Single Inside Pusher Type Seal Installation
2
Single End Suction Vertical Split Case Pumps (1 box)
2.1
Scribe mark A
on the shaft or sleeve to line up with the face of the seal housing.
2.2
Scribe mark B
at the seal setting point shown enclosed in a rectangular box on the assembly
drawing included with the seal. This seal setting dimension is measured from the face of the
seal housing to the back of the spring holder. The back of the spring holder will be located at
this point.
2.3
Lubricate the shaft
or sleeve lightly with the lubricant provided with the seal before installing
any seal parts.
2.4
Lightly lubricate O-ring or Duraflex seat gasket.
2.5
Press the stationary face into the gland
(flexibly mounted stationary faces only). Use hand
pressure only. Where a face has an O-ring mounting on the back shoulder, it is usually better
to nest this O-ring into the gland cavity and then push the face into the nested O-ring.
2.6
Install the gland
with stationary face over the shaft. Place the gland as close to the bearing
bracket as possible. Do not bump the stationary face against the shaft as it may chip, crack, or
break.
2.7 Install the
rotating face gasket
into the bore of the rotating face.
2.8
Install the rotating face
components on the shaft or sleeve in the proper sequence. Handle
PTFE U-cup rings and Durafite rotating face gaskets with extreme care. PTFE U-cup rings must
be assembled individually and not pushed on the shaft or sleeve while they are installed on the
rotating face. Avoid nicking or pinching either lip of the U-cup ring. Use both U-cup rings, they
work together to form an effective seal.
2.9 Set the back of the spring holder at reference mark B, Figure 5, and tighten set screws firmly
and evenly. The rotating component assembly is now in the proper position to provide the
correct setting and spring compression for final assembly.
2.10
Wipe the seal faces
clean with alcohol before completing equipment assembly.
Seal faces should not be lubricated, but should be left clean and dry.
2.11
Assemble the pump
.
2.12
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 gland
gasket. Proper gland bolt adjustment is especially important with clamp style stationary faces
where excessive torque may damage the face.
2.13
See Operational Recommendations
before starting pump.
3
The images of parts shown in these instructions may differ visually from the actual
parts due to manufacturing processes that do not affect the part function or quality.
