Altecnic / Caleffi 309 Series Pressure & Temperature Relief Valve 1/2" 90°C 10 Bar - 309400CST
The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309400CST is designed to effectively control and limit the temperature and pressure of hot water in domestic storage heaters. This essential safety valve ensures that water temperatures do not exceed 100°C, preventing steam formation. When the temperature or pressure reaches its set limits, the valve releases a sufficient amount of water into the atmosphere, ensuring that both temperature and pressure return to safe operating levels.
**How It Works:**
The valve features a thermostat compound within the temperature sensor that is submerged in the hot water storage heater. As the temperature increases, the compound expands, moving a thrust pin that activates the obturator, thereby opening the valve. This mechanism is set to initiate opening at temperatures exceeding 90°C. Regarding pressure, the obturator, which is countered by a spring, lifts when the pressure reaches its designated limit, fully opening the outlet. The pressure setting is predetermined based on the system's maximum permissible pressure. As the temperature and pressure decrease, the valve automatically re-closes within the specified tolerances.
**Product Specifications:**
- Size: 1/2"
- Connections: Male x Ø 15 mm with compression fitting for copper pipe
- Materials: DZR
- Medium: Water
- Set Pressure: 10 Barg
- Discharge Rating: 10 kW
- Temperature Setting: 90°C
- Probe Length: 102mm
- Product Code: 309400CST
**Notes:** WRAS approved, CE marked
This high-quality pressure and temperature relief valve is an indispensable component for maintaining the safety and efficiency of your domestic hot water system. Ensure optimal performance and compliance with regulations by choosing the Altecnic / Caleffi 309 Pressure & Temperature Relief Valve.
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SPECIAL FEATURES
- Robust cast iron body with flanged end connections (type GFLA)
- Durable cast iron body with internal threaded end connections (type GMLA)
- Chrome-plated plug for extended lifespan
- Optimised characteristics for effective supply water temperature control
- Corrosion-protected and resistant to blocking
- Reliable mounting for electrical actuators
- Clear position indicator for easy monitoring
- Extensive range of flow rates compatible with suitable actuators
Product Codes:
DR152GMLA, DR15GMLA, DR20GFLA, DR20GMLA, DR20MA, DR25GFLA, DR25GMLA, DR32GFLA, DR32GMLA, DR40GFLA, DR40GMLA, DR50GFLA, DR65GFLA, DR80FA, DR80GFLA, DR100GFLA, DR125GFLA, DR150GFLA, DR200GFLA, DR200GFLA1
Flowstar (UK) Ltd
Wiltshire Road, Kingston-upon-Hull, East Riding of Yorkshire, HU4 6PA, United Kingdom
Flowstar (UK) Ltd is a leading global supplier of safety, relief, and reducing valves. With strong partnerships across major manufacturers, we deliver precise, reliable valve solutions tailored to your needs. Email enquiries to sales@flowstar.co.uk or call us on +44 (0)1482 601030.