Caleffi 309473 CST 1/2″ Series 309 Pressure & Temperature Relief Valve 90°C 7 Bar
The Caleffi 309473 CST 1/2″ Series 309 Pressure & Temperature Relief Valve is an essential safety component for unvented hot water systems. Factory set at 90°C and 7 Bar, this valve prevents water from reaching boiling point by discharging excess pressure and temperature. A WRAS-approved product, it ensures reliable protection and compliance with safety standards.
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- Estimated Delivery: Orders placed before 2pm on working days will be dispatched Fast DELIVERY with 1st class service.
- For boilers: Dispatch will occur on the next working day, but we will always aim for the fastest possible turnaround.
The Caleffi 309473 CST Series 309 Pressure & Temperature Relief Valve is specifically engineered to maintain the safety and efficiency of unvented hot water storage systems. Designed to prevent the water temperature from exceeding 100°C, this valve is set to discharge water at 90°C or when the pressure reaches 7 Bar.
With a 1/2″ connection size, this valve is compact, reliable, and easy to install, making it suitable for domestic systems. Its WRAS certification ensures compliance with UK water regulations, providing peace of mind for installers and homeowners alike.
Key Features:
- Dual Protection: Releases water when temperature exceeds 90°C or pressure exceeds 7 Bar.
- WRAS Approved: Certified for safe and compliant use in domestic systems.
- High-Quality Construction: Engineered for durability and long-lasting performance.
- Compact Design: Easy installation with a 1/2″ connection size.
- Efficient Performance: Prevents overheating and over-pressurization, ensuring system safety.
Applications:
- Designed for use in unvented hot water storage systems.
- Suitable for domestic storage cylinders to maintain safe operating conditions.
Technical Specifications:
| Feature | Details |
|---|---|
| Brand | Caleffi |
| Product Code | 309473 CST |
| Connection Size | 1/2″ |
| Temperature Setting | 90°C |
| Pressure Setting | 7 Bar |
| Maximum Pressure | 10 Bar |
| Medium | Water |
| Discharge Rating | 10kW |
| PED Category | IV |
| Approval | WRAS Approved |
| Manufacturer Code | 309473 CST |
Why Choose the Caleffi 309473 CST Valve?
The Caleffi 309473 CST Pressure & Temperature Relief Valve offers unmatched safety and performance for unvented hot water systems. Its dual functionality and WRAS approval make it a trusted choice for ensuring system efficiency and compliance.
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