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PRDG

Pressure reducing/relieving valve from Sun Hydraulics

Description

This electro-proportional, direct-acting reducer/reliever valve reduces 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). The valve is biased to the relieving mode. Energizing the coil connects port 2 to port 1. Increasing the current to the coil will proportionally increase the reduced pressure at port 1. If pressure at port 1 exceeds the setting induced by the coil, pressure at port 1 is relieved to port 3. This valve is closed in the transition between reducing and relieving resulting in very low consumption of oil.

This valve is designed to be used with 740 and 747 Series coils.

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  • Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
  • 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.
  • The transition from reducing to relieving is closed. The result is very low leakage. However, there is a transitional step increase in pressure between reducing and relieving modes. This step equals about 5% of the high end of the adjustment range, independent of the valve setting.
  • For optimum performance, an amplifier with current sensing and adjustable dither should be used. Dither should be adjustable between 100 – 250 Hz.
  • NOTE: There is no upper limit to the pressure setting when using the M control. The more force you exert on the manual override, the higher the resulting pressure.
  • Fully compatible with the XMD Expandable Mobile Drivers from Sun.
  • 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.
  • 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.
  • 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 5 gpm
Capacity (metric) 20 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 2.5 in³/min.
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 41 cc/min.
Solenoid Tube Diameter .63 in.
Solenoid Tube Diameter (metric) 16 mm
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
Model Weight (with coil) 1.20 lb
Model Weight (with coil) (metric) 0,55 kg
Seal kit – Cartridge Viton: 990511006
Seal and nut kit – Coil Viton: 990740006
Model Weight 0.58 lb.
Model Weight (metric) 0.26 kg.
Hysteresis (with dither) 6%
Hysteresis with DC input <8%
Linearity (with dither) <2%
Repeatability (with dither) <2%
Recommended dither frequency 140 Hz

Configuration Options

Control

M Manual Override (Standard)
X No Manual Override

Operating Range

B 100 – 1125 psi (7 – 77,5 bar)
D 50 – 485 psi (3,5 – 33,5 bar)
E 25 – 250 psi (1,7 – 18 bar)

Seal Material

N Buna-N
V Viton

Control

X01 {with XMD-01 driver}
X02 {with XMD-02 driver}

Coil

211 DIN 43650-Form A, 115 VAC
212 DIN 43650-Form A, 12 VDC
212D DIN 43650-Form A, 12 VDC, with transient voltage suppression (TVS) diodes
212X01 DIN 43650-Form A, 12 VDC, with XMD-01 driver
212X02 DIN 43650-Form A, 12 VDC, with XMD-02 driver
214 DIN 43650-Form A, 14 VDC
214D DIN 43650-Form A, 14 VDC, with transient voltage suppression (TVS) diodes
214X01 DIN 43650-Form A, 14 VDC, with XMD-01 driver
214X02 DIN 43650-Form A, 14 VDC, with XMD-02 driver
223 DIN 43650-Form A, 230 VAC
224 DIN 43650-Form A, 24 VDC
224D DIN 43650-Form A, 24 VDC, with transient voltage suppression (TVS) diodes
224X01 DIN 43650-Form A, 24 VDC, with XMD-01 driver
224X02 DIN 43650-Form A, 24 VDC, with XMD-02 driver
228 DIN 43650-Form A, 28 VDC
228D DIN 43650-Form A, 28 VDC, with transient voltage suppression (TVS) diodes
228X01 DIN 43650-Form A, 28 VDC, with XMD-01 driver
228X02 DIN 43650-Form A, 28 VDC, with XMD-02 driver
612 AMP Junior Timer, 12 VDC
612D AMP Junior Timer, 12 VDC, with transient voltage suppression (TVS) diodes
614 AMP Junior Timer, 14 VDC
614D AMP Junior Timer, 14 VDC, with transient voltage suppression (TVS) diodes
624 AMP Junior Timer, 24 VDC
624D AMP Junior Timer, 24 VDC, with transient voltage suppression (TVS) diodes
628 AMP Junior Timer, 28 VDC
628D AMP Junior Timer, 28 VDC, with transient voltage suppression (TVS) diodes
712 Twin Lead, 12 VDC
712D Twin Lead, 12 VDC, with transient voltage suppression (TVS) diodes
714 Twin Lead, 14 VDC
714D Twin Lead, 14 VDC, with transient voltage suppression (TVS) diodes
724 Twin Lead, 24 VDC
724D Twin Lead, 24 VDC, with transient voltage suppression (TVS) diodes
728 Twin Lead, 28 VDC
728D Twin Lead, 28 VDC, with transient voltage suppression (TVS) diodes
812 Metri-Pack, 12 VDC
812D Metri-Pack, 12 VDC, with transient voltage suppression (TVS) diodes
814 Metri-Pack, 14 VDC
814D Metri-Pack, 14 VDC, with transient voltage suppression (TVS) diodes
824 Metri-Pack, 24 VDC
824D Metri-Pack, 24 VDC, with transient voltage suppression (TVS) diodes
828 Metri-Pack, 28 VDC
828D Metri-Pack, 28 VDC, with transient voltage suppression (TVS) diodes
912 Deutsch DT04-2P, 12 VDC
912D Deutsch DT04-2P, 12 VDC, with transient voltage suppression (TVS) diodes
912X01 Deutsch DT04-2P, 12 VDC, with XMD-01 driver
912X02 Deutsch DT04-2P, 12 VDC, with XMD-02 driver
914 Deutsch DT04-2P, 14 VDC
914D Deutsch DT04-2P, 14 VDC, with transient voltage suppression (TVS) diodes
914X01 Deutsch DT04-2P, 14 VDC, with XMD-01 driver
914X02 Deutsch DT04-2P, 14 VDC, with XMD-02 driver
924 Deutsch DT04-2P, 24 VDC
924D Deutsch DT04-2P, 24 VDC, with transient voltage suppression (TVS) diodes
924X01 Deutsch DT04-2P, 24 VDC, with XMD-01 driver
924X02 Deutsch DT04-2P, 24 VDC, with XMD-02 driver
928 Deutsch DT04-2P, 28 VDC
928D Deutsch DT04-2P, 28 VDC, with transient voltage suppression (TVS) diodes
928X01 Deutsch DT04-2P, 28 VDC, with XMD-01 driver
928X02 Deutsch DT04-2P, 28 VDC, with XMD-02 driver
JM24BD Explosion Proof, Metric (M20 X 1.5), 24 VDC, 180 Degree, CSA and ATEX Certification
JM24CD Explosion Proof, Metric (M20 X 1.5), 24 VDC, 90 Degree, CSA and ATEX Certification
JN24BD Explosion Proof, 1/2 inch NPT mechanical conduit, 24 VDC, 180 Degree, CSA and ATEX Certification
JN24CD Explosion Proof, 1/2 inch NPT mechanical conduit, 24 VDC, 90 Degree, CSA and ATEX Certification
Cavity: T-11A
Nominal Capacity: 20 lpm (5 gpm)
Downloads
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Possible variants

PRDGMDN, PRDGXDN, PRDGMBN, PRDGXBN, PRDGMEN, PRDGXEN, PRDGMDV, PRDGXDV, PRDGMBV, PRDGXBV, PRDGMEV, PRDGXEV

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