Bell & Gossett Pump 90-34S

Replace the stationary insert and rotating seal assembly as a set

Disconnect and lock out the electrical supply

Remove the conduit box cover and disconnect the conduit and wiring

Close the suction and discharge isolation valves

Is the system drained if no isolation valves are installed?

Open the drain valve and wait until liquid stops flowing

Check motor size and lubrication requirements

Use lubricant suited for motor bearings

Record manufacturer's nameplate instructions for lubrication

Control capacity only with the discharge-side regulating valve

Is the driver overloaded due to denser fluid or exceeded flow rate?

Is the pump operating at or near rated conditions?

Check for excessive vibration that could damage bearings, the seal chamber, and the mechanical seal

Has the idle pump exposed to freezing conditions been fully drained of liquid?

Flush and clear the piping system of dirt or debris before startup.

Bring variable-speed drivers up to rated speed as quickly as possible.

If the pumped fluid will exceed 200°F (93°C), has the pump been warmed up by circulating a small amount of fluid until the casing temperature is within about 100°F (38°C) of the fluid temperature?

Confirm the area is clear and briefly jog the driver to verify the direction of rotation matches the arrow on the pump body.

Lock out power to the driver again once rotation is confirmed.

Store the pump in a covered, dry location

Keep the unit free of heat, dirt, and vibration

Turn the shaft by hand several times

Repeat shaft rotation every three months while in storage