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Description
There are three types bonnet design also for screwed forged steel gate valve, they are bolted bonnet, welded bonnet and pressure seal bonnet, but the bolted bonnet type be used usually. The structure are as bellow picture:
ConstructionFP or RP (Full port or reduced port), outside screw and yoke (OS&Y)Two piece self-aligning packing gland.Integral backseatScrewed end confirm to ASME B1.20.1
Application standard 1, design & manufacturer according to : API 602; BS5352;ASME B16.342, Threaded end dimension confirm to ANSI B1.20.13, Inspection and test confirm to API 5984, main material : A105;LF2;F5;F11;304(L);316(L);F347;F321;F51;Monel;20#alloy steel etc which confirm to ANSI/ASTM.5, pressure grade : 800 class, 1500 class, 2500 class
Dimension for 800 class (Bolted bonnet type )
Threaded ends design confirm to API 602
Specification
R.P
-
1/2''
3/4''
1''
1 1/4''
1 1/2''
2''
2 1/2''
F.P
1/4''
3/8''
1/2''
3/4''
1''
1 1/4''
1 1/2''
2''
Face to face
L
79
79
92
111
120
120
140
178
Hand wheel diameter
w
100
100
100
125
160
160
180
200
Height
H
161
161
163
196
223
251
290
333
Flow port dimension
d
8
10.5
13.5
18
24
29
36.5
45
Weight(kg)
2.3
2.22
2.39
4.24
5.7
7.05
10.9
16.8