Flowserve Durametallic Double CRO - Manual (Page 4)

2.5 Lubricate the other stationary face seat gasket O-ring with
water or soap solution and place this O-ring on the back shoulder
of the remaining stationary face. Slide the inner stationary face
with the O-ring into position at the bottom of the chamber.
2.6 Wipe the seal faces clean with alcohol. Seal faces should not be
lubricated but should be left clean and dry.
Caution: Consult material safety data sheets for proper handling
of alcohol.
2.7 Install the seal chamber (pump back-plate) and assemble
the pump. Position the gland to the face of the seal housing.
Be sure the gland pilot is properly engaged. Tighten the gland
stud nuts evenly, cross stagger the adjustment of the nuts.
Follow the equipment manufacturer’s recommendation for gland
stud nut torque. In the absence of recommendations, gland stud
nuts should only be torqued to establish a leak tight seal at the
gland gasket. Proper land bolt adjustment is especially important
with clamp style inserts where torque may damage the insert.
In this case, gland stud nuts should be torqued to a maximum
of 13.5 N-m (10 ft-lbs).
2.8 See section 4, Operational Recommendations, before starting
pump.
3 Double Suction and Multistage Horizontal Split Case
Pumps (2 seal chambers)
4
Note: The parting gasket between the upper and lower sections of
the pump casing must be flush with the seal chamber bore and face
or leakage will occur past the O-rings and gaskets.
3.1 Lubricate the shaft or sleeve and the seal chamber bore with
water or a mild water soluble soap solution.
3.2 Lubricate one stationary face seat gasket O-ring with water
or soap solution and place this O-ring on the back shoulder of the
inner stationary face. Slide the stationary face with the O-ring into
position at the bottom of the chamber. Do not bump the stationary
face against the shaft as it may chip, crack, or break.