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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 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 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 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.
