Pressure compensated shear seal solenoid valve

A solenoid valve, comprising:

• a hydraulic section having a moveable piston for controlling fluid flow between a fluid supply and a controlled apparatus;
• a coil section moving said moveable piston between open and closed positions in response to an electrical signal;
• a manifold positioned between said coil section and said hydraulic section, said coil section and said hydraulic section secured to said manifold;
• said hydraulic section comprising:
• a valve body, said valve body having fluid supply and outlet ports on an end face;
• an inlet flange and an outlet flange secured to said valve body, each of said inlet and outlet flanges including a fluid port, said inlet flange fluid port communicating with said fluid supply port and said outlet flange fluid port communicating with said fluid outlet port;
• a piston disposed within said valve body, said piston having a central bore therethrough, said piston moveable between open and closed positions to control fluid communication between said fluid supply and outlet ports;
• a pair of shear seal rings sealingly disposed within said piston bore, said shear seal rings having a central bore therethrough;
• a supply seal plate and an outlet seal plate, said supply seal plate having a port therethough allowing fluid communication between said inlet flange fluid port and said shear seal rings central bore, said outlet seal plate having a port therethough allowing fluid communication between said outlet flange fluid port and said shear seal rings central bore;
• and
• said coil section comprising:
• a coil cover, said coil cover having a substantially cylindrical shape with a mounting flange disposed on one end;
• a solenoid section disposed within said coil cover, said solenoid section including an electrically operated coil, a fixed metal core and a moveable metal core axially positioned a predetermined axial distance from said fixed metal core, said fixed metal core sealed at one end to the interior of said coil cover;
• a pressure transfer cap arrayed on said coil cover on the opposite end from said mounting flange;
• a bore extending axially through said fixed metal core;
• a plunger positioned within said bore and extending from said bore a predetermined distance at either end, said plunger being impacted and moved by said moveable metal core when said electrically operated coil is energized;
• a flux ring encircling a portion of said moveable core and sealed thereto;
• and
• a pair of electrical leads supplying power to said electrically operated coil.