Cast Iron steam bellow seal water control valve globe valve price pn16 Cast Iron steam bellow seal water control valve globe valve price pn16
One of the most frequent and serious problems valve face is gland leakage,results in wasted and increased plant downtime . Apart from the high cost of energy losses, Gland leakages can also cause serious environmental , ecological and health hazards to plant workers and personnel , Leakage of sensitive material can also constitude to a fire hazard , explosion, or damage to equipment by corrosive material . Air entering the pipeline could produce inflammable explosive or poisonous mixtures. Gland packed valves ofen demand continual maintenance in accessibility creating particular difficulties . The bellows complies to conditions at high temperatures and are capable of withstanding over 10,000 cycles without failure.
Technical specification
Design standard: DIN 3356
Face to face dimension: DIN 3202
Flanged ends: DIN 2543-2545
Test & inspection: DIN 3230
Main part materials
Performance specification
One of the most frequent and serious problems valve face is gland leakage,results in wasted and increased plant downtime . Apart from the high cost of energy losses, Gland leakages can also cause serious environmental , ecological and health hazards to plant workers and personnel , Leakage of sensitive material can also constitude to a fire hazard , explosion, or damage to equipment by corrosive material . Air entering the pipeline could produce inflammable explosive or poisonous mixtures. Gland packed valves ofen demand continual maintenance in accessibility creating particular difficulties . The bellows complies to conditions at high temperatures and are capable of withstanding over 10,000 cycles without failure.
Technical specification
Design standard: DIN 3356
Face to face dimension: DIN 3202
Flanged ends: DIN 2543-2545
Test & inspection: DIN 3230
Main part materials
NO. | Part name | Material |
1 | Body | GS-C25,GGG-40G,1.4401 |
2 | Seat | 1.4301,Stellite |
3 | Disc | 1.4021,1.4401+Stellite |
4 | Stem | 1.4021,1.4401 |
5 | Bellows | 1.4301,1.4401 |
6 | Gasket | Flexible Graphite+stainless steel |
7 | Bonnet | GS-C25,GGG-40G,1.4401 |
8 | Bolt | A193-B7,A193-B8 |
9 | Nut | A194-2H,A194-8 |
10 | Packing | Flexible graphite |
11 | Packing Gasket | 1.4021,1.4401 |
12 | Gland | 1C45,1.4401 |
13 | Locator | 1C25 |
14 | Pin | 1C35 |
15 | Stem nut | Alloy steel,Copper alloy |
16 | Handwheel | Carbon steel |
17 | Cap | 1C35 |
Nominal Pressure | PN | ||
Test Pressure | Strength test | 1.5PN | MPa |
Sealing test | 1.1PN | ||
Gas seal test | 0.6 | ||
-- | -- | ||
Suitable temp | -196ºC~600ºC |