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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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  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 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.
  • 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.
  • 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-2A
Series 2
Capacity 20 gpm
Capacity (metric) 80 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) 3 in³/min.
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 50 cc/min.
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 1 1/8 in.
Valve Hex Size (metric) 28,6 mm
Valve Installation Torque 45 – 50 lbf ft
Valve Installation Torque (metric) 61 – 68 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 0.79 lb.
Model Weight (metric) 0.36 kg.
Seal kit – Cartridge Viton: 990202006

Configuration Options

Control

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

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 1000 – 4500 psi (70 – 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-2A
Nominal Capacity: 80 lpm (20 gpm)
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Possible variants

PRFBCAE, PRFB-CAE, PRFBCAE/AP, PRFB-CAE/AP, PRFBCAN, PRFB-CAN, PRFBCAN/AP, PRFB-CAN/AP, PRFBCAN/LH, PRFB-CAN/LH, PRFBCAV, PRFB-CAV, PRFBCAV/AP, PRFB-CAV/AP, PRFBCAV/LH, PRFB-CAV/LH, PRFBCBE, PRFB-CBE, PRFBCBE/AP, PRFB-CBE/AP, PRFBCBN, PRFB-CBN, PRFBCBN/AP, PRFB-CBN/AP, PRFBCBN/LH, PRFB-CBN/LH, PRFBCBV, PRFB-CBV, PRFBCBV/AP, PRFB-CBV/AP, PRFBCBV/LH, PRFB-CBV/LH, PRFBCDE, PRFB-CDE, PRFBCDE/AP, PRFB-CDE/AP, PRFBCDN, PRFB-CDN, PRFBCDN/AP, PRFB-CDN/AP, PRFBCDN/LH, PRFB-CDN/LH, PRFBCDV, PRFB-CDV, PRFBCDV/AP, PRFB-CDV/AP, PRFBCDV/LH, PRFB-CDV/LH, PRFBCEE, PRFB-CEE, PRFBCEE/AP, PRFB-CEE/AP, PRFBCEN, PRFB-CEN, PRFBCEN/AP, PRFB-CEN/AP, PRFBCEN/LH, PRFB-CEN/LH, PRFBCEV, PRFB-CEV, PRFBCEV/AP, PRFB-CEV/AP, PRFBCEV/LH, PRFB-CEV/LH, PRFBCSE, PRFB-CSE, PRFBCSE/AP, PRFB-CSE/AP, PRFBCSN, PRFB-CSN, PRFBCSN/AP, PRFB-CSN/AP, PRFBCSN/LH, PRFB-CSN/LH, PRFBCSV, PRFB-CSV, PRFBCSV/AP, PRFB-CSV/AP, PRFBCSV/LH, PRFB-CSV/LH, PRFBCWE, PRFB-CWE, PRFBCWE/AP, PRFB-CWE/AP, PRFBCWN, PRFB-CWN, PRFBCWN/AP, PRFB-CWN/AP, PRFBCWN/LH, PRFB-CWN/LH, PRFBCWV, PRFB-CWV, PRFBCWV/AP, PRFB-CWV/AP, PRFBCWV/LH, PRFB-CWV/LH, PRFBKAE, PRFB-KAE, PRFBKAN, PRFB-KAN, PRFBKAV, PRFB-KAV, PRFBKBE, PRFB-KBE, PRFBKBN, PRFB-KBN, PRFBKBV, PRFB-KBV, PRFBKDE, PRFB-KDE, PRFBKDN, PRFB-KDN, PRFBKDV, PRFB-KDV, PRFBKEE, PRFB-KEE, PRFBKEN, PRFB-KEN, PRFBKEV, PRFB-KEV, PRFBKSE, PRFB-KSE, PRFBKSN, PRFB-KSN, PRFBKSV, PRFB-KSV, PRFBKWE, PRFB-KWE, PRFBKWN, PRFB-KWN, PRFBKWV, PRFB-KWV, PRFBLAE, PRFB-LAE, PRFBLAE/AP, PRFB-LAE/AP, PRFBLAN, PRFB-LAN, PRFBLAN/AP, PRFB-LAN/AP, PRFBLAN/LH, PRFB-LAN/LH, PRFBLAV, PRFB-LAV, PRFBLAV/AP, PRFB-LAV/AP, PRFBLAV/LH, PRFB-LAV/LH, PRFBLBE, PRFB-LBE, PRFBLBE/AP, PRFB-LBE/AP, PRFBLBN, PRFB-LBN, PRFBLBN/AP, PRFB-LBN/AP, PRFBLBN/LH, PRFB-LBN/LH, PRFBLBV, PRFB-LBV, PRFBLBV/AP, PRFB-LBV/AP, PRFBLBV/LH, PRFB-LBV/LH, PRFBLDE, PRFB-LDE, PRFBLDE/AP, PRFB-LDE/AP, PRFBLDN, PRFB-LDN, PRFBLDN/AP, PRFB-LDN/AP, PRFBLDN/LH, PRFB-LDN/LH, PRFBLDV, PRFB-LDV, PRFBLDV/AP, PRFB-LDV/AP, PRFBLDV/LH, PRFB-LDV/LH, PRFBLEE, PRFB-LEE, PRFBLEE/AP, PRFB-LEE/AP, PRFBLEN, PRFB-LEN, PRFBLEN/AP, PRFB-LEN/AP, PRFBLEN/LH, PRFB-LEN/LH, PRFBLEV, PRFB-LEV, PRFBLEV/AP, PRFB-LEV/AP, PRFBLEV/LH, PRFB-LEV/LH, PRFBLSE, PRFB-LSE, PRFBLSE/AP, PRFB-LSE/AP, PRFBLSN, PRFB-LSN, PRFBLSN/AP, PRFB-LSN/AP, PRFBLSN/LH, PRFB-LSN/LH, PRFBLSV, PRFB-LSV, PRFBLSV/AP, PRFB-LSV/AP, PRFBLSV/LH, PRFB-LSV/LH, PRFBLWE, PRFB-LWE, PRFBLWE/AP, PRFB-LWE/AP, PRFBLWN, PRFB-LWN, PRFBLWN/AP, PRFB-LWN/AP, PRFBLWN/LH, PRFB-LWN/LH, PRFBLWV, PRFB-LWV, PRFBLWV/AP, PRFB-LWV/AP, PRFBLWV/LH, PRFB-LWV/LH