Product Description
46
236 Series Twin-Screw Pump -
Installation, Operation & Maintenance Manual
•
When a cartridge mechanical seal is used, ensure that the set screws in the seal locking
ring are tightened and that the centering clips have been removed prior to startup. This
prevents seal or shaft sleeve damage by ensuring that the seal is properly installed and
centered on the sleeve.
You must follow these precautions before you start the pump:
•
Flush and clean the system thoroughly to remove dirt or debris in the pipe system in
order to prevent premature failure at initial startup.
•
If temperatures of the pumped fluid will exceed 107°C (225°F), then warm up the pump
prior to operation. Circulate a small amount of fluid through the pump until the casing
temperature is within 28°C (50°F) of the fluid temperature. Accomplish this by flowing
fluid at 0.23m
³
/h (1 GPM) or 0.25% of the pump rated flow, whichever is larger, into the
pump casing drain and out of the discharge nozzle (optionally, the casing vent can be
included in warm-up circuit).
•
The recommended warm up rate is 1.1°C to 2.2°C (2°F to 4°F) per minute. During the
warm up process confirm the temperature differential between the top and bottom of the
pump is less than 17°C (30°F). Allow the pump to stabilize for 2 hours at the process fluid
temperature.
Check the rotation
WARNING:
Starting the pump in reverse rotation can result in the contact of metal parts, heat generation,
and breach of containment. Ensure correct driver settings prior to starting any pump.
Failure to disconnect and lock out driver power may result in serious physical injury or death.
Always disconnect and lock out power to the driver before performing any installation or
maintenance tasks.
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local rules.
Refer to driver/coupling/gear manufacturer's installation and operation manuals (IOM) for
specific instructions and recommendations.
1. Lock out power to the driver.
2. Remove the coupling guard
3. Make sure that the coupling hubs are fastened securely to the shafts.
4. Make sure that the coupling spacer is removed.
5. The pump is normally shipped with the coupling spacer removed.
