Product Manual A

Maintenance

31609 A MTP4000-6000DZV/DZD Operating Manual 59

Removing the O-ring Seat

If the seal is being replaced, remove the backplate (gland is built in) and press out the stationary seat.

Figure 23 - Mechanical Seal Components

Installing the O-ring Seat

Clean all parts before starting reassembly. Oil the outer surface of the seat and the O-ring with a light oil (not grease).

Place a cardboard disc on the sealing face to avoid damage. Press the seat into the gland or stuffing box using firm,

steady pressure. Make sure the seat is all the way in. Slide the gland with the gasket or backplate over the shaft.

Install the backplate, then press the seat into the backplate.

Installing the Mechanical Seal

Clean all parts of the pump before starting reassembly. Special attention should be given to the backplate and the

impeller hub.

1. Clean and lubricate the shaft.

Once the rotating portion has been placed on the shaft, the rest of the installation must be

made at once.

2. Install the stationary seat in the backplate.

3. Oil the outer surface of the seat and the O-ring with a light oil (not grease). Place a cardboard disc on the

sealing face to avoid damage. Press the seat into the gland or stuffing box using firm, steady pressure.

Make sure the seat is all the way in. Slide the gland with the gasket over the shaft.

1. Stationary seat 6. Driving band

2. O-ring seat 7. Disc

3. Retainer 8. Rotating seal face

4. Bellows 9. Stationary seal face

5. Spring

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