Altecnic / Caleffi 309 Series Pressure & Temperature Relief Valve 1/2" 90°C 7 Bar - 309473CST 7 barg • Ratings align with BS

• Ratings align with BS EN 1092-2 PN16 (formerly BS 4504)

1/2" x 2" (DN40)

Connections: Male x Ø 22 mm with compression fitting for copper pipe

Discharge Rating: 25 kW

• Available with NPT thread: Fig

Altecnic / Caleffi 309 Series Pressure & Temperature Relief Valve 1/2" 90°C 7 Bar - 309473CST 7 barg • Ratings align with BSDescription This is a stock item. Order by 5pm Monday to Thursday and 4. 30pm Friday for same day despatch. The Altecnic Caleffi Series 309 Temperature & Pressure Relief Valve is designed to regulate and limit the temperature and pressure within domestic hot water storage heaters. It prevents the water from exceeding 100C and forming steam. When the pre set limits are reached, the valve safely discharges water into the atmosphere to restore pressure