Abstract: Instrumentality for use in multiple spool control valve assemblies including a high pressure pilot operated relief valve that exhausts fluid from the chamber being protected through a pair of exhaust passages simultaneously. A pressure responsive flow restricting valve maintains a constant pressure differential on the control spools across the open center flow passages of open center valves. A low pressure regeneration circuit includes provisions for preventing excessive pressure and consequent seal blow-out in the return passages of a control valve assembly. Each of these instrumentalities is capable of being disposed in an end plate section of universal configuration for section control valve asssemblies.