Bronze Safety Valves
A bronze safety valve is a threaded cast bronze safety valve that opens against spring force at the set pressure, relieving excess pressure on steam, gas or liquid lines.
It is used on steam boilers, compressor receivers, calorifiers and pressurised water circuits. The product range includes 1/2″ to 2″ models with 2.1–10.5 bar and 10.5–20 bar setting ranges.
Main Applications
- Steam boilers
- Compressor and air receivers
- Calorifiers and hot water tanks
- Pressurised water circuits
- Gas lines (depending on model)
- Process vessels
Technical Data
| Connection | Male inlet, female outlet; same nominal size |
|---|---|
| Sizes | 1/2″, 3/4″, 1″, 1¼”, 1½”, 2″ |
| Setting ranges | 2.1–10.5 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″) |
| Relief, 11–20 bar, gas/steam | 1/2″: 112–195 kg/h · 2″: 1,650–2,891 kg/h |
| Relief, 11–20 bar, water | 1/2″: 1,638–2,208 kg/h · 2″: 24,240–32,640 kg/h |
| Reseat | Up to 10% below set for gases, 20% for liquids |
| Height / weight | 145 mm, 0.52 kg (1/2″) … 283 mm, 2.0 kg (2″) |
Material Options
| Part | PN25 · bronze body |
|---|---|
| Body | Cast bronze |
| Seat | Forged brass |
| Disc | Forged brass |
| Soft seal | PTFE |
| Stem | Brass |
Which material? A safety valve is set by the maximum allowable pressure of the protected equipment, and its relief capacity must meet the boiler or compressor capacity. Values come from the threaded safety valve manufacturer sheet.
Advantages
Bronze Body
- Resists steam and water
Two Setting Ranges
- 2.1–10.5 and 10.5–20 bar
High Relief
- Capacity table
Lever Test
- Manual lifting
Construction and Design Features
- Cast bronze body
- Spring and adjusting screw
- PTFE soft-seated disc
- Lifting lever
Send the size, set pressure, fluid and required relief capacity; we will confirm a suitable bronze safety valve from stock.
How to Choose?
- Size and connectionDetermine the inlet thread size.
- Set pressureChoose the setting by the equipment maximum pressure.
- Fluid and capacityCheck relief capacity for steam, gas or water.
- MaterialChoose bronze or stainless body.
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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Compressor Safety Valves
Compressor safety valves release excess pressure in air compressors and receivers to protect the equipment.
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Stainless Steel Safety Valves
Stainless steel safety valves have a stainless steel body and threaded ends and protect against overpressure.
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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.
Details →
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 Bronze Safety Valves
ORFA supplies bronze 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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