Flowserve Dual Pressurized Seals - Manual (Page 4)

Position the rotating seal assembly in its final axial position with the indicated
position of the seal drive lined up with Scribe Mark B. Tighten the seal drive set
screws firmly and evenly.
2.4 Lubricate the seal chamber bore with the lubricant provided. The seal chamber
is usually the stuffing box contained in the pump back plate.
2.5 Lubricate the other stationary face gasket O-ring and place it on the back
shoulder of the inner stationary face. Slide the inner stationary face with the
O-ring into position at the bottom of the chamber. The rubbing or sealing surface
of the inner stationary face should face out, away from the impeller.
2.6 Wipe the seal faces clean with alcohol. Seal faces should not be lubricated but
should be left clean and dry.
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 recommendations for
gland stud nut torque. In the absence of recommendations, gland nuts should only
be torqued to establish a leak tight seal at the gasket. Proper gland bolt adjustment
is especially important with a clamp style stationary face where excessive torque
may damage the face.
2.8 See Section 5, 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
Scribe Mark A on the shaft or sleeve at the face of the seal housing, Figure 1.
Refer to the assembly drawing provided with the seal for the seal collar dimension
setting shown in a box . Scribe Mark B, Figure 1, at this dimension from Scribe
Mark A. (See Section 4 for ball drive designs).
3.2 Lubricate the seal chamber bore with the lubricant provided. The seal chambers
are usually the stuffing boxes, located near the bearing brackets.
3.3 Lubricate one of the stationary face mountings and place it on the back
shoulder of the inner stationary face. Slide the inner stationary face with the
O-ring into position at the bottom of the chamber. The rubbing or sealing surface
of the inner stationary face should face out, away from the pump impeller.
3.4 Wipe the seal faces clean with alcohol. Seal faces should not be lubricated but
should be left clean and dry.
3.5 Lubricate the shaft or sleeve and rotating gasket O-ring with the silicone
lubricant provided.