Capillary Valve End Connections

Capillary Valve End Connections. These valves are soldered to the mating pipe. The ends of the valve have a socket, machined to close tolerances to receive the plain-end pipe. The joint is made by the flow of solder by capillarity along the annular space between the socket and the outside of the pipe. Capillary ends are commonly used with copper tubing and confined to sizes 65mm and smaller. The high temperature use of capillary end valves is limited due to the comparatively low melting point of the solder.