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PRDR

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.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • 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-11A
Series 1
Capacity 10 gpm
Capacity (metric) 40 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) 2 in³/min.
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 30 cc/min.
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 7/8 in.
Valve Hex Size (metric) 22,2 mm
Valve Installation Torque 30 – 35 lbf ft
Valve Installation Torque (metric) 41 – 47 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 0.43 lb.
Model Weight (metric) 0.20 kg.
Seal kit – Cartridge Viton: 990011006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment
O Handknob with Panel Mount

Adjustment Range

A 500 – 3000 psi (35 – 210 bar), 700 psi (50 bar) Standard Setting
B 50 – 1500 psi (3,5 – 105 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
S 25 – 200 psi (1,7 – 14 bar), 100 psi (7 bar) Standard Setting
W 750 – 4500 psi (50 – 315 bar), 1000 psi (70 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-11A
Nominal Capacity: 40 lpm (10 gpm)
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Possible variants

PRDRCAE, PRDR-CAE, PRDRCAE/AP, PRDR-CAE/AP, PRDRCAN, PRDR-CAN, PRDRCAN/AP, PRDR-CAN/AP, PRDRCAN/LH, PRDR-CAN/LH, PRDRCAV, PRDR-CAV, PRDRCAV/AP, PRDR-CAV/AP, PRDRCAV/LH, PRDR-CAV/LH, PRDRCBE, PRDR-CBE, PRDRCBE/AP, PRDR-CBE/AP, PRDRCBN, PRDR-CBN, PRDRCBN/AP, PRDR-CBN/AP, PRDRCBN/LH, PRDR-CBN/LH, PRDRCBV, PRDR-CBV, PRDRCBV/AP, PRDR-CBV/AP, PRDRCBV/LH, PRDR-CBV/LH, PRDRCDE, PRDR-CDE, PRDRCDE/AP, PRDR-CDE/AP, PRDRCDN, PRDR-CDN, PRDRCDN/AP, PRDR-CDN/AP, PRDRCDN/LH, PRDR-CDN/LH, PRDRCDV, PRDR-CDV, PRDRCDV/AP, PRDR-CDV/AP, PRDRCDV/LH, PRDR-CDV/LH, PRDRCEE, PRDR-CEE, PRDRCEE/AP, PRDR-CEE/AP, PRDRCEN, PRDR-CEN, PRDRCEN/AP, PRDR-CEN/AP, PRDRCEN/LH, PRDR-CEN/LH, PRDRCEV, PRDR-CEV, PRDRCEV/AP, PRDR-CEV/AP, PRDRCEV/LH, PRDR-CEV/LH, PRDRCSE, PRDR-CSE, PRDRCSE/AP, PRDR-CSE/AP, PRDRCSN, PRDR-CSN, PRDRCSN/AP, PRDR-CSN/AP, PRDRCSN/LH, PRDR-CSN/LH, PRDRCSV, PRDR-CSV, PRDRCSV/AP, PRDR-CSV/AP, PRDRCSV/LH, PRDR-CSV/LH, PRDRCWE, PRDR-CWE, PRDRCWE/AP, PRDR-CWE/AP, PRDRCWN, PRDR-CWN, PRDRCWN/AP, PRDR-CWN/AP, PRDRCWN/LH, PRDR-CWN/LH, PRDRCWV, PRDR-CWV, PRDRCWV/AP, PRDR-CWV/AP, PRDRCWV/LH, PRDR-CWV/LH, PRDRKAE, PRDR-KAE, PRDRKAN, PRDR-KAN, PRDRKAV, PRDR-KAV, PRDRKBE, PRDR-KBE, PRDRKBN, PRDR-KBN, PRDRKBV, PRDR-KBV, PRDRKDE, PRDR-KDE, PRDRKDN, PRDR-KDN, PRDRKDV, PRDR-KDV, PRDRKEE, PRDR-KEE, PRDRKEN, PRDR-KEN, PRDRKEV, PRDR-KEV, PRDRKSE, PRDR-KSE, PRDRKSN, PRDR-KSN, PRDRKSV, PRDR-KSV, PRDRKWE, PRDR-KWE, PRDRKWN, PRDR-KWN, PRDRKWV, PRDR-KWV, PRDRLAE, PRDR-LAE, PRDRLAE/AP, PRDR-LAE/AP, PRDRLAN, PRDR-LAN, PRDRLAN/AP, PRDR-LAN/AP, PRDRLAN/LH, PRDR-LAN/LH, PRDRLAV, PRDR-LAV, PRDRLAV/AP, PRDR-LAV/AP, PRDRLAV/LH, PRDR-LAV/LH, PRDRLBE, PRDR-LBE, PRDRLBE/AP, PRDR-LBE/AP, PRDRLBN, PRDR-LBN, PRDRLBN/AP, PRDR-LBN/AP, PRDRLBN/LH, PRDR-LBN/LH, PRDRLBV, PRDR-LBV, PRDRLBV/AP, PRDR-LBV/AP, PRDRLBV/LH, PRDR-LBV/LH, PRDRLDE, PRDR-LDE, PRDRLDE/AP, PRDR-LDE/AP, PRDRLDN, PRDR-LDN, PRDRLDN/AP, PRDR-LDN/AP, PRDRLDN/LH, PRDR-LDN/LH, PRDRLDV, PRDR-LDV, PRDRLDV/AP, PRDR-LDV/AP, PRDRLDV/LH, PRDR-LDV/LH, PRDRLEE, PRDR-LEE, PRDRLEE/AP, PRDR-LEE/AP, PRDRLEN, PRDR-LEN, PRDRLEN/AP, PRDR-LEN/AP, PRDRLEN/LH, PRDR-LEN/LH, PRDRLEV, PRDR-LEV, PRDRLEV/AP, PRDR-LEV/AP, PRDRLEV/LH, PRDR-LEV/LH, PRDRLSE, PRDR-LSE, PRDRLSE/AP, PRDR-LSE/AP, PRDRLSN, PRDR-LSN, PRDRLSN/AP, PRDR-LSN/AP, PRDRLSN/LH, PRDR-LSN/LH, PRDRLSV, PRDR-LSV, PRDRLSV/AP, PRDR-LSV/AP, PRDRLSV/LH, PRDR-LSV/LH, PRDRLWE, PRDR-LWE, PRDRLWE/AP, PRDR-LWE/AP, PRDRLWN, PRDR-LWN, PRDRLWN/AP, PRDR-LWN/AP, PRDRLWN/LH, PRDR-LWN/LH, PRDRLWV, PRDR-LWV, PRDRLWV/AP, PRDR-LWV/AP, PRDRLWV/LH, PRDR-LWV/LH, PRDROAE, PRDR-OAE, PRDROAE/AP, PRDR-OAE/AP, PRDROAN, PRDR-OAN, PRDROAN/AP, PRDR-OAN/AP, PRDROAV, PRDR-OAV, PRDROAV/AP, PRDR-OAV/AP, PRDROBE, PRDR-OBE, PRDROBE/AP, PRDR-OBE/AP, PRDROBN, PRDR-OBN, PRDROBN/AP, PRDR-OBN/AP, PRDROBV, PRDR-OBV, PRDROBV/AP, PRDR-OBV/AP, PRDRODE, PRDR-ODE, PRDRODE/AP, PRDR-ODE/AP, PRDRODN, PRDR-ODN, PRDRODN/AP, PRDR-ODN/AP, PRDRODV, PRDR-ODV, PRDRODV/AP, PRDR-ODV/AP, PRDROEE, PRDR-OEE, PRDROEE/AP, PRDR-OEE/AP, PRDROEN, PRDR-OEN, PRDROEN/AP, PRDR-OEN/AP, PRDROEV, PRDR-OEV, PRDROEV/AP, PRDR-OEV/AP, PRDROSE, PRDR-OSE, PRDROSE/AP, PRDR-OSE/AP, PRDROSN, PRDR-OSN, PRDROSN/AP, PRDR-OSN/AP, PRDROSV, PRDR-OSV, PRDROSV/AP, PRDR-OSV/AP, PRDROWE, PRDR-OWE, PRDROWE/AP, PRDR-OWE/AP, PRDROWN, PRDR-OWN, PRDROWN/AP, PRDR-OWN/AP, PRDROWV, PRDR-OWV, PRDROWV/AP, PRDR-OWV/AP