unseated with supply valve seat 36 supply valve seat 36 is annular coaxial with valve axis a and formed between working port 28 and inlet port 26 to be small in diameter than ball 34 in order to retain ball 34 within inlet port 26 ball retainer 38 may be provided ball retainer 38 may be secured for example by press fit or welding within an enlarged portion of inlet port 26 a reduced diameter section of ball retainer 38 may extend further into inlet port 26 to prevent ball 34 from escaping inlet port 26 while still allowing for axial movement of ball 34 relative to supply valve seat 36 to allow for desired flow and or pressure from fluid source 14 to working device 16 when ball 34 is not seated with supply valve seat 36 hydraulic subassembly 12 is also provided with poppet rod 40 in order transfer linear motion produced by solenoid subassembly 18 to ball 34 to selectively seat and unseat ball 34 with supply valve seat 36 poppet rod 40 is coaxial with valve axis a and sized to extend through supply valve seat 36 such that a clearance is formed radially outward of poppet rod 40 to allow fluid communication radially between hydraulic subassembly housing 22 and poppet rod 40 from inlet port 26 to working port 28 when ball 34 is unseated with supply valve seat 36 when ball 34 is to be unseated with supply valve seat 36 poppet rod tip 42 contacts ball 34 and urges ball 34 away from supply valve.