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Reducing valves
Sun Hydraulics Reducing and reducing/relieving cartridges are available in different versions and can be conveniently applied using many mounting options. 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

Reducing valves and Reducing / Relieving valves
Symbol
Function
Description
Model
Cavity
Nominal capacity
3-port
Pilot Operated Reducer 2-way

PBBB
T-163A
5 gpm (20 lpm)

PBDB
T-11A
10 gpm (40 lpm)

PBFB
T-2A
20 gpm (80 lpm)

PBHB
T-17A
40 gpm (160 lpm)

PBJB
T-19A
80 gpm (320 lpm)
3-port
Pilot Operated Reducer 2-way Drilled orifice direct in main spool

PBDF
T-11A
10 gpm (40 lpm)

PBFF
T-2A
20 gpm (80 lpm)

PBHF
T-17A
40 gpm (160 lpm)

PBJF
T-19A
80 gpm (320 lpm)
3-port
Pilot Operated Reducer, Air Controlled 2-way

PBFC
T-2A
20 gpm (80 lpm)

PBHC
T-17A
40 gpm (160 lpm)

PBJC
T-19A
80 gpm (320 lpm)
3-port
Direct Acting Reducer 2-way

PRDR
T-11A
10 gpm (40 lpm)

PRFR
T-2A
20 gpm (80 lpm)

PRHR
T-17A
40 gpm (160 lpm)

PRJR
T-19A
80 gpm (320 lpm)
3-port
Reducer Main stage 2-way

PBDB8
T-11A
10 gpm (40 lpm)

PBFB8
T-2A
20 gpm (80 lpm)

PBHB8
T-17A
40 gpm (160 lpm)

PBJB8
T-19A
80 gpm (320 lpm)
3-port
Pilot Operated Reducing/Relieving 3-way

PPDB
T-11A
10 gpm (40 lpm)

PPFB
T-2A
20 gpm (80 lpm)

PPHB
T-17A
40 gpm (160 lpm)

PPJB
T-19A
80 gpm (320 lpm)
3-port
Pilot Operated Reducing/Relieving 3-way orifice direct drilled in piston

PPDF
T-11A
10 gpm (40 lpm)

PPFF
T-2A
20 gpm (80 lpm)

PPHF
T-17A
40 gpm (160 lpm)

PPJF
T-19A
80 gpm (320 lpm)
3-port
Pilot Operated Reducing/Relieving, Air Controlled 3-way

PPFC
T-2A
20 gpm (80 lpm)

PPHC
T-17A
40 gpm (160 lpm)

PPJC
T-19A
80 gpm (320 lpm)
3-port
Direct Acting Reducing/Relieving 3-way

PRDB
T-11A
10 gpm (40 lpm)

PRFB
T-2A
20 gpm (80 lpm)

PRHB
T-17A
40 gpm (160 lpm)

PRJB
T-19A
80 gpm (320 lpm)
3-port
Direct Acting Reducing/Relieving - Open Transition 3-way

PRDC
T-11A
10 gpm (40 lpm)
4-port
Pilot Operated Reducing/Relieving, Externally Drained 3-way

PVDA
T-21A
10 gpm (40 lpm)

PVFA
T-22A
20 gpm (80 lpm)

PVHA
T-23A
40 gpm (160 lpm)

PVJA
T-24A
80 gpm (320 lpm)
4-port
Pilot Operated Reducing/Relieving, Ventable 3-way

PVDB
T-21A
10 gpm (40 lpm)

PVFB
T-22A
20 gpm (80 lpm)

PVHB
T-23A
40 gpm (160 lpm)

PVJB
T-24A
80 gpm (320 lpm)
4-port
Pilot Operated Reducing/Relieving, Externally Drained 3-way orifice direct drilled in piston

PVDD
T-21A
10 gpm (40 lpm)

PVFD
T-22A
20 gpm (80 lpm)

PVHD
T-23A
40 gpm (160 lpm)

PVJD
T-24A
80 gpm (320 lpm)
4-port
Direct Acting Reducing/Relieving, Externally Drained 3-way

PSDB
T-21A
10 gpm (40 lpm)

PSFB
T-22A
20 gpm (80 lpm)

PSHB
T-23A
40 gpm (160 lpm)
4-port
Direct Acting Reducing/Relieving, Main Stage 3-way

PSDT
T-21A
10 gpm (40 lpm)

PSFT
T-22A
20 gpm (80 lpm)

PSHT
T-23A
40 gpm (160 lpm)

PSJT
T-24A
80 gpm (320 lpm)
3-port
Electro-Proportioneal Direct acting Low leakage 3-way

PRDP
T-11A
5 gpm (20 lpm)
3-port
Electro-Proportioneal Direct acting Low leakage, Inverse Function 3-way

PRDN
T-11A
5 gpm (20 lpm)
3-port
Electro-Proportioneal Direct Acting, Improved Dynamic Response 3-way

PRDL
T-11A
5 gpm (20 lpm)
3-port
Electro-Proportioneal Direct Acting, Improved Dynamic Response Inverse Function 3-way

PRDM
T-11A
5 gpm (20 lpm)
3-port
Reducing/Relieving Main Stage with Integral T-8A Pilot Control 3-way

PPDB8
T-11A
10 gpm (40 lpm)

PPFB8
T-2A
20 gpm (80 lpm)

PPHB8
T-17A
40 gpm (160 lpm)

PPJB8
T-19A
80 gpm (320 lpm)
3-port
Reducing/Relieving Main Stage with Integral T-8A Pilot Control 3-way Driller pilot orifice direct in mail spool.

PPDF8
T-11A
10 gpm (40 lpm)

PPFF8
T-2A
20 gpm (80 lpm)

PPHF8
T-17A
40 gpm (160 lpm)

PPJF8
T-19A
80 gpm (320 lpm)
3-port
Reducing/Relieving Main Stage with Integral T-8A Pilot Control Improved Dynamic Response 3-way

PPDL8
T-11A
10 gpm (40 lpm)
4-port
Reducing/Relieving Main Stage with Integral T-8A Pilot Control Externally drained 3-way

PVDA8
T-21A
10 gpm (40 lpm)

PVFA8
T-22A
20 gpm (80 lpm)

PVHA8
T-23A
40 gpm (160 lpm)

PVJA8
T-24A
80 gpm (320 lpm)
4-port
Reducing/Relieving Main Stage with Integral T-8A Pilot Control Externally drained Improved Dynamic Response 3-way

PVHL8
T-23A
40 gpm (160 lpm)
4-port
Reducing/Relieving Direct Acting Low Leakage Externally drained 3-way

PSDP
T-21A
5 gpm (20 lpm)
4-port
Reducing/Relieving Direct Acting Improved Dynamic Response Externally drained 3-way

PSDL
T-21A
5 gpm (20 lpm)