Emerson KGA Installation And Maintenance Instructions Manual page 14

Clarkson Slurry Knife Gate ValVeS
KGA+
11. apply a small amount of recommended
lubricant to the two tapered faces of the
'sharp end' of the gate.
12. Press the gate firmly through the secondary
seal into the valve housing assembly until
the mark drawn on the gate reaches the
top of the retainer plate or gate reaches
approximately dimension a, table 5,
figure 13.
13. fully tighten all the retainer fasteners.
14. reinstall the actuator / frame assembly
with the housing / frame fasteners loosely.
15. reconnect the gate to the actuator. (in order
to facilitate installation and future removal,
a coating or anti-seize compound should be
applied to the outside of the clevis pin over
the yoke contact area.)
16. 'Stretch' the frame / actuator assembly
with respect to the housing by pulling (not
lifting) the frame / actuator assembly to
its maximum movement away from the
housing assembly (holding housing in place
if valve is removed from pipeline). tighten
the frame / housing bolts and verify the
tightness of the actuator to frame bolts.
table 5
Valve size
nps dn
3 80
4 100
6 150
8 200
10 250
12 300
14 350
16 400
18 450
20 500
24 600
26 650
30 750
36 900
42 1050
48 1200
54 1350
60 1500
17. Cycle valve to full open position and check
the gate position using the data in the
table 5, figure 13. adjust as required.
18. rattle the gate. it should be mostly
disengaged from the sleeves. the outboard
edges of the gate should be free and the
center still partially engaged in between the
sleeves.
19. Cycle gate full closed and full open.
20. inspect gate for pieces of rubber. if
significant amount of rubber is present, a
sharp edge(s) on the gate may be causing
seal damage or the gate is extending too
far on the up stroke. the ends of the gate
should be free and the center still engaged.
if the sleeve / gate is misaligned, loosen the
frame actuator bolts and / or adjust the yoke
until the proper position, open and closed,
is obtained.
21. reinstall the valve, refer to lifting section.
'a'
inch mm
1.59 40.39
1.53 38.86
1.52 38.61
1.59 40.39
1.46 37.08
2.12 53.85
2.18 55.37
2.44 61.98
5.06 128.52
4.26 108.20
5.34 135.64
4.00 101.60
4.75 120.65
4.75 120.65
6.62 168.15
6.49 164.85
5.73 145.54
8.00 203.20
'b'
inch mm
5.22 132.59
6.28 159.51
8.77 222.76
10.59 268.99
12.59 319.79
15.30 388.62
17.18 436.37
19.82 503.43
24.31 617.47
26.01 660.65
32.34 821.44
33.00 838.20
37.75 958.85
43.75 1111.25
52.62 1336.55
58.00 1473.20
63.23 1606.04
70.50 1790.70
fiGure 13
Dimensional tolerance:
nPS 3 - 10 (Dn 80 - 250)
nPS 12 - 16 (Dn 300 - 400)
nPS 18 - 26 (Dn 450 - 650)
nPS 30 - 60 (Dn 750 - 1500)
Dimension a = Distance from top of valve
housing (not wiper plate) to top
of gate in the closed position.
Dimension B = Distance from top of valve
housing (not wiper plate) to top
of gate in the opened position.
'a'
'B'
+/- " (1.5 mm)
1 /
16
+/- " (2.4 mm)
/
3
32
+/-⅛" (3 mm)
+/-¼" (6 mm)
14