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Product Name:GB Bellows Seal Throttle Valve
GB Bellows Seal Throttle Valve
It is applicable to the cutting and connection of pipelines medium that are used in various industries such as flue gas uerification plant, gas supply pipeline, vacuum facilities, ammonia facilities, hot water, colding & freezing system, heating technology, steam system, chemical industry, pharmacy, chemical fertilizer, electric power industry etc. The nominal pressure can be fromm 1.0 Mpa to 16.0MPa and the working temperature can be reached to 350 Celsius degree.
 
Main Structural features
1. This product has logical strucure, reliable seal, excellent performance and nice design.
2. The seal surface is overlay welded with hard chrome ally material which is attrition resistant,  corrosion ressistant, has good friction resistant and long life.
3. The stem is quenched and tempered, and its surface is treated by nitriding treatment, thus it has good corrosion resistant and friction resistant.
4. It has double seal capability, thus is more reliable for zero leakage warranty.
5. The stem show the position indicator, thus it is clearer.

Technical specification
Structural formation
BB, BG, OS&Y
Driving maner
Handwheel or motor operated
Design standard
GB12235
Face to face
GB12221
Flange ends
GB/T9113, JB/T79, HG20596
Test and inspection
JB/T 9092, GB/T13927
 
Products performance specification
Nominal pressure
(Mpa)
Shell test (MPa)
Sealing test (MPa)
Suitable temperature
Suitable medium
1.6
2.4
1.76
No more than 350oC
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 WC1, WC6, WC9, C5 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
Bellows
1Cr18Ni9Ti, 304, 316, 304L, 316L
6
Gasket
Flexible graphite+stainless steel, PTFE
7
Bonnet
WCB WC1, WC6, WC9, C5 CF8, CF8M, CF3, CF3M
8
Bolt
0Cr18Ni9Ti, 0Cr18Ni12Mo2Ti 35CrMoV, 25Cr2MoV
9
Nut
0Cr18Ni9Ti, 0Cr18Ni12Mo2Ti 35CrMoV, 25Cr2MoV
10
Packing
Flexible graphite, PTFE
11
Gland
WCB WC1, WC6, WC9, C5 CF8, CF8M, CF3, CF3M
12
Yoke nut
ZQA19-4
13
Handwheel
WCB, QT400-18
 
Dimensions and weight for PN16 Nominal pressure
Size
mm
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
L
mm
130
150
160
180
200
230
290
310
350
400
480
600
730
850
980
H
mm
190
195
225
260
280
310
340
395
435
470
535
590
630
680
720
W
mm
120
140
140
180
200
220
260
280
300
340
400
450
450
500
500
Weight
KG
5
5
5.5
11
13.5
19
26
36
46
74
102
168
270
420
620
 
Dimensions and weight for PN25 Nominal pressure
Size
mm
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
L
mm
130
150
160
180
200
230
290
310
350
400
480
600
730
850
980
H
mm
190
195
225
260
280
310
340
395
435
470
535
590
630
680
720
W
mm
120
140
140
180
200
220
260
280
300
340
400
450
450
500
500
Weight
KG
5
5
5.5
11
14
20
27
37
48
77
105
172
310
520
690
 
Dimensions and weight for PN40 Nominal pressure
Size
mm
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
L
mm
130
150
160
180
200
230
290
310
350
400
480
600
730
850
980
H
mm
190
195
225
260
280
310
340
395
435
470
535
590
630
680
720
W
mm
120
140
140
180
200
220
260
280
300
340
400
450
450
500
500
Weight
KG
5
5
5.5
11
14.5
21
28
39
50
80
108
176
350
590
790
 
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