ITT Goulds Pumps XHD, Installation, Operation And Maintenance Manual

Page: 62 / 160

Commissioning, Startup, Operation, and Shutdown
XHD Installation, Operation, and Maintenance Manual 60
c) Four packing rings (106)
1. Flush connection
2. Packing rings
3. Lantern ring
Figure 43: Full flush setting (1L4)
4. Install the gland halves and evenly hand-tighten the nuts .
NOTICE:
Do not overtighten gland nuts. Overtightened packing causes excessive friction between
packing and sleeve and will result in damaged components.
Table 9: Flush water requirements
The flush water requirements are listed for both the weep style and full flush packing arrangements.
Group Size (L5) Full Flush
GPM (liters/
min) Full Flush (1L4)
GPM (litres/
min) (2L3) Weep
Flush GPM
(liters/min) Mechanical
Seal Flush
PF1 XHD50,75 10 (38) 6 (26) 0.2 (0.8) Consult Seal
Mfg
PF2 XHD80 15 (57) 10 (38) 0.3 (1.1)
PF3 XHD125 23 (87) 18 (68) 0.6 (2.3)
PF4, PF4S XHD150,200 37 (140) 32 (121) 1.1 (4.2)
PF5 XHD250,300 61 (231) 56 (212) 2.2 (8.3)
Pump priming
WARNING:
These pumps are not self priming and must be fully primed at all times during operation.
Loss of prime can lead to excessive heat and severe damage to the pump and seal.
Pumps that are not self-priming must be fully primed at all times during operation.
Prime the pump with the suction supply above the pump
1. Slowly open the suction isolation valve.
2. Open the air vents on the suction and discharge piping until the pumped fluid flows out.
3. Close the air vents.