Pilot control valve for reciprocating pump

专利名称：Pilot control valve for reciprocating pump发明人：Elliott, Andrew C,Guccione, Ray A, Sr.申请号：EP03256199.5申请日：20031001公开号：EP1413750B1公开日：20061227

摘要：A pilot control valve for controlling a reciprocating pump having a valvemember shiftable within a valve body between a first or \"downstroke\" position and asecond or \"upstroke\" position. When the valve member is in its first position, the valvemember positions a pair of slide valves to allow communication of control fluid to thelower surface of a piston to move the piston from a first position to a second position. Asthe piston reaches its second position, a poppet disposed in a rod attached to the pistonallows control fluid acting on the valve member to depressurize. As such control fluid isdepressurized, pressurized control fluid acts on the valve member to move the valvemember from its first position to its second position. In its second position, the valvemember positions the pair of slide valves to block communication of the control fluid tothe lower surface of the piston and to allow communication of the control fluid to theupper surface of the piston causing the piston to return to its first position. As the pistonreturns to its first position, the poppet disposed in the piston rod allows the pressurizedcontrol fluid acting on the upper surface of the piston to act on the valve member tomove the valve member back to its first position. In its first position, the valve memberrepositions the pair of slide valves to block communication of the control fluid to theupper surface of the piston and allows communication of the control fluid to the lower

surface of the piston and the process is repeated.

申请人：CHECKPOINT FLUIDIC SYSTEMS INT

地址：US

国籍：US

代理机构：Fox-Male, Nicholas Vincent Humbert

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