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PPHF

Pressure reducing/relieving valve from Sun Hydraulics

Description

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).

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  • These valves have the main stage orifice drilled into the piston rather than a staked-in orifice. This allows the valve to survive physically demanding applications.
  • Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and 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.
  • 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.
  • If pilot flow consumption is critical, consider using direct acting reducing/relieving valves.
  • 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.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-17A
Series 3
Capacity 40 gpm
Capacity (metric) 160 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Factory Pressure Settings Established at blocked control port (dead headed)
Control Pilot Flow 15 – 20 in³/min.
Control Pilot Flow (metric) 0,25 – 0,33 L/min.
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 1 1/4 in.
Valve Hex Size (metric) 31,8 mm
Valve Installation Torque 150 – 160 lbf ft
Valve Installation Torque (metric) 203 – 217 Nm
Adjustment Screw Internal Hex Size 5/32 in.
Adjustment Screw Internal Hex Size (metric) 4 mm
Locknut Hex Size 9/16 in.
Locknut Hex Size (metric) 15 mm
Locknut Torque 80 – 90 lbf in.
Locknut Torque (metric) 9 – 10 Nm
Model Weight 1.24 lb.
Model Weight (metric) 0.56 kg.
Seal kit – Cartridge Viton: 990017006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment
Q Capped and Lockwired

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
C 150 – 6000 psi (10,5 – 420 bar), 200 psi (14 bar) Standard Setting
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
N 60 – 800 psi (4 – 55 bar), 200 psi (14 bar) Standard Setting
Q 60 – 400 psi (4 – 28 bar), 200 psi (14 bar) Standard Setting
W 150 – 4500 psi (10,5 – 315 bar), 200 psi (14 bar) Standard Setting

Seal Material

N Buna-N
V Viton
Cavity: T-17A
Nominal Capacity: 40 gpm (160 lpm)
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Possible variants

PPHF8DE, PPHF-8DE, PPHF8DN, PPHF-8DN, PPHF8DV, PPHF-8DV, PPHF8WE, PPHF-8WE, PPHF8WN, PPHF-8WN, PPHF8WV, PPHF-8WV, PPHFCAN, PPHF-CAN, PPHFCAV, PPHF-CAV, PPHFCBN, PPHF-CBN, PPHFCBV, PPHF-CBV, PPHFCCN, PPHF-CCN, PPHFCCV, PPHF-CCV, PPHFCDN, PPHF-CDN, PPHFCDV, PPHF-CDV, PPHFCEN, PPHF-CEN, PPHFCEV, PPHF-CEV, PPHFCHN, PPHF-CHN, PPHFCHV, PPHF-CHV, PPHFCNN, PPHF-CNN, PPHFCNV, PPHF-CNV, PPHFCQN, PPHF-CQN, PPHFCQV, PPHF-CQV, PPHFCWN, PPHF-CWN, PPHFCWV, PPHF-CWV, PPHFKAN, PPHF-KAN, PPHFKAV, PPHF-KAV, PPHFKBN, PPHF-KBN, PPHFKBV, PPHF-KBV, PPHFKCN, PPHF-KCN, PPHFKCV, PPHF-KCV, PPHFKDN, PPHF-KDN, PPHFKDV, PPHF-KDV, PPHFKEN, PPHF-KEN, PPHFKEV, PPHF-KEV, PPHFKHN, PPHF-KHN, PPHFKHV, PPHF-KHV, PPHFKNN, PPHF-KNN, PPHFKNV, PPHF-KNV, PPHFKQN, PPHF-KQN, PPHFKQV, PPHF-KQV, PPHFKWN, PPHF-KWN, PPHFKWV, PPHF-KWV, PPHFLAN, PPHF-LAN, PPHFLAV, PPHF-LAV, PPHFLBN, PPHF-LBN, PPHFLBV, PPHF-LBV, PPHFLCN, PPHF-LCN, PPHFLCV, PPHF-LCV, PPHFLDN, PPHF-LDN, PPHFLDV, PPHF-LDV, PPHFLEN, PPHF-LEN, PPHFLEV, PPHF-LEV, PPHFLHN, PPHF-LHN, PPHFLHV, PPHF-LHV, PPHFLNN, PPHF-LNN, PPHFLNV, PPHF-LNV, PPHFLQN, PPHF-LQN, PPHFLQV, PPHF-LQV, PPHFLWN, PPHF-LWN, PPHFLWV, PPHF-LWV, PPHFQAN, PPHF-QAN, PPHFQAV, PPHF-QAV, PPHFQBN, PPHF-QBN, PPHFQBV, PPHF-QBV, PPHFQCN, PPHF-QCN, PPHFQCV, PPHF-QCV, PPHFQDN, PPHF-QDN, PPHFQDV, PPHF-QDV, PPHFQEN, PPHF-QEN, PPHFQEV, PPHF-QEV, PPHFQHN, PPHF-QHN, PPHFQHV, PPHF-QHV, PPHFQNN, PPHF-QNN, PPHFQNV, PPHF-QNV, PPHFQQN, PPHF-QQN, PPHFQQV, PPHF-QQV, PPHFQWN, PPHF-QWN, PPHFQWV, PPHF-QWV

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