15
Viton Models GMSV2A, GMSV4A, GMSV6C, GMSV2A3T, GMSV2A33T,
GMSV4A5T, GMSV4A53T, GMSV6C7T and GMSV6C73T
Teflon
®
Models GMST2A, GMST4A, GMST6C, GMST2A3T, GMST2A33T,
GMST4A5T, GMST4A53T, GMST6C7T and GMST6C73T
Appendix 1 - Gear Pump Gasket Adjustment for Temperature
Gear pump is factory assembled to
operate within a temperature range
of 70° – 120° F (20° – 50° C). For
temperatures outside this range,
please see the table below for your
series and port size pump.
NOTE: Always refer to the original
owner’s manual repair and mainte-
nance sections on pump disassem-
bly and assembly for more detailed
instructions.
NOTE: When pumping fluids of high
viscosity (>500 SSU), the required torque
and HP can be reduced by adding a
gasket for increased gear clearance.
Gasket Installation Instructions (refer
to assembly diagram below):
1. Turn off power to pump, turn off
inlet and outlet valves, and relieve
pressure in lines.
2. Allow pump to cool.
3. Remove cover screws (1), cover (2)
and gasket (3). Be sure to mark
proper orientation of cover and
pump body.
4. Replace gaskets (3) per instructions
listed in table.
5. Replace cover (2) and cover screws
(1) according to orientation marked
in step 3.
6. Tighten cover screws (1) in
sequence listed on diagram. Use
torque specifications listed in table.
Bolt
Tightening
Sequence
Gear Pump
Gasket Install
Assembly
Kit PN
NPT Port Size
Temp Range
Instructions
Bolt Torque
Stainless Steel Gear Pump Series
Use standard graphoil gasket as
shipped (0.010” thick)*
Use optional thicker (0.015”) graphoil
gasket
Use standard graphoil gasket as
shipped (0.010” thick)*
Use optional thicker (0.015”) graphoil
gasket
Use optional thinner (0.010”) graphoil
gasket
Use standard graphoil gasket as
shipped (0.015” thick)*
Use 2X optional thinner (for a total of
0.020”) graphoil gasket
Up to 120° F
(50° C)
120° F – 280° F
(50° C – 138° C)
Up to 120° F
(50° C)
120° F – 280° F
(50° C – 138° C)
Up to 70° F
(20° C)
70° F – 120° F
(20° C – 50° C)
120° F – 280° F
(50° C – 138° C)
Pumps with 3/8”ports
Pumps with 1/2”ports
Pumps with 1”ports
75 in.-lbs.
(8.5 N-m)
75 in.-lbs.
(8.5 N-m)
75 in.-lbs.
(8.5 N-m)
24436
23956
23982
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4089 (2/17)
*Standard Set-up
