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Adjusting the Packing Glands
1
Use the illustration and instructions to check the
impeller shaft seals.
The pump is available with either mechanical seals
or a stuffing box with packing glands depending on
your application.
If your application includes mechanical seals,
inspect it for leaks. If leaking is found, replace the
mechanical seal per the instructions found in the
CM series pump overhaul instructions.
If your application uses packing glands, you can
adjust the packing seal by doing the following:
1. Operate the pump at its maximum intended
pressure for 10 minutes.
2. Observe the drip rate. Optimal leakage is 10
to 120 drops per minute. Maintaining this rate
facilitates the cooling of the packing.
3.
If the drip rate is too high, turn off the pump and
gradually tighten the gland nuts by 1/6 turn,
alternating between them to make sure that the
gland stays level.
4. Operate the pump at its maximum intended
pressure for 2 minutes. Observe the drip rate,
then repeat the previous step until leakage is
within the optimal range.
5. Repeat the process with the packing housing at
the other end of the pump.
6. Perform vacuum test per NFPA standards.
