Created on 03/17/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
PPFC
Air-controlled, pilot operated, pressure reducing/relieving valve
SERIES 2 / CAPACITY: 80 L/min. / CAVITY: T-2A
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
Pilot Ratio 20:1
Maximum Operating Pressure 140 bar
Control Pilot Flow 0,16 - 0,25 L/min.
Maximum Air Pressure 10,5 bar
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-202-007
Seal kit - Cartridge Polyurethane: 990-002-002
Seal kit - Cartridge Viton: 990-202-006
(A)CONTROL
A External 1/4 NPTF Port
(B)OPERATING RANGE
B 50 - 1500 psi (3,5 - 105 bar)
(N)SEAL MATERIAL
N Buna-N
V Viton
snhy.com/PPFC
TECHNICAL FEATURES
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.
Model Code Example: PPFCABNCONFIGURATION OPTIONS
Created on 03/17/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
The air control feature allows explosion proof remote control.
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.
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
