Created on 12/14/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
PPFD
Pilot operated, pressure reducing/relieving valve with bypass orifice
SERIES 2 / CAPACITY: 80 L/min. / CAVITY: T-2A
Pilot-operated, pressure reducing/relieving 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).
TECHNICAL DATA
Cavity T-2A
Series 2
Capacity 80 L/min.
Factory Pressure Settings Established at blocked control port (dead headed)
Maximum Operating Pressure 350 bar
Control Pilot Flow 0,16 - 0,25 L/min.
Adjustment - Number of Clockwise Turns to Increase Setting 5
Valve Hex Size 28,6 mm
Valve Installation Torque 61 - 68 Nm
Adjustment Screw Internal Hex Size 4 mm
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990202007
Seal kit - Cartridge Polyurethane: 990002002
Seal kit - Cartridge Viton: 990202006
Model Weight 0.27 kg.
(L)CONTROL
L Standard Screw Adjustment
K Handknob
O Handknob with Panel Mount
(A)ADJUSTMENT RANGE
A 100 - 3000 psi (7 - 210 bar), 200 psi (14
bar) Standard Setting
B 50 - 1500 psi (3,5 - 105 bar), 200 psi
(14 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
V Viton
snhy.com/
PPFD
For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.
NOTES
Model Code Example: PPFDLANCONFIGURATION OPTIONS
Created on 12/14/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
D 25 - 800 psi (1,7 - 55 bar), 200 psi (14
bar) Standard Setting
E 25 - 400 psi (1,7 - 28 bar), 200 psi (14
bar) Standard Setting
H 30 - 3000 psi (2 - 210 bar), 200 psi (14
bar) Standard Setting
J 25 - 1500 psi (1,7 - 105 bar), 200 psi
(14 bar) Standard Setting
K 75 - 1500 psi (5 - 105 bar), 200 psi (14
bar) Standard Setting
TECHNICAL FEATURES
This valve incorporates a .020 (0,51 mm) in. diameter bleed orifice between the reduced pressure and tank. This biases the valve into a reducing mode in a dead
headed condition which helps the valve respond to a sudden call for flow.
Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar).
Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential
between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C
and W are tested with 5000 psi (350 bar) of inlet pressure.
Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
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.
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
