Reducing/Relieving Cartridges

Reducing/relieving cartridges add the function of a full-flow pressure relief valve from the reduced pressure port 1 to drain/tank port 3. This feature allows the reduced pressure at port 1 to remain relatively constant under back flow conditions. 

Sun Hydraulics reducing/relieving cartridges are available in both 3- and 4-port versions with flow rates up to 80 gpm (320 L/min) and offer several mounting options.

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  • Functionally interchangeable with one another (same flow path, same cavity for a given frame size)
  • Five sizes, flow rates up to 80 gpm (320 L/min.)
  • Fully adjustable up to and including 4500 psi (315 bar) with inlet pressures up to 5000 psi (350 bar) (except air piloted versions)
  • Reducing/relieving cartridges are offered in both three- and four-port configurations

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Symbol Description Model Capacity Cavity
 
Pilot operated, pressure reducing/relieving valve Pilot operated, pressure reducing/relieving valve PPBB 5 gpm20 L/min. T-163A
PPDB 10 gpm40 L/min. T-11A
PPFB 20 gpm80 L/min. T-2A
PPHB 40 gpm160 L/min. T-17A
PPJB 80 gpm320 L/min. T-19A
 
Pilot operated, pressure reducing/relieving valve with drilled piston orifice Pilot operated, pressure reducing/relieving valve with drilled piston orifice PPDF 10 gpm40 L/min. T-11A
PPFF 20 gpm80 L/min. T-2A
PPHF 40 gpm160 L/min. T-17A
PPJF 80 gpm320 L/min. T-19A
 
Air-controlled, pilot operated, pressure reducing/relieving valve Air-controlled, pilot operated, pressure reducing/relieving valve PPFC 20 gpm80 L/min. T-2A
PPHC 40 gpm160 L/min. T-17A
PPJC 80 gpm320 L/min. T-19A
 
Direct-acting, pressure reducing/relieving valve Direct-acting, pressure reducing/relieving valve PRBB 5 gpm20 L/min. T-163A
PRDB 10 gpm40 L/min. T-11A
PRFB 20 gpm80 L/min. T-2A
PRHB 40 gpm160 L/min. T-17A
PRJB 80 gpm320 L/min. T-19A
 
Direct-acting, pressure reducing/relieving valve with open transition Direct-acting, pressure reducing/relieving valve with open transition PRBC 5 gpm20 L/min. T-163A
PRDC 10 gpm40 L/min. T-11A
 
Pilot operated, pressure reducing/relieving valve with drain to port 4 Pilot operated, pressure reducing/relieving valve with drain to port 4 PVDA 10 gpm40 L/min. T-21A
PVFA 20 gpm80 L/min. T-22A
PVHA 40 gpm160 L/min. T-23A
PVJA 80 gpm320 L/min. T-24A
 
Ventable, pilot operated, pressure reducing/relieving valve Ventable, pilot operated, pressure reducing/relieving valve PVDB 10 gpm40 L/min. T-21A
PVFB 20 gpm80 L/min. T-22A
PVHB 40 gpm160 L/min. T-23A
PVJB 80 gpm320 L/min. T-24A
 
Direct-acting, pressure reducing/relieving valve with drain to port 4 Direct-acting, pressure reducing/relieving valve with drain to port 4 PSDB 10 gpm40 L/min. T-21A
PSFB 20 gpm80 L/min. T-22A
PSHB 40 gpm160 L/min. T-23A
 
Direct-acting, pressure reducing/relieving main stage piloted from port 4 Direct-acting, pressure reducing/relieving main stage piloted from port 4 PSDT 10 gpm40 L/min. T-21A
PSFT 20 gpm80 L/min. T-22A
PSHT 40 gpm160 L/min. T-23A
PSJT 80 gpm320 L/min. T-24A
 
Electro-proportional, direct-acting, pressure reducing/relieving valve Electro-proportional, direct-acting, pressure reducing/relieving valve PRDP 5 gpm20 L/min. T-11A
 
Symbol Description Model Capacity Cavity
 
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QuickSelect™ LoadHolding Selector