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Product Name:DIN Bellows Seal Globe Valve
DIN Bellows Seal Globe Valve
A valve with a bellows to seal off the stem enclosure is an ideal choice whenever leakage to the atmosphere is intolerable due to toxicity, chemical corrosion, radioactivity, other health or ecological reasons. In addition, seal welding the body-bonnet seal makes the valve hermetically sealed. The bellows is welded to the stem and to the bottom of the bonnet.
 
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
DIN 3356
Face to face
DIN 3202
Flange ends
DIN 2543-2545
Butt-welding
DIN 3239
Test and inspection
DIN 3230
 
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
 
Main parts materials
NO.
Part name
Material
1
Body
GS-C25 1.7363 1.4308, 1.4408, 1.4306, 1.4301
2
Disc
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304, F316, F321, F304L, F316L
3
Pin
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304, F316, F321, F304L, F316L
4
Bellows
1Cr18Ni9Ti, 304, 316
5
Stem
ASTM A182-Gr.F6a ASTM A182-F22 ASTM A182-F304, F316, F321, F304L, F316L
6
Bonnet
GS-C25 1.7363 1.4308, 1.4408, 1.4306, 1.4301
7
Packing
Flexible graphite, PTFE
8
Gland
GS-C25 1.7363 1.4308, 1.4408, 1.4306, 1.4301
9
Guide piece
25, 45, 304, 316
10
Yoke nut
ZQA19-4
11
Handwheel
WCB QT400-18
12
Bolt
ASTM A193-B7, A193-B7M, A320-B8, A193-B8M
13
Nut
ASTM A194-2H, A194-2HM, A194-8, A194-8M
14
Gasket
Flexible graphite+stainless steel, PTFE
 
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
195
200
220
225
235
250
260
265
370
400
515
550
600
630
680
W
mm
130
130
130
130
150
150
180
180
200
200
400
450
450
500
500
Weight
KG
4
4.5
5
7
9
12.5
18
23
41
54
90
160
260
411
610
 
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
195
200
220
225
235
250
260
265
370
400
515
550
600
630
680
W
mm
130
130
130
130
150
150
180
180
200
200
400
450
450
450
450
Weight
KG
4
4.5
5
7.5
9.5
13
19
24
43
57
95
168
300
510
680
 
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
195
200
220
225
235
250
260
265
370
400
515
550
600
630
680
W
mm
130
130
130
130
150
150
180
180
200
200
400
450
450
500
500
Weight
KG
4
4.5
5
8
10
13.5
20
25
45
60
98
171
340
580
780
 
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