motor disconnected from the pump or
ensure that the pump is filled up and vented before start-up.
• Ensure the shutoff valves in the suction and discharge lines are opened at start-up.
• In case the pumped liquid needs to be heated, ensure the pump, shaft sealing area and
the product to be pumped are sufficiently preheated before start-up.
• Shut down the pump immediately in the event of irregular operating modes or mal-
function.
• Shut down the pump in case the flow drops or the pump pressure changes ab-
normally (i.e. lower or higher pressure). A flow decrease or pressure change is often
a sign of malfunction, a clogged strainer or internal wear. The cause must be found and
repaired before the pump should be started again, see Trouble Shooting list in the IM.
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A.0500.601 – Atex IM -TG G/H/MAG/SRT/08.00 EN (01/2021)