COMPONENT OPERTATION / Control Valve During Relief Operation: 1 2 3 HP T450-03-03-031 During Set Pressure Increasing Operation: 1 2 3 4 5 6 7 8 HP PF T450-03-03-032 LP 10 9 From Solenoid Valve Unit (SG) 1 - Orifice A 4 - Orifice B 7 - Spring 9 - Passage 2 - Sleeve 5 - Seat 8 - Piston 10 - Spring 3 - Main Poppet 6 - Pilot Poppet T3-3-21 4 5 6 7 8 LP 10 9 8 LP