Altecnic / Caleffi 253 Solar Series 253044 Pressure Safety Relief Valve 1/2" x 3/4" F x F 4 Bar female x female Description: Fixed swan neck tap

Description: Fixed swan neck tap with fixed serrated nozzles

Sizes: 1/2"

then the valve closes slowly to prevent pressure shock loads

Spares: Hand wheel Assembly - Pt No 960180

Altecnic / Caleffi Pressure Relief Valve Loose Nut Connection 4

Altecnic / Caleffi 253 Solar Series 253044 Pressure Safety Relief Valve 1/2" x 3/4" F x F 4 Bar female x female Description: Fixed swan neck tapDescription This is a stock item. Order by 5pm Monday to Thursday and 4. 30pm Friday for same day despatch. The Altecnic series 253 safety relief valves are used to control pressure in the primary circuits of solar heating systems. The valve is selected for the required set pressure. As the pressure rises, when the discharge pressure is reached the valve opens and discharges to atmosphere, preventing the pressure within the system reaching levels