Water Heater Safety Valves
Thermosiphon Safety Valve
A thermosiphon safety valve is a protective fitting installed on the cold water inlet of electric thermosiphons, boilers and solar water heaters; it relieves excess pressure created by expanding hot water and prevents backflow to the mains.
Supplied with 1/2″ threaded connection. With its diaphragm design and stainless steel spring, it operates in water up to 110 °C; opening pressure ranges from 7–10 bar. In manual-drain models, the valve can be opened by hand to empty and test the appliance. The body’s check valve prevents hot water from returning to the mains.
1/2″Threaded connection
7–10 barOpening pressure
110 °CMax. water temperature
Manual drainHand-operated emptying
Advantages
- Device protection against excess pressure
- Backflow prevention with check valve
- Hand-operated drain and test function
- Long service life with stainless steel spring
Applications
- Electric thermosiphons
- Boilers and hot water storage tanks
- Solar water heaters
- Mixer tap and combi boiler hot water circuits
Technical Specifications
| Connection | 1/2″ threaded |
|---|---|
| Opening pressure | 7 – 10 bar (model dependent) |
| Max. water temperature | +110 °C |
| Features | With check valve, manual drain option available |
Materials
| Body | Brass |
|---|---|
| Spring | AISI 304 stainless steel |
| Diaphragm | Elastomer |
Why ORFA?
Since 1985Over 40 years of experience in industrial plumbing equipment supply.
Technical AdviceSupport in selecting the correct valve for your line pressure and size requirements.
Stock DeliveryCommon sizes shipped from stock the same day.
Spare PartsSeals, packing and handle kits plus other valve spare parts from a single source.
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