Bell & Gossett P81629F Series 80 In-Line Mounted Centrifugal Pump - Manual (Page 26)

1. Seal gland
2. Coverplate
3. For 2 in. seal: 55/64 in. (2.813 cm)
4. Seal locking collar
5. O-ring
6. Seal gland capscrew
Figure 4: 2-inch single mechanical seal
Assemble the double mechanical seal (80-D)
1. Lubricate the shaft sleeve, seal cap, and coverplate cavity with soapy water.
Do not use a petroleum lubricant.
2. Insert a stationary seal and O-ring into the seal cap.
For the 1-1/4 in. ID seal, both parts are housed in the coverplate. A seal cap gasket is
not used.
1
2
1
1. O-rings
2. Motor end
Figure 5: Double mechanical seal (1531–D)
3. Insert another stationary seal and O-ring into the coverplate.
4. Slide the seal cap onto the shaft.
5. Replace the seal cap gasket.
6. Slide the rotating portion of the seal assembly onto the shaft sleeve.
7. Assemble the coverplate onto the bracket.
8. Tighten the capscrews according to the Capscrew torque values table.
9. Attach the seal cap to the coverplate.
10. Tighten the hex nuts on the seal cap bolts according to the Capscrew torque values
table.
Maintenance
24 Series 80 Installation, Operation, and Maintenance Manual