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Pressure reducing/relieving valve from Sun Hydraulics

Description

Direct-acting, 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). These valves incorporate a damped construction for stable operation allowing the use of high reduced pressure.

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  • 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.
  • 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 acting concept provides highly reliable operation in contaminated systems, especially at dead headed conditions.
  • Unlike pilot operated versions, direct acting valves exhibit a transitional step between reducing and relieving modes. This step equals 5% of the high end of the adjustment range, independent of the valve setting. Therefore, these valves may not be suitable for counterbalancing applications.
  • 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.
  • W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
  • 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.
  • 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

L ★ Standard Screw Adjustment
C Tamper Resistant – Factory Set
K Handknob
Y Tri-Grip Handknob
O Handknob with Panel Mount
W Hex Wrench Adjustment

Adjustment Range

A ★ 500 – 3000 psi (35 – 210 bar), 700 psi (50 bar) Standard Setting
W ★ 750 – 4500 psi (50 – 315 bar), 1000 psi (70 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

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

PRDBCAE, PRDB-CAE, PRDBCAE/AP, PRDB-CAE/AP, PRDBCAN, PRDB-CAN, PRDBCAN/AP, PRDB-CAN/AP, PRDBCAN/LH, PRDB-CAN/LH, PRDBCAV, PRDB-CAV, PRDBCAV/AP, PRDB-CAV/AP, PRDBCAV/LH, PRDB-CAV/LH, PRDBCBE, PRDB-CBE, PRDBCBE/AP, PRDB-CBE/AP, PRDBCBN, PRDB-CBN, PRDBCBN/AP, PRDB-CBN/AP, PRDBCBN/LH, PRDB-CBN/LH, PRDBCBV, PRDB-CBV, PRDBCBV/AP, PRDB-CBV/AP, PRDBCBV/LH, PRDB-CBV/LH, PRDBCDE, PRDB-CDE, PRDBCDE/AP, PRDB-CDE/AP, PRDBCDN, PRDB-CDN, PRDBCDN/AP, PRDB-CDN/AP, PRDBCDN/LH, PRDB-CDN/LH, PRDBCDV, PRDB-CDV, PRDBCDV/AP, PRDB-CDV/AP, PRDBCDV/LH, PRDB-CDV/LH, PRDBCEE, PRDB-CEE, PRDBCEE/AP, PRDB-CEE/AP, PRDBCEN, PRDB-CEN, PRDBCEN/AP, PRDB-CEN/AP, PRDBCEN/LH, PRDB-CEN/LH, PRDBCEV, PRDB-CEV, PRDBCEV/AP, PRDB-CEV/AP, PRDBCEV/LH, PRDB-CEV/LH, PRDBCSE, PRDB-CSE, PRDBCSE/AP, PRDB-CSE/AP, PRDBCSN, PRDB-CSN, PRDBCSN/AP, PRDB-CSN/AP, PRDBCSN/LH, PRDB-CSN/LH, PRDBCSV, PRDB-CSV, PRDBCSV/AP, PRDB-CSV/AP, PRDBCSV/LH, PRDB-CSV/LH, PRDBCWE, PRDB-CWE, PRDBCWE/AP, PRDB-CWE/AP, PRDBCWN, PRDB-CWN, PRDBCWN/AP, PRDB-CWN/AP, PRDBCWN/LH, PRDB-CWN/