These valves permit the passage of flow either inlet 1 or 2 to the outlet port whilst shutting of the inlet port not in use.The shutting off,of an inlet is achieved by a floating ball bearing which moves by the pressure of the flow.           
• 此阀不能与焊接接管或24°锥面O型圈密封的锥管连接。
通流方向：   D1→D3时D2关闭   D2→D3时D1关闭 
Material : steel 
Temperature range without pressure reductions: -40 ℃ up to +120 ℃
Leakage rate for alternating valves(hydraulic test with test pressure = Pmax : approx.20 drops(test period of 1 minute).