AVK SEriES 57/46 & 57/86 rESiliEnt SEAtEd gAtE VAlVES
inStAllAtion, opErAtion & mAintEnAncE mAnuAl
4. maintenance
4.1 replacement of Handwheel
a) Remove nuts (16) from studs (19).
b) Lift gland follower (17) up and remove nuts (16) and washers (14). Then turn handwheel (21) clockwise until upper stem nut
(22)comes off assembly.
c) Place top half of stem nut (22) into new handwheel (21) and align with hexagon. The stem nut should fit neatly inside the
recess in the top of the handwheel.
Place the stem nut and handwheel assembly on top of yoke/anti friction washer assembly and align top half of stem nut
with the bottom half via the lugs.
note: the stem nuts will only go together one way as the lugs are different widths.
d) Thread handwheel (21) onto stem anti clockwise making sure that the yoke (18) bolt holes line up with the bonnet studs
(19) with no interference.
e) Thread handwheel (21) onto stem until the yoke (18) sits flush on top of the bonnet (9) with the wedge (3) raised from the
seat position.
f)
Lift gland follower (17) up and place washer (14) and nut (16) onto studs (19) to secure yoke (18) to bonnet (9).
g) Tighten nuts (16) that secure yoke (18) to bonnet (9), lower gland follower over studs (19) and place one washer (14) on top
of each stud (19).
h) Place a small amount of Loctite 680 Threadlocker onto the nuts that secure the gland follower (17).
i)
Place nuts onto studs and tighten evenly to fingertight.
j)
After pressurisation operate valve and check for weeping. Nip nuts (16) until weeping stops.
important: Ensure that valve operates smoothly and freely when opening and closing.
component list
1. Valve body
2. Wedge body
3. Wedge
4. Wedge nut
5. Pin
6. Stem
7. Bonnet bolt
8. Bonnet gasket
9. Valve bonnet
10. Hot melt
11. Gland bushing
12. O-ring
13. O-ring
14. Washer
15. Gland
16. Hexagon nut
17. Gland follower
18. Yoke
19. Stud bolt
20. Washer
21. Handwheel
22. Stem nut
21
20
19
18
17
16
15
13
12
11
10
9
8
7
6
5
4
3
2
1
14
22
AVK Valves Pty Ltd, 559A Grand Junction Road, Wingfield, SA 5013, Australia - T: +61 8 8368 0900 - E: [email protected] - W: www.avkcivil.com.au Version number 3
COPYRIGHT©AVK GROUP A/S 2017
pp. 5 of 6
