Flowserve LS-300 Series Durametallic - Manual (Page 3)

3
3 Pipe Taps
3.1 The 1/4 inch pipe taps are dead-ended between the lips. One goes between the first
and second lips and the other goes between the second and third lips. Most users
plug these ports.
These ports should be used if the product pumped polymerizes when sheared or
polymerizes when it contacts the air. In those instances a suitable solvent can be put
into the ports.
Caution: Very light solvents, as thin or thinner than water, may decrease the seal life.
For special problems encountered during installation, contact your nearest Flowserve Sales
and Service Representative or Authorized Distributor.
LS-300
2.3 Position the cartridge gland against the seal chamber face and tighten
the gland stud nuts up evenly, cross staggering the adjustment of the nuts. Do not
over tighten the gland nuts.
2.4 Adjust the bearings, coupling, and impeller so that the shaft is in its operating
axial position. Any subsequent axial adjustment of the shaft requires resetting of
the seal.
2.5 Tighten the set screws in the seal cartridge collar to the shaft.
Suggested minimum torque values for the set screws are as follows:
Alloy C-276 or 316 SS Torque Value
#10 - 24 UNC 2.3 N-m (20 inch-lbs)
1/4" - 20 UNC 5.0 N-m (45 inch-lbs)
5/16" - 18 UNC 9.0 N-m (80 inch-lbs)
Alloy Steel, Plated Torque Value
#10 - 24 UNC 3.5 N-m (30 inch-lbs)
1/4" - 20 UNC 9.0 N-m (80 inch-lbs)
5/16" - 18 UNC 118.0 N-m (60 inch-lbs)
2.6 Remove the setting devices from the cartridge sleeve collar. These setting devices
should be saved and reinstalled for seal removal and repair or for repositioning the
pumps impeller.
Eccentric washers or rectangular style setting devices can be repositioned clear of
moving parts and locked in place on the gland for storage. These should be returned
to the setting position for seal removal and repair or for repositioning the pump impeller.
Setting
Device
Standard Barrier Ports for
Optional Leak Detection or
External Fluid Barrier