Apply flame to valve at base of socket. Heat uniformly, sweeping flame from fitting to tube until flux on fitting becomes quite. Avoid excessive heating of valve.

• 在阀门的承插口底部进行加热。要均匀加热,从连接部到管道扫着火焰,直到连接件上的焊剂不会再发出吱吱声。要避免过度加热阀门。