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SUN HYDRAULICS
PRDNXDV212


$270.30 USD

Tags:

  • SUN HYDRAULICS
  • Material:PRDNXDV212
  • Model:PRDN-XDV@212
  • 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 PRDNXDV212 (Material Number: PRDNXDV212) is an electroproportional, direct-acting reducer-reliever valve designed to manage hydraulic pressure efficiently. This valve reduces a high primary pressure at the inlet port 2 to a constant reduced pressure at port 1, while providing a full flow relief function from port 1 to tank port 3. It operates by connecting port 2 to port 1 at a specified pressure setting