Caleffi A311501CST 6 Bar Pressure Relief Valve 3/4″ Loose Nut to 1/2″ BSP. The Caleffi range of safety relief valves are WRAS approved and are designed to protect hot water cylinders and boilers in domestic hot water and heating systems. Valves are set to a certain pressure (bar g) and when the system reaches this pressure the valve is designed to open to release the pressure ensuring the system does not exceed its maximum safety limits.

- Manufacturers Code : 311501
- Brand : Altecnic Caleffi
- Size: 1/2″ (15mm)
- Connections: F x Loose Nut
- Set Pressure: 6 Bar
- Discharge Pressure: 7.2 Bar
- Pre-Seating Pressure: 4.8 Bar
- Discharge Flowrate kg/hr: 248.8
- Max Boiler Rating: 144.6kW
- Max Static Pressure: 10 Bar
- Dimensions: D-30.00mm H-60.00mm