Bellow Seal Stop Valve Acc. To DIN

Bellow Seal Stop Valve Acc. To DIN(pic 1)
Bellow Seal Stop Valve Acc. To DIN(pic 2)

Bellow seal stop valve acc. to DIN product structural features

Bellow seal stop valve acc. to DIN is applicable to the cutting and connection of pipelines medium that are used in various industries such as petroleum chemical industry, pharmacy, chemical fertilizer, electric power industry etc under nominal pressure of PN 1.6~16MPaand working temperature of 29~350℃.

Bellow seal stop valve acc. to DIN main 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 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 life, thus it is clearer.6、The part material,flange and butt weld end dimension may be selected according to current operating condition and users’ requirement, so that meeting the requirements of various engineering.

Bellow seal stop valve acc. to DIN 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 Bellow assemble 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 Hand wheel WCB、QT400-18
12 Bolt ASTM A193-B7、A193-B8、A193-B8M
13 Nut ASTM A194-2H、A194 -8、A194-8M
14 Gasket Flexible graphite + stainless steel、PTFE
Bellow Seal Stop Valve Acc. To DIN(pic 5)
Bellow Seal Stop Valve Acc. To DIN(pic 4)
Bellow Seal Stop Valve Acc. To DIN(pic 3)

Bellow seal stop valve acc. to DIN external and connection dimensions

Model WJ41H(F)-16
Pressure PN16
size 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
L 130 150 160 180 200 230 290 310 350 400 480 600 730 850 980
H 195 200 220 225 235 250 260 265 370 400 515 550 600 630 680
W 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 90 160 260 410 610
Model WJ41H(F)-25
Pressure PN25
size 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
L 130 150 160 180 200 230 290 310 350 400 480 600 730 850 980
H 195 200 220 225 235 250 260 265 370 400 515 550 600 630 680
W 130 130 130 130 150 150 180 180 200 200 400 450 450 500 500
Weight(kg) 4 4.5 5 7.5 9.5 13 19 24 43 57 95 168 300 510 680
Model WJ41H(F)-40
Pressure PN40
size 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
L 130 150 160 180 200 230 290 310 350 400 480 600 730 850 980
H 195 200 220 225 235 250 260 265 370 400 515 550 600 630 680
W 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

Bellow seal stop valve acc. to DIN technical specification

Structural formation BB-BG-OS & Y
Driving manner Hand-operated
Electric-actuated
Design standard DIN3356
Face to face DIN3202
Flange ends DIN2543-2545
Test & inspection DIN3230

NOTE:The size of serial, valve connecting flange can be design according to customers requirement.

Bellow seal stop valve acc. to DIN 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

Bellow seal eel pilot globe valve operation principle sketch

Bellow Seal Stop Valve Acc. To DIN(pic 6)

Bellow seal stop valve acc. to DIN operation principle

1.Normal close: disc metal to metal seal to the seat, forms a metal to metal seal totally stationary seal.
2.Throttle state: disc leave the seat, paro bala of disc has not been emptied completely, activate and throttle the fluid, meanwhile can sweep dusty on the seat, protect seat, extend valve life expectancy .
3.On-state: when disc is on-state, valve is under emptying, resistance of fluid reduces, shorten the of emptying enhance the effect of emptying.

Bellow seal stop valve acc. to DIN operation principle

Bellow Seal Stop Valve Acc. To DIN(pic 7)

Bellow seal stop valve acc. to DIN operation principle

1.Normal close: disc metal to metal seal to the seat, forms a metal to metal seal totally stationary seal.
2.Throttle state: disc leave the seat, paro bala of disc has not been emptied completely, activate and throttle the fluid, meanwhile can sweep dusty on the seat, protect seat, extend valve life expectancy .
3.On-state: when disc is on-state, valve is under emptying, resistance of fluid reduces, shorten the of emptying enhance the effect of emptying.

Bellow seal stop valve acc. to DIN operation principle

When used as a throttle valve, it presents a notable action of flow adjustment. The flow performance curvet a small flow adjustment is gentle (a gentle curve can also be designed for a big flow adjustment)so as to make the flow control easily.

Bellow Seal Stop Valve Acc. To DIN(pic 8)

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Catalog: Bellow Seal Valves

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