Purpose
Parabola bellow stop valve ACC. to ANSI valve is applicable to the pipelines that are used in various industries such as petroleum, chemical industry, pharmacy, chemical fertilizer, electric power industry etc under nominal pressure of CLASS150-900LBS and working temperature of-29~350℃ as switch and the adjustment of fluid.
Structural features
1.This product has logical structure. reliable seal, excellent performance and nice design.
2.The seal surface is build-up welding with Co hard alloy. which is attrition-resistant, has good friction resistant and long life.
3.The stem is quenched and tempered, and its surface is treated by intruding treatment, thus it has good corrosion resistant and friction resistant.
4.It has double seal capability, thus is more reliable.
5.The stem may show the position of lift, thus it is clearer.
6.The part material, flange and butt weld end dimension may be selected according to current operating condition and users’ require-mint, so that meet the requirements of various engineering.
Technical specification
Structural formation: BB-BG-OS&Y
Driving manner: Hand-operated Electric-actuated
Design standard: AMSE B16.34、BS1873
Face to face: ASME B16.10
Flange ends: ASME B16.5
Test& inspection: API598
Products performance specification
|
Nominal pressure(LB)
|
Shell test(Mpa)
|
Sealing test(Mpa)
|
Suitable temp.(℃)
|
Suitable medium
|
|
150
|
3.0
|
2.2
|
≤350℃
|
Water oil& gas
|
|
300
|
7.5
|
5.5
|
|
600
|
15.0
|
11.0
|
|
900
|
22.5
|
16.5
|
Main parts materials
|
NO.
|
Part name
|
Material
|
|
1
|
Body
|
ASTM A216-WCB ASTM A351-CF8、CF8M、CF3、CF3M
|
|
2
|
Disc
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
3
|
Split ring
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
4
|
Disc bushing
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
5
|
Stem
|
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304、F316、F321、F304L、F316L
|
|
6
|
Gasket
|
Flexible graphite stainless steel
|
|
7
|
Bonnet
|
ASTM A216-WCB
ASTM A351-CF8、CF8M、CF3、CF3M
|
|
8
|
Bellow assemble
|
ASTM A182-F304、F316、F321、F304L、F316L
|
|
9
|
Packing
|
Flexible graphite
|
|
10
|
Gland
|
ASTM A216-WCB
ASTM A315-CF8、CF8M、CF3、CF3M
|
|
11
|
Yoke nut
|
ZQA19-4
|
|
12
|
Hand wheel
|
ASTM A536 Gr.60-40-18、A216-WCB
|
|
13
|
Guiding piece
|
25、45、304、316、304L、316L
|
|
14
|
Bolt
|
ASTM A193-B7、A193-B8、A193-B8M
|
|
15
|
Nut
|
ASTM A194-2H、A194-8、A194-8M
|
Main dimension and weight
|
Model
|
LFAWL41-150LB
|
|
Pressure
|
150LB
|
|
Size
|
mm
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
in
|
1/2
|
3/4
|
1
|
1 1/4
|
1 1/2
|
2
|
2 1/2
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
14
|
|
L
|
108
|
117
|
127
|
140
|
165
|
203
|
216
|
241
|
292
|
356
|
406
|
495
|
622
|
698
|
787
|
|
H
|
241
|
241
|
241
|
280
|
286
|
368
|
387
|
400
|
457
|
520
|
609
|
698
|
762
|
876
|
990
|
|
W
|
120
|
140
|
140
|
180
|
200
|
220
|
260
|
280
|
300
|
320
|
340
|
400
|
450
|
450
|
450
|
|
Weight
|
4
|
5
|
6
|
10
|
13
|
18
|
30
|
35
|
55
|
75
|
104
|
200
|
300
|
390
|
610
|
|
Model
|
LFAWL41-300LB
|
|
Pressure
|
300LB
|
|
Size
|
mm
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
in
|
1/2
|
3/4
|
1
|
1 1/4
|
1 1/2
|
2
|
2 1/2
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
14
|
|
L
|
152
|
178
|
203
|
215
|
229
|
267
|
292
|
318
|
356
|
400
|
444
|
559
|
622
|
711
|
762
|
|
H
|
241
|
241
|
283
|
320
|
322
|
399
|
438
|
450
|
584
|
610
|
660
|
762
|
850
|
1085
|
1187
|
|
W
|
120
|
140
|
140
|
180
|
200
|
220
|
260
|
280
|
300
|
320
|
340
|
400
|
450
|
450
|
450
|
|
Weight
|
6
|
7
|
10
|
15
|
20
|
25
|
30
|
52
|
88
|
115
|
160
|
259
|
420
|
595
|
876
|
Main dimension and weight
|
Model
|
LFAWL41-600LB
|
|
Pressure
|
600LB
|
|
Size
|
mm
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
in
|
1/2
|
3/4
|
1
|
1 1/4
|
1 1/2
|
2
|
2 1/2
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
14
|
|
L
|
165
|
190
|
216
|
229
|
241
|
292
|
330
|
356
|
432
|
508
|
559
|
660
|
787
|
838
|
889
|
|
H
|
240
|
280
|
320
|
320
|
390
|
430
|
480
|
508
|
635
|
750
|
914
|
1016
|
1219
|
1330
|
1560
|
|
W
|
140
|
140
|
160
|
160
|
180
|
180
|
250
|
250
|
350
|
400
|
450
|
500
|
600
|
720
|
760
|
|
Weight
|
7
|
10
|
16
|
22
|
29
|
35
|
50
|
90
|
150
|
230
|
300
|
510
|
850
|
1120
|
1400
|
|
Model
|
LFAWL41-900LB
|
|
Pressure
|
900LB
|
|
Size
|
mm
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
in
|
1/2
|
3/4
|
1
|
1 1/4
|
1 1/2
|
2
|
2 1/2
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
14
|
|
L
|
229
|
229
|
254
|
279
|
305
|
368
|
419
|
381
|
457
|
559
|
610
|
737
|
838
|
965
|
1029
|
|
H
|
280
|
330
|
350
|
430
|
508
|
569
|
430
|
635
|
774
|
860
|
1040
|
1330
|
1560
|
1650
|
1780
|
|
W
|
160
|
160
|
180
|
180
|
250
|
250
|
320
|
350
|
450
|
550
|
600
|
720
|
760
|
820
|
890
|
|
Weight
|
10
|
16
|
23
|
37
|
49
|
65
|
75
|
120
|
200
|
350
|
410
|
790
|
1300
|
1500
|
1800
|