DeZurik KGC-MC 사용 설명서 - 페이지 6
{카테고리_이름} DeZurik KGC-MC에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DeZurik KGC-MC 17 페이지. Metal cutting knife gate valves
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DeZURIK
KGC-MC METAL CUTTING KNIFE GATE VALVES
Installation
Install the valve between ASME Class 125 or Class 150
pipeline flanges, or other flanges that match valve end
connection. Flange gaskets are required. Before installation,
remove foreign material such as weld spatter, oil, grease, and
dirt from the valve and pipeline.
Cyclone or Gravity (Dry) Service Installations
When installing the valve in a vertical pipeline (such as a
cyclone hopper bottom, gravity flow, or other dry service
application), install the "SEAT" side of the valve facing
upstream as shown in Figure 3. Installing the valves with the
seat side upstream prevents process media buildup in the
seat and chest area of the valve. This orientation also allows
the seat to act as an integral deflection cone, protecting the
seat from wear.
Other Installations
Install the valve so that the side marked "SEAT" is on
the lower pressure side of the valve when the valve is
closed; the pipeline pressure will then help seal the
valve in the closed position.
General Guidelines
Observe the following points to prevent distortion of
the valve body and gate when the flange bolts are
tightened:
•
Align the mating pipeline flanges.
•
Select the length of the flange bolts so that the
bolts used in the blind holes near the chest
area of the valve do not bottom out when
tightened. We recommend using studs with
nuts in the blind holes.
•
Tighten the flange bolts evenly, in a crisscross
pattern. Refer to Table A for recommended
flange bolt/stud torques.
Note: All DeZURIK Recommended Torque values
may vary according to process conditions,
environment and type of lubricant used. Lubricated
torque values are 65% of dry values.
DO NOT over torque the flange bolts. This could
result in distortion of the chest, leading to seat
leakage, gate galling and inability to stroke the gate,
further leading to permanent gate and seat damage.
D11060
Figure 3 - Vertical Line/
Table A: Recommended Flange Bolt/Stud
Torque Range in ft-lbs (non-lubricated
Valve Size
3" (80mm)
4" (100mm)
5" (125mm)
6" (150mm)
8" (200mm)
10" (250mm)
12" (300mm)
14" (350mm)
16" (400mm)
18" (450mm)
20" (500mm)
24" (600mm)
Page 6
Hopper Bottom
ASME Gasket Types
Rubber with
Soft Elastomer
Soft Fabric
Gasket Shore
Filler, & 1/8"
Durometer <
Thick Hard
75A
37 - 41
14 - 16
26 - 29
11 - 12
41 - 45
22 - 24
41 - 45
22 - 24
55 - 61
35 - 39
56 - 62
40 - 44
80 - 88
59 - 65
107 - 118
81 - 89
103 - 114
79 - 87
128 - 141
102 - 112
123 - 136
99 - 109
188 - 207
155 - 171
November 2020
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