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PBHF

Pressure reducing valve from Sun Hydraulics

Description

Pilot-operated, pressure reducing valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, allowing circuits with multiple pressure requirements to be operated using a single pump.

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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.
  • 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.
  • 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.
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
  • Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting 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 1.26 lb.
Model Weight (metric) 0.57 kg.
Seal kit – Cartridge Viton: 990017006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment
M Capped Screw Adjustment with Lockwire Holes
Q Capped and Lockwired
W Hex Wrench Adjustment
Y Tri-Grip Handknob

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
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

PBHF8DE, PBHF-8DE, PBHF8DN, PBHF-8DN, PBHF8DV, PBHF-8DV, PBHF8WE, PBHF-8WE, PBHF8WN, PBHF-8WN, PBHF8WV, PBHF-8WV, PBHFCAN, PBHF-CAN, PBHFCAV, PBHF-CAV, PBHFCBN, PBHF-CBN, PBHFCBV, PBHF-CBV, PBHFCCN, PBHF-CCN, PBHFCCV, PBHF-CCV, PBHFCDN, PBHF-CDN, PBHFCDV, PBHF-CDV, PBHFCEN, PBHF-CEN, PBHFCEV, PBHF-CEV, PBHFCNN, PBHF-CNN, PBHFCNV, PBHF-CNV, PBHFCQN, PBHF-CQN, PBHFCQV, PBHF-CQV, PBHFCWN, PBHF-CWN, PBHFCWV, PBHF-CWV, PBHFKAN, PBHF-KAN, PBHFKAV, PBHF-KAV, PBHFKBN, PBHF-KBN, PBHFKBV, PBHF-KBV, PBHFKCN, PBHF-KCN, PBHFKCV, PBHF-KCV, PBHFKDN, PBHF-KDN, PBHFKDV, PBHF-KDV, PBHFKEN, PBHF-KEN, PBHFKEV, PBHF-KEV, PBHFKNN, PBHF-KNN, PBHFKNV, PBHF-KNV, PBHFKQN, PBHF-KQN, PBHFKQV, PBHF-KQV, PBHFKWN, PBHF-KWN, PBHFKWV, PBHF-KWV, PBHFLAN, PBHF-LAN, PBHFLAV, PBHF-LAV, PBHFLBN, PBHF-LBN, PBHFLBV, PBHF-LBV, PBHFLCN, PBHF-LCN, PBHFLCV, PBHF-LCV, PBHFLDN, PBHF-LDN, PBHFLDV, PBHF-LDV, PBHFLEN, PBHF-LEN, PBHFLEV, PBHF-LEV, PBHFLNN, PBHF-LNN, PBHFLNV, PBHF-LNV, PBHFLQN, PBHF-LQN, PBHFLQV, PBHF-LQV, PBHFLWN, PBHF-LWN, PBHFLWV, PBHF-LWV, PBHFMAN, PBHF-MAN, PBHFMAV, PBHF-MAV, PBHFMBN, PBHF-MBN, PBHFMBV, PBHF-MBV, PBHFMCN, PBHF-MCN, PBHFMCV, PBHF-MCV, PBHFMDN, PBHF-MDN, PBHFMDV, PBHF-MDV, PBHFMEN, PBHF-MEN, PBHFMEV, PBHF-MEV, PBHFMNN, PBHF-MNN, PBHFMNV, PBHF-MNV, PBHFMQN, PBHF-MQN, PBHFMQV, PBHF-MQV, PBHFMWN, PBHF-MWN, PBHFMWV, PBHF-MWV, PBHFQAN, PBHF-QAN, PBHFQAV, PBHF-QAV, PBHFQBN, PBHF-QBN, PBHFQBV, PBHF-QBV, PBHFQCN, PBHF-QCN, PBHFQCV, PBHF-QCV, PBHFQDN, PBHF-QDN, PBHFQDV, PBHF-QDV, PBHFQEN, PBHF-QEN, PBHFQEV, PBHF-QEV, PBHFQNN, PBHF-QNN, PBHFQNV, PBHF-QNV, PBHFQQN, PBHF-QQN, PBHFQQV, PBHF-QQV, PBHFQWN, PBHF-QWN, PBHFQWV, PBHF-QWV, PBHFWAN, PBHF-WAN, PBHFWAV, PBHF-WAV, PBHFWBN, PBHF-WBN, PBHFWBV, PBHF-WBV, PBHFWCN, PBHF-WCN, PBHFWCV, PBHF-WCV, PBHFWDN, PBHF-WDN, PBHFWDV, PBHF-WDV, PBHFWEN, PBHF-WEN, PBHFWEV, PBHF-WEV, PBHFWNN, PBHF-WNN, PBHFWNV, PBHF-WNV, PBHFWQN, PBHF-WQN, PBHFWQV, PBHF-WQV, PBHFWWN, PBHF-WWN, PBHFWWV, PBHF-WWV, PBHFYAN, PBHF-YAN, PBHFYAV, PBHF-YAV, PBHFYBN, PBHF-YBN, PBHFYBV, PBHF-YBV, PBHFYCN, PBHF-YCN, PBHFYCV, PBHF-YCV, PBHFYDN, PBHF-YDN, PBHFYDV, PBHF-YDV, PBHFYEN, PBHF-YEN, PBHFYEV, PBHF-YEV, PBHFYNN, PBHF-YNN, PBHFYNV, PBHF-YNV, PBHFYQN, PBHF-YQN, PBHFYQV, PBHF-YQV, PBHFYWN, PBHF-YWN, PBHFYWV, PBHF-YWV