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SẢN PHẨM
SAFETY VALVES ASME I, ASME III AND ASME VIII
Regular flow safety valves
Safety valves for pressure relief in accordance to PED and DIN/EN.
The modern pressure safety valve for regular capacities.
- Cost-effective body design with seat bushing developed with the modular principle with other series.
- Smooth and stable behaviour thanks to comparatively low lift.
- Inner parts made of stainless steel (except spring and spring washer).
Product Specifications
Inlet sizes
Inlet pressure rating
- PN 10 to PN 40
Set pressures
- 0.1 bar”g to 40 bar”g
Temperature range
- -270°C to +450°C
Overpressure
- Vapours / gases: 5%
- Liquids: 10%
Blowdown
- Vapours / gases: 10%
- Liquids: 20%
Allowable built-up back pressure without bellows
- 20% of the set pressure
MODEL | Yes 9 |
DESIGN | Conventional with open bonnet |
DIMENSIONS | 1 1/2 "to 12" |
TARE PRESSURE | From 3 barg to 330 barg |
RATING | From 150x150 to 2500x600 |
TEMPERATURE RANGE | Up to 650ºC |
OVERPRESSURE |
3% |
CLOSING PRESSURE |
From 4% to 7% * |
STANDARD MATERIALS | SA-216 WCB (up to 427ºC) SA-217 WC9 (up to 590ºC) SA-217 C12A (up to 650ºC) |
Typical applications for the Si 9 safety valve series :
- Steam boilers
- Reheaters
- Power generation plants
- Industrial steam generation
- Steam systems and processes
* According to ASME Sec. I, under ideal operating conditions (pure steam, new valves, constant working conditions, 0 vibrations, etc.) the closing pressure or blow down should be 4%. In real operating conditions however, the closing pressure value can reach 7%
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