EATON-IH平衡阀产品介绍.pdf

Overcentre Valves Overcentre Valve Options Standard 1CE Part balanced 1CER Balanced 1CEB Counterbalanced 1CEL Zero Differential 1CPB 3 2 1 ATMOSPHERIC VENT Basic Valves - Overcentre Standard Basic Valves - Overcentre Pressure applied to valve port, check opens = Free flow to cylinder Pressure locked in cylinder by check = No flow Standard Pressure in cylinder exceeds relief setting, poppet opens = Relief flow from cylinder Pressure applied to pilot, poppet opens = Controlled flow from cylinder Basic Valves - Overcentre Part Balanced Basic Valves - Overcentre Pressure applied to valve port, check opens = Free flow to cylinder Pressure locked in cylinder by check = No flow Pressure in cylinder exceeds relief setting, poppet opens Note pressure in valve line is balance at area “A” “B” so does not effect the relief pressure = Relief flow from cylinder Pressure applied to pilot, poppet opens = Controlled flow from cylinder Part Balanced Basic Valves - Overcentre Fully Balanced Basic Valves - Overcentre Pressure applied to valve port, check opens = Free flow to cylinder Pressure locked in cylinder by check = No flow Pressure in cylinder exceeds relief setting, poppet opens Note. Relief setting and pilot pressure unaffected by pressure in the valve line = Relief flow from cylinder Pressure applied to pilot, poppet opens = Controlled flow from cylinder Fully Balanced Basic Valves - Overcentre Counterbalanced Basic Valves - Overcentre Pressure applied to valve port, check opens = Free flow to cylinder Pressure in cylinder exceeds relief setting, poppet opens = Relief flow from cylinder Pressure locked in cylinder by check = No flow Pressure applied to pilot, outer spring compressed = Controlled flow from cylinder, counterbalance pressure maintained Higher pressure applied to pilot, poppet opens = Controlled flow from cylinder Counterbalanced Basic Valves - Overcentre Zero Differential 3 2 1 ATMOSPHERIC VENT Basic Valves - Overcentre Pressure ap