Bellow seal stop valve acc. to DIN

Bellow Seal Stop Valve Acc. To DIN

Bellow seal stop valve acc. to DIN structures characteristics

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 petroleumchemical industry, pharmacy, chemical fertilizer, electric power industry etc under nominal pressure ofPN 1.6～16MPaand working temperature of 29～350℃.

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 construction

1.Normal close :disc metal to metal seal to the seat, form a metal to metal seal, toting stationary seal.
2.Pilot state: Torque of above DN200 glove valve is relatively large, pilot state performance: first open the valve, close the drain velidt make the toque small, when operate the valve.
3.On-state: when dual disc is on-state, valve is shorten the time of einptging,

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.

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.

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