LH, PRDBCWV, PRDB-CWV, PRDBCWV/AP, PRDB-CWV/AP, PRDBCWV/LH, PRDB-CWV/LH, PRDBKAE, PRDB-KAE, PRDBKAN, PRDB-KAN, PRDBKAV, PRDB-KAV, PRDBKBE, PRDB-KBE, PRDBKBN, PRDB-KBN, PRDBKBV, PRDB-KBV, PRDBKDE, PRDB-KDE, PRDBKDN, PRDB-KDN, PRDBKDV, PRDB-KDV, PRDBKEE, PRDB-KEE, PRDBKEN, PRDB-KEN, PRDBKEV, PRDB-KEV, PRDBKSE, PRDB-KSE, PRDBKSN, PRDB-KSN, PRDBKSV, PRDB-KSV, PRDBKWE, PRDB-KWE, PRDBKWN, PRDB-KWN, PRDBKWV, PRDB-KWV, PRDBLAE, PRDB-LAE, PRDBLAE/AP, PRDB-LAE/AP, PRDBLAN, PRDB-LAN, PRDBLAN/AP, PRDB-LAN/AP, PRDBLAN/LH, PRDB-LAN/LH, PRDBLAV, PRDB-LAV, PRDBLAV/AP, PRDB-LAV/AP, PRDBLAV/LH, PRDB-LAV/LH, PRDBLBE, PRDB-LBE, PRDBLBE/AP, PRDB-LBE/AP, PRDBLBN, PRDB-LBN, PRDBLBN/AP, PRDB-LBN/AP, PRDBLBN/LH, PRDB-LBN/LH, PRDBLBV, PRDB-LBV, PRDBLBV/AP, PRDB-LBV/AP, PRDBLBV/LH, PRDB-LBV/LH, PRDBLDE, PRDB-LDE, PRDBLDE/AP, PRDB-LDE/AP, PRDBLDN, PRDB-LDN, PRDBLDN/AP, PRDB-LDN/AP, PRDBLDN/LH, PRDB-LDN/LH, PRDBLDV, PRDB-LDV, PRDBLDV/AP, PRDB-LDV/AP, PRDBLDV/LH, PRDB-LDV/LH, PRDBLEE, PRDB-LEE, PRDBLEE/AP, PRDB-LEE/AP, PRDBLEN, PRDB-LEN, PRDBLEN/AP, PRDB-LEN/AP, PRDBLEN/LH, PRDB-LEN/LH, PRDBLEV, PRDB-LEV, PRDBLEV/AP, PRDB-LEV/AP, PRDBLEV/LH, PRDB-LEV/LH, PRDBLSE, PRDB-LSE, PRDBLSE/AP, PRDB-LSE/AP, PRDBLSN, PRDB-LSN, PRDBLSN/AP, PRDB-LSN/AP, PRDBLSN/LH, PRDB-LSN/LH, PRDBLSV, PRDB-LSV, PRDBLSV/AP, PRDB-LSV/AP, PRDBLSV/LH, PRDB-LSV/LH, PRDBLWE, PRDB-LWE, PRDBLWE/AP, PRDB-LWE/AP, PRDBLWN, PRDB-LWN, PRDBLWN/AP, PRDB-LWN/AP, PRDBLWN/LH, PRDB-LWN/LH, PRDBLWV, PRDB-LWV, PRDBLWV/AP, PRDB-LWV/AP, PRDBLWV/LH, PRDB-LWV/LH, PRDBOAE, PRDB-OAE, PRDBOAN, PRDB-OAN, PRDBOAV, PRDB-OAV, PRDBOBE, PRDB-OBE, PRDBOBN, PRDB-OBN, PRDBOBV, PRDB-OBV, PRDBODE, PRDB-ODE, PRDBODN, PRDB-ODN, PRDBODV, PRDB-ODV, PRDBOEE, PRDB-OEE, PRDBOEN, PRDB-OEN, PRDBOEV, PRDB-OEV, PRDBOSE, PRDB-OSE, PRDBOSN, PRDB-OSN, PRDBOSV, PRDB-OSV, PRDBOWE, PRDB-OWE, PRDBOWN, PRDB-OWN, PRDBOWV, PRDB-OWV, PRDBWAE, PRDB-WAE, PRDBWAN, PRDB-WAN, PRDBWAV, PRDB-WAV, PRDBWBE, PRDB-WBE, PRDBWBN, PRDB-WBN, PRDBWBV, PRDB-WBV, PRDBWDE, PRDB-WDE, PRDBWDN, PRDB-WDN, PRDBWDV, PRDB-WDV, PRDBWEE, PRDB-WEE, PRDBWEN, PRDB-WEN, PRDBWEV, PRDB-WEV, PRDBWSE, PRDB-WSE, PRDBWSN, PRDB-WSN, PRDBWSV, PRDB-WSV, PRDBWWE, PRDB-WWE, PRDBWWN, PRDB-WWN, PRDBWWV, PRDB-WWV, PRDBYAE, PRDB-YAE, PRDBYAN, PRDB-YAN, PRDBYAV, PRDB-YAV, PRDBYBE, PRDB-YBE, PRDBYBN, PRDB-YBN, PRDBYBV, PRDB-YBV, PRDBYDE, PRDB-YDE, PRDBYDN, PRDB-YDN, PRDBYDV, PRDB-YDV, PRDBYEE, PRDB-YEE, PRDBYEN, PRDB-YEN, PRDBYEV, PRDB-YEV, PRDBYSE, PRDB-YSE, PRDBYSN, PRDB-YSN, PRDBYSV, PRDB-YSV, PRDBYWE, PRDB-YWE, PRDBYWN, PRDB-YWN, PRDBYWV, PRDB-YWV