Assembly, Disassembly, Pressure adjustment important – Viking Pump TSM312: G-N 32/432 User Manual

Page 10

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SECTION TSM 312

ISSUE

G

PAGE 10 OF 11

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 Figures 16, 17 and 18, page 8.

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 as necessary.

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.

Refer to Figures 1, 2,

and 4, page 1.

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. Install a pressure gauge in discharge line for actual

adjustment operation. Do not deadhead pump for more

than 30 seconds at a time.

2. Carefully remove valve cap which covers adjusting

screw.
Loosen locknut which locks adjusting screw so pressure

setting will not change during operation of pump.

3. Turn adjusting screw in to increase pressure and out to

decrease pressure.

4. With discharge line closed at a point beyond pressure

gauge, gauge will show maximum pressure valve will

allow while pump is in operation.

In ordering parts for pressure relief valve, always give

model number and serial number of pump as it appears on

nameplate and name of part wanted. When ordering springs,

be sure to give pressure setting desired.

aSSEMBLY

DaNgER !

Before starting pump, be sure all drive

equipment guards are in place.
Failure to properly mount guards may

result in serious injury or death.

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.

PRESSURE aDJUSTMENT

IMPORTaNT

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