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PIPE TEE
TO SYSTEM
DISCHARGE PORT
Pre-Startup Checks
Inspection checks are essential to avoid operational difficulties and ensure trouble-free
startup. Listed below are several items that need to be checked before the pump is
started:
1. Inspect all piping for undue stress and strain on the pump.
2. Flush and leak test all piping before connecting to pump.
3. Fully open inlet and outlet valves. Pump must not be started with throttled or
closed inlet or outlet valves.
4. Close all drain valves.
5. Check wiring diagrams for proper connections for voltage and rotation. Proper
rotation is indicated by an arrow on the pump. Disconnect driver coupling and start
driver momentarily to ensure correct rotation.
6. Before reconnecting driver coupling, turn pump shaft to be sure it rotates freely.
7. Reconnect driver coupling and replace guard. Make certain all other guards are in
place.
8. For relief valves that can be installed for either direction of rotation, make certain
that valve is installed properly for desired rotation.
9. Install pressure and vacuum gauges for checking startup conditions.
PRESSURE
RELIEF
VALVE
NPT
BUSHING
ROTARY GEAR PUMP
Figure 3-11. Pump By-pass Piping
NOT RECOMMENDED
SUCTION PORT
Installation
RECOMMENDED
BYPASS FLOW
SUPPLY
TANK
1070_0005a.cdr
3-11
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