Viking K-825 Benutzerhandbuch

SECTION TSM 845

ISSUE

PAGE 12 OF 14

VALVE - AS, AK AND AL SIzES

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

DANGER !

Before opening any Viking pump liquid

chamber (pumping chamber, reservoir,

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.

(See detailed procedure for venting

the pumps, pages 4, 5 and 6).

2. That the driving means (motor,

turbine, engine, etc.) has been

“locked out” or made otherwise non-

operational so that it cannot be

inadvertently started while work is

being done on the 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 RELIEF VALVE

DISASSEMBLY: RELIEF VALVE

ASSEMBLY: RELIEF VALVE

PRESSURE ADJUSTMENT

IMPORTANT

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 Figure 3, page 2.

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

adjustment operation

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

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 23.

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

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.

FIGURE 23