Purpose
Bellow throttle valve acc. to GB is applicable to the pipelines that are used in various industries such as petroleum, chemical industry, pharmacy, chemical fertilizer, electric industry etc under nominal pressure of PN1.6~16MPa 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, corrosion-resistant, has good friction resistant and long life.
3.The stem is quenched and tempered, and its surface is treated by nit riding 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 user’s requirement, so that meet the requirements of various engineering.
Technical specification
Structural formation: BB-BG-OS&Y
Driving manner: Hand-operated Electric-actuated
Design standard: GB12235
Face to face: GB12221
Flange ends: GB9113、JB/T9092、GB/T13927
Test & inspection: JB/T9092、GB13927
Products performance specification
|
Nominal pressure(Mpa)
|
Shell test (Mpa)
|
Sealing test (Mpa)
|
Suitable temp. (℃)
|
Suitable medium
|
|
1.6
|
2.4
|
1.76
|
≤350℃
|
Water oil& gas
|
|
2.5
|
3.75
|
2.75
|
|
4.0
|
6.0
|
4.4
|
|
6.4
|
9.6
|
7.04
|
Main parts materials
|
NO.
|
Part name
|
Material
|
|
1
|
Body
|
WCB、CF8、CF8M、CF3、CF3M
|
|
2
|
Disc
|
25、1Cr13、2Cr13、1Cr18Ni9Ti、 0Cr18Ni12Mo2Ti、20Cr1Mo1V、25Cr2MoV
|
|
3
|
Disc bushing
|
25、1Cr13、2Cr13、1Cr18Ni9Ti、 0Cr18Ni12Mo2Ti、20Cr1Mo1V、25Cr2MoV
|
|
4
|
Stem
|
25、1Cr13、2Cr13、1Cr18Ni9Ti、 0Cr18Ni12Mo2Ti、20Cr1Mo1V、25Cr2MoV
|
|
5
|
Bellow assemble
|
1Cr18Ni9Ti、304、316、304L、316L
|
|
6
|
Gasket
|
Flexible graphite + stainless steel、PTFE
|
|
7
|
Bonnet
|
WCB、CF8、CF8M、CF3、CF3M
|
|
8
|
Bolt
|
0Cr18Ni9Ti、0Cr18Ni12Mo2Ti、35CrMoV、25Cr2MoV
|
|
9
|
Nut
|
0Cr18Ni9Ti、0Cr18Ni12Mo2Ti、35CrMoV、25Cr2MoV
|
|
10
|
Packing
|
Flexible graphite、PTFE
|
|
11
|
Gland
|
WCB、CF8、CF8M、CF3、CF3M
|
|
12
|
Yoke nut
|
ZQA19-4
|
|
13
|
Hand wheel
|
WCB QT400-18
|
Main dimension and weight
|
Model
|
LFGWL41-16
|
|
Pressure
|
PN16
|
|
Size
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
650
|
750
|
850
|
|
H
|
190
|
195
|
225
|
260
|
280
|
310
|
340
|
395
|
435
|
470
|
535
|
590
|
630
|
680
|
720
|
|
W
|
130
|
130
|
150
|
180
|
200
|
220
|
280
|
300
|
320
|
350
|
400
|
500
|
550
|
600
|
700
|
|
Weight
|
5
|
5
|
5.5
|
11
|
13.5
|
19
|
26
|
36
|
46
|
74
|
102
|
168
|
270
|
420
|
620
|
|
Model
|
LFGWL41-25
|
|
Pressure
|
PN25
|
|
Size
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
650
|
750
|
850
|
|
H
|
190
|
195
|
225
|
260
|
280
|
310
|
340
|
395
|
435
|
470
|
535
|
590
|
630
|
680
|
720
|
|
W
|
130
|
130
|
150
|
180
|
200
|
220
|
280
|
300
|
320
|
350
|
400
|
500
|
550
|
600
|
700
|
|
Weight
|
5
|
5
|
5.5
|
11
|
14
|
20
|
27
|
37
|
48
|
77
|
105
|
172
|
310
|
520
|
690
|
|
Model
|
LFGWL41-40
|
|
Pressure
|
PN40
|
|
Size
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
|
L
|
130
|
150
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
400
|
480
|
600
|
650
|
750
|
850
|
|
H
|
190
|
195
|
225
|
260
|
280
|
310
|
340
|
395
|
435
|
470
|
535
|
590
|
630
|
680
|
720
|
|
W
|
130
|
130
|
150
|
180
|
200
|
220
|
280
|
300
|
320
|
350
|
400
|
500
|
550
|
600
|
700
|
|
Weight
|
5
|
5
|
5.5
|
11
|
14.5
|
21
|
28
|
39
|
50
|
80
|
108
|
176
|
350
|
590
|
790
|
WJ61H-40C WJ61H -40C WJ61H-40C
WJ61W-40P WJ61W -40P WJ61W-40P
Main structure and connection size
|
Dn (mm)Nominal
|
Ruler Inch(mm)
|
|
L
|
H
|
D
|
D1
|
D0
|
l
|
L1
|
∝
|
|
10
|
130
|
175
|
28
|
18.4
|
130
|
10
|
18
|
|
|
15
|
130
|
180
|
34
|
22.5
|
130
|
10
|
18
|
|
|
20
|
150
|
185
|
40
|
28.5
|
130
|
11
|
18
|
|
|
25
|
160
|
190
|
48
|
34.5
|
150
|
12
|
20
|
|
|
32
|
180
|
200
|
56
|
43
|
180
|
14
|
22
|
|
|
40
|
200
|
210
|
64
|
49
|
200
|
15
|
25
|
|
|
50
|
230
|
220
|
85
|
61
|
220
|
18
|
28
|
|
|
65
|
290
|
290
|
82
|
|
280
|
|
|
37°30′
|
|
80
|
310
|
360
|
95
|
|
300
|
|
|
37°30′
|
|
100
|
350
|
380
|
117
|
|
320
|
|
|
37°30′
|
|
125
|
400
|
410
|
143
|
|
350
|
|
|
37°30′
|
|
150
|
280
|
460
|
172
|
|
400
|
|
|
37°30′
|
|
200
|
600
|
520
|
223
|
|
500
|
|
|
37°30′
|
|
250
|
650
|
670
|
278
|
|
550
|
|
|
37°30′
|
|
300
|
750
|
740
|
329
|
|
600
|
|
|
37°30′
|