Figure 21:
5.
Install the gland halves and evenly hand tighten the nuts.
Connection of Sealing Liquid:
If the stuffing box pressure is above atmospheric pressure and the pumpage is clean, normal gland leak-
age of 40-60 drops per minute is usually sufficient to lubricate and cool the packing and sealing liquid is
not required.
NOTICE:
Otherwise, a product flush can be used if a clean pumpage exists.
An external sealing liquid is required when:
1.
Abrasive particles in the pumpage could score shaft sleeve.
2.
Stuffing box pressure is below atmospheric pressure due to the pump running with a suction lift,
or when the suction source is under a vacuum. Under these conditions, packing will not be
cooled and lubricated and air will be drawn into the pump.
If an outside source of clean compatible liquid is required, the pressure should be 15 psi (1.0 kg/cm2)
above the suction pressure. The piping should be connected to the lantern ring connection with a 40-60
drops-per-minute leak rate.
NOTICE:
Most packing requires lubrication. Failure to lubricate packing may shorten the life of the pack-
ing and pump.
4.2.3 Priming pump
(3196 CC and CV 3196 CC)
Never start the pump until it has been properly primed. Several different methods of priming can be used,
depending upon type of installation and service involved.
Suction Supply Above Pump
1.
Slowly open the suction valve (Fig. 22).
4.2 Checking rotation
28
3196CC Installation, Operation and Maintenance Instructions