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MODEL

PPHC

Air-controlled, pilot-operated, pressure reducing/relieving valve

SERIES 3 / CAPACITY: 160 L/min. / CAVITY: T-17A

(B)CONTROL

B External 4-SAE Port

(B)OPERATING RANGE

B 50 - 1500 psi (3,5 - 105 bar)

(N)SEAL MATERIAL

N Buna-N

V Viton

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

Air-controlled, pilot-operated pressure reducing/relieving valves use compressed air over a diaphragm instead of an

adjustable spring to control the setting. These valves reduce a high primary pressure at the inlet (port 2) to a

constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3). The air signal is

supplied through a port in the hex-end of the cartridge and the hydraulic setting is directly proportional to the air

setting at a ratio of 20:1 (hydraulic:air).

TECHNICAL DATA

Cavity T-17A

Series 3

Capacity 160 L/min.

Pilot Ratio 20:1

Maximum Operating Pressure 140 bar

Control Pilot Flow 0,25 - 0,33 L/min.

Maximum Air Pressure 10,5 bar

Valve Hex Size 31,8 mm

Valve Installation Torque 203 - 217 Nm

Adjustment Screw Internal Hex Size 4 mm

Locknut Hex Size 15 mm

Locknut Torque 9 - 10 Nm

Seal kit - Cartridge Buna: 990017007

Seal kit - Cartridge Polyurethane: 990017002

Seal kit - Cartridge Viton: 990017006

sunhydraulics.com/model/

PPHC

Model Code Example: PPHCBBNCONFIGURATION OPTIONS

 2021 Sun Hydraulics 2 of 2

TECHNICAL FEATURES

All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When

considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.

Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a

separate check valve to the circuit.

The pressure at port 3 determines the minimum valve setting and should not exceed 1000 psi (70 bar).

The full adjustment range is 50 to 1500 psi (3,5 to 105 bar).

Maximum air pressure should not exceed 150 psi (10,5 bar) due to the strength of the diaphragm.

Maximum pressure differential, inlet to outlet, should not exceed 3000 psi (210 bar).

Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.

The air control feature allows explosion proof remote control.

Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge

machining variations.

PERFORMANCE CURVES