Stainless Steel Safety Valves
A stainless safety valve is a threaded safety valve with a cast stainless body and metal-to-metal seat that relieves excess pressure in corrosive fluid and hygienic applications.
It is used on food, chemical, pharmaceutical, clean steam and aggressive fluid lines. The product range includes 1/2″ to 2″ models with 2–10.5 bar and 10.5–20 bar setting ranges.
Main Applications
- Food and beverage processes
- Chemical and pharmaceutical plants
- Clean steam lines
- Corrosive fluids
- Hygienic pressure vessels
- Seawater and outdoor use
Technical Data
| Connection | Male inlet, female outlet; same nominal size |
|---|---|
| Sizes | 1/2″, 3/4″, 1″, 1¼”, 1½”, 2″ |
| Setting ranges | 2–10.5 bar · 10.5–20 bar (by spring) |
| Max. working pressure | PN25 |
| Temperature | −20 / +185 °C (per material table) |
| Seat diameter | 13 mm (1/2″) … 50 mm (2″) |
| Body | Cast stainless CF8 |
| Reseat | Up to 10% below set for gases, 20% for liquids |
Material Options
| Part | PN25 · stainless body |
|---|---|
| Body | Cast stainless CF8 |
| Seat | AISI 304 / CF8 |
| Disc | AISI 304 / CF8 |
| Sealing | Metal-to-metal (AISI 304) |
| Stem | AISI 304 |
Which material? A metal-seated stainless valve resists high temperature and corrosion; for gas applications needing very tight shut-off, a soft-seated type should be considered. Values come from the manufacturer sheet.
Advantages
Corrosion Resistant
- CF8 body
Hygienic
- Food and pharma
Metal Seat
- Heat resistant
Two Setting Ranges
- 2–10.5 and 10.5–20 bar
Construction and Design Features
- Cast stainless body
- Stainless spring and stem
- Metal-to-metal disc and seat
- Lifting lever
Send the size, set pressure, fluid and capacity; we will confirm a suitable stainless safety valve from stock.
How to Choose?
- Size and connectionChoose the inlet thread size.
- SettingBase it on the protected vessel’s maximum pressure.
- FluidState corrosive or hygienic fluid.
- Seat typeChoose metal or soft seat.
Complementary Products
Why ORFA?
Other Threaded Safety Valves
Flame Arresters
Flame arresters stop flashback on flammable gas lines and protect the line and equipment.
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Bronze Safety Valves
Bronze safety valves have a bronze body and threaded ends and open to protect the system when the set pressure is exceeded.
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Compressor Safety Valves
Compressor safety valves release excess pressure in air compressors and receivers to protect the equipment.
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Brass Safety Valves
Brass safety valves have a brass body and threaded ends and protect heating and water systems against overpressure.
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Fixed-Set Safety Valves
Fixed-set safety valves open at a pressure set in the factory that cannot be changed.
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Water Heater Safety Valves
Water heater safety valves release excess pressure in water heaters and boilers to protect the appliance.
Details →Our Stainless Steel Safety Valves
ORFA supplies stainless steel safety valves in a range of pressure classes, sizes and connection types to suit your application. Descriptions, technical specifications, materials and dimension tables are available on each detail page.
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