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SUN HYDRAULICS
PRDNXDN712


$264.90 USD

Tags:

  • SUN HYDRAULICS
  • Material:PRDNXDN712
  • Model:PRDN-XDN@712
  • Summary:Cartridge

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***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics PRDNXDN712 (Material Number: PRDNXDN712) is an electroproportional, direct-acting reducer-reliever valve designed to reduce high primary pressure at inlet port 2 to a constant reduced pressure at port 1, featuring a full flow relief function from port 1 to tank port 3. This valve is configured in the reducing mode by default, linking port 2 to port 1 at a predetermined pressure setting. By modulating the current to the coil, users can proportionally decrease the reduced pressure at port 1. In cases where pressure at port 1 surpasses the coil-induced setting, it is relieved to port 3. The valve's transitional closure between reducing and relieving minimizes oil consumption, making it suitable for accumulator circuits due to reduced secondary circuit leakage. Maximum pressure at port 3 should not exceed 3000 psi (210 bar), as it adds directly to the valve setting in a 1:1 ratio. Leakage occurs out of port 3 under specific conditions and varies with pressure differential and viscosity. The transition from reducing to relieving involves a step increase in pressure equating about five percent of the adjustment range's high end. Optimal performance requires an amplifier with adjustable dither between 100-250 Hz and current sensing capabilities. The valve's direct-acting design ensures reliability even in contaminated systems and dead-headed conditions. While reverse flow from reduced pressure port 1 to inlet port 2 may close the main spool, incorporating a check valve can facilitate free flow if required. The Sun floating style construction reduces risks of internal parts binding due to installation torque or machining variations. Interchangeable with other Sun solenoid-operated valves, this model offers versatile application potential across various hydraulic systems requiring precise pressure control and relief functions.

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 reducing mode, connecting port 2 to port 1 at a customer specified pressure setting. Increasing the current to the coil will proportionally decrease 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.

  • 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.
  • Coils are interchangeable with Sun's other full flow, solenoid-operated valves and can be mounted on the tube in either direction.
  • With no electrical signal, the reduced pressure setting will default to the customer specified value. Increasing the command to the coil will proportionally reduce the secondary pressure value.
  • 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.
  • 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 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.
  • 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.

CavityT-11A
Series1
Capacity5 gpm20 L/min.
Maximum Operating Pressure5000 psi350 bar
Maximum Valve Leakage at 110 SUS (24 cSt)2.5 in³/min.41 cc/min.
Solenoid Tube Diameter.75 in.19 mm
Valve Hex Size7/8 in.22,2 mm
Valve Installation Torque30 - 35 lbf ft41 - 47 Nm
Model Weight (with coil)1.20 lb0,55 kg
Seal kit - CartridgeViton: 990-511-006
Seal and nut kit - CoilViton: 990-770-006Viton: 990-770-006

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