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PRHR

Pressure reducing valve from Sun Hydraulics

Description

Direct-acting, pressure reducing valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1. These valves incorporate a damped construction for stable operation allowing the use of high reduced pressure.

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  • Note: This valve has no relieving capability. It should not be used in a dead-headed application. If the reduced pressure side of the circuit has very low leakage the pressure may rise significantly. The pressure rise will vary from valve to valve.
  • This type of valve, PR*R, is a good replacement for an LP*C as a normally open, restrictive compensating element if a higher pressure drop across an orifice is needed.
  • 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 spring ranges are tested for correct operation with 5000 psi (350 bar) inlet pressure.
  • Suitable for accumulator circuits since the absence of pilot control flow results in reduced secondary circuit leakage.
  • Direct operated version offers superior dynamic response compared to equivalent pilot operated models.
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
  • Leakage specified in Technical Data is out of port 3 with a supply pressure of 2000 psi (140 bar) and the valve set at mid range. This leakage is directly proportional to pressure differential and inversely proportional to viscosity expressed in centistokes.
  • 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 0.25 gpm
Maximum Valve Leakage at 110 SUS (24 cSt) 4 in³/min.
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 65 cc/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 1.56 lb.
Model Weight (metric) 0.71 kg.
Seal kit – Cartridge Viton: 990017006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment

Adjustment Range

A 750 – 3000 psi (50 – 210 bar), 1000 psi (70 bar) Standard Setting
B 300 – 1500 psi (20 – 105 bar), 500 psi (35 bar) Standard Setting
D 200 – 800 psi (14 – 55 bar), 400 psi (28 bar) Standard Setting
E 100 – 400 psi (7 – 28 bar), 200 psi (14 bar) Standard Setting
S 50 – 200 psi (3,5 – 14 bar), 100 psi (7 bar) Standard Setting
W 1100 – 4500 psi (76 – 315 bar), 1100 psi (76 bar) Standard Setting

Seal Material

N Buna-N
V Viton
E EPDM

Material/Coating

/AP Stainless Steel, Passivated
/LH Mild Steel, Zinc-Nickel
Cavity: T-17A
Nominal Capacity: 40 gpm (160 lpm)
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Possible variants

PRHRCAE, PRHR-CAE, PRHRCAN, PRHR-CAN, PRHRCAN/AP, PRHR-CAN/AP, PRHRCAN/LH, PRHR-CAN/LH, PRHRCAV, PRHR-CAV, PRHRCAV/AP, PRHR-CAV/AP, PRHRCAV/LH, PRHR-CAV/LH, PRHRCBE, PRHR-CBE, PRHRCBN, PRHR-CBN, PRHRCBN/AP, PRHR-CBN/AP, PRHRCBN/LH, PRHR-CBN/LH, PRHRCBV, PRHR-CBV, PRHRCBV/AP, PRHR-CBV/AP, PRHRCBV/LH, PRHR-CBV/LH, PRHRCDE, PRHR-CDE, PRHRCDN, PRHR-CDN, PRHRCDN/AP, PRHR-CDN/AP, PRHRCDN/LH, PRHR-CDN/LH, PRHRCDV, PRHR-CDV, PRHRCDV/AP, PRHR-CDV/AP, PRHRCDV/LH, PRHR-CDV/LH, PRHRCEE, PRHR-CEE, PRHRCEN, PRHR-CEN, PRHRCEN/AP, PRHR-CEN/AP, PRHRCEN/LH, PRHR-CEN/LH, PRHRCEV, PRHR-CEV, PRHRCEV/AP, PRHR-CEV/AP, PRHRCEV/LH, PRHR-CEV/LH, PRHRCSE, PRHR-CSE, PRHRCSN, PRHR-CSN, PRHRCSN/AP, PRHR-CSN/AP, PRHRCSN/LH, PRHR-CSN/LH, PRHRCSV, PRHR-CSV, PRHRCSV/AP, PRHR-CSV/AP, PRHRCSV/LH, PRHR-CSV/LH, PRHRCWE, PRHR-CWE, PRHRCWN, PRHR-CWN, PRHRCWN/AP, PRHR-CWN/AP, PRHRCWN/LH, PRHR-CWN/LH, PRHRCWV, PRHR-CWV, PRHRCWV/AP, PRHR-CWV/AP, PRHRCWV/LH, PRHR-CWV/LH, PRHRKAE, PRHR-KAE, PRHRKAN, PRHR-KAN, PRHRKAV, PRHR-KAV, PRHRKBE, PRHR-KBE, PRHRKBN, PRHR-KBN, PRHRKBV, PRHR-KBV, PRHRKDE, PRHR-KDE, PRHRKDN, PRHR-KDN, PRHRKDV, PRHR-KDV, PRHRKEE, PRHR-KEE, PRHRKEN, PRHR-KEN, PRHRKEV, PRHR-KEV, PRHRKSE, PRHR-KSE, PRHRKSN, PRHR-KSN, PRHRKSV, PRHR-KSV, PRHRKWE, PRHR-KWE, PRHRKWN, PRHR-KWN, PRHRKWV, PRHR-KWV, PRHRLAE, PRHR-LAE, PRHRLAN, PRHR-LAN, PRHRLAN/AP, PRHR-LAN/AP, PRHRLAN/LH, PRHR-LAN/LH, PRHRLAV, PRHR-LAV, PRHRLAV/AP, PRHR-LAV/AP, PRHRLAV/LH, PRHR-LAV/LH, PRHRLBE, PRHR-LBE, PRHRLBN, PRHR-LBN, PRHRLBN/AP, PRHR-LBN/AP, PRHRLBN/LH, PRHR-LBN/LH, PRHRLBV, PRHR-LBV, PRHRLBV/AP, PRHR-LBV/AP, PRHRLBV/LH, PRHR-LBV/LH, PRHRLDE, PRHR-LDE, PRHRLDN, PRHR-LDN, PRHRLDN/AP, PRHR-LDN/AP, PRHRLDN/LH, PRHR-LDN/LH, PRHRLDV, PRHR-LDV, PRHRLDV/AP, PRHR-LDV/AP, PRHRLDV/LH, PRHR-LDV/LH, PRHRLEE, PRHR-LEE, PRHRLEN, PRHR-LEN, PRHRLEN/AP, PRHR-LEN/AP, PRHRLEN/LH, PRHR-LEN/LH, PRHRLEV, PRHR-LEV, PRHRLEV/AP, PRHR-LEV/AP, PRHRLEV/LH, PRHR-LEV/LH, PRHRLSE, PRHR-LSE, PRHRLSN, PRHR-LSN, PRHRLSN/AP, PRHR-LSN/AP, PRHRLSN/LH, PRHR-LSN/LH, PRHRLSV, PRHR-LSV, PRHRLSV/AP, PRHR-LSV/AP, PRHRLSV/LH, PRHR-LSV/LH, PRHRLWE, PRHR-LWE, PRHRLWN, PRHR-LWN, PRHRLWN/AP, PRHR-LWN/AP, PRHRLWN/LH, PRHR-LWN/LH, PRHRLWV, PRHR-LWV, PRHRLWV/AP, PRHR-LWV/AP, PRHRLWV/LH, PRHR-LWV/LH