SECTION TSM 630 ISSUE J PAGE 9 OF 10
PRESSURE RELIEF VALVE
INSTRUCTIONS
VALVE - LIST OF PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet
FIGURE 11 - SIZES G, H AND HL
VALVE - LIST OF PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet 10. Bonnet Gasket
FIGURE 12 - SIZES K, KK, L, LQ AND LL
DISASSEMBLY
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve
adjusting cap fitting, etc.) Be sure:
1. That any pressure in the chamber has been
completely vented through the suction or
discharge lines or other appropriate openings
or connections.
2. That the driving means (motor, turbine,
engine, etc.) has been “locked out” or made
non-operational so that it cannot be started
while work is being done on pump.
3. That you know what liquid the pump has been
handling and the precautions necessary to
safely handle the liquid. Obtain a material
safety data sheet (MSDS) for the liquid to be
sure these precautions are understood.
Failure to follow above listed precautionary
measures may result in serious injury or death.
Mark valve and head before disassembly to insure proper
reassembly.
1. Remove valve cap.
2. Measure and record length of extension of adjusting
screw. Refer to “A” on Figure 11 and Figure 12.
3. Loosen locknut and back out adjusting screw until spring
pressure is released.
4. Remove bonnet, spring guide, spring and poppet from
valve body. Clean and inspect all parts for wear or
damage and replace if necessary.
If a new spring is installed or if pressure setting of pressure
relief valve is to be changed from that which the factory has
set, the following instructions must be carefully followed.
1. Carefully remove valve cap which covers adjusting screw.
Loosen locknut which locks adjusting screw so pressure
setting will not change during operation of pump.
2. Install a pressure gauge in discharge line for actual
adjusting operation.
3. Turn adjusting screw in to increase pressure and out to
decrease pressure.
4. With discharge line closed at point beyond pressure
gauge, gauge will show maximum pressure valve will
allow while pump is in operation.
PRESSURE ADJUSTMENT
Reverse procedures outlined under Disassembly. If valve
is removed for repairs be sure to replace in same position.
Relief valve adjusting screw cap must always point towards
suction side of pump. If pump rotation is reversed, remove
relief valve and turn end for end.
ASSEMBLY
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