Function D10 - 1:1 area ratio
The pressure relief function is obtained by using a model D10 or C10F (1:1 area ratio) insert poppet and either a model C or C3 cover. Zero leak function to have no leakages from pilot to B line is also available using D10Z & C10FZ (ratio 1:1) spool. The C3 cover includes a mounting pad for a pilot valve with an ISO 4401, size 03 (ANSI/B93.7M-D03) interface. Single or double solenoid pilot valves are applicable. A model CVGC-3 module is available for use with dual solenoid pilot valves to obtain two pressure settings and a vent (both solenoids deenergized) condition.
Type D10 has no internal orifice and requires pilot connection A to X to be made in the manifold block.
Type D10 insert has good response combined with low shock characteristics and is recommended for general use.
Operation of both types D10 and C10F is similar: System pressure at A(P) is determined by manual pilot adjustment. Orifices in AP and X ports dampen poppet reaction time, preventing instability. Connecting port Z1 to tank (via an appropriate remote control valve) vents the system pressure at port A(P) to a level equivalent to insert poppet spring load plus override pressure.