Alemite 7716-D1 Manuel d'entretien - Page 5

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High-Pressure Measuring Control Valve

Overhaul

NOTE : Refer to Figure 2 and/or Figure 3

for component identiﬁcation on all overhaul

procedures.

Prior to performing any maintenance procedure, the

following safety precautions must be observed. Personal

injury may occur.

WARNING

Do not use halogenated hydrocarbon

solvents such as methylene chloride or 1,1,1-

trichlorethane in this valve. An explosion can

result when aluminum and/or zinc-plated parts

come in contact with halogenated hydrocarbon

solvents.

Release all pressure within the system prior to

performing any overhaul procedure.

• Disconnect the air supply line from the pump

motor.

• Into an appropriate container, operate the

control valve to discharge remaining pressure

within the system.

Never point a control valve at any portion of your

body or another person. Accidental discharge of

pressure and/or material can result in personal

injury.

Read each step of the instructions carefully. Make

sure a proper understanding is achieved before

proceeding.

Removal

Remove the control valve from its delivery line.

Disassembly

1. Clamp Valve Body ( 7 ) vertically in a soft-jaw vise with

the Inlet Handle facing upward.

2. Unscrew Extension ( 40 ) and Coupler ( 41 ) from the

Valve Body.

Inlet Handle

3. Unscrew Bushing ( 29 ) from Inlet Handle ( 28 ).

• Remove Gasket (30) from Bushing.

4. Unscrew Knurled Nut (34) from Stud (31).

Alemite Corporation

5. Remove Retaining Washer ( 33 ), Strainer ( 32 ), and the

Stud from the Bushing.

6. Unscrew the Inlet Handle from the Valve Body.

• Use a strap wrench or other suitable tool that will not

mar the surface of the Inlet Handle.

7. Remove O-Ring ( 27 ) from the Inlet Handle.

Valve Body

Lever and Valve Actuation Stem Travel Assembly

8. Remove Valve Guide ( 23 ) from the Valve Body.

• Use needle-nose pliers.

9. Remove Pin ( 38 ) from the Valve Body.

• Drive the Pin from the opposite of the knurled end

with a punch and hammer.

10. Remove Lever ( 24 ) from the Valve Body.

11. Remove Nut ( 36 ) and Setscrew ( 37 ) from the Lever as

required.

12. Unscrew Packing Screw (35) from the Valve Body.

13. Remove Valve Actuation Stem (39), Washer (14), and

Seal (13) from the Valve Body.

NOTE: The earlier units contain a leather

washer (not illustrated) that is no longer

required.

14. Unscrew Cap (18) from Retainer (15).

15. Remove Spring (17) and Washer (16) from the

Retainer.

16. Unscrew Nut (20) and Setscrew (19) from the Cap if

necessary.

17. Unscrew the Retainer from the Valve Body.

18. Remove the additional Washer (14), and Seal (13)

from the Valve Body.

Slide Valve and Seat Assembly

19. Remove the Slide Valve portion of Slide Valve and

Seat Assembly (22) from the Valve Body.

20. Remove Screws (26) and Lock Washers (25) that

secure the Seat to the Valve Body.

21. Remove the Seat and Gasket (21) from the Valve Body.

Adjusting Screw Assembly

22. Unscrew Plug (1) from the Valve Body.

• Remove O-Ring (2) from the Plug.

SER 7716-D1

Revision (11-95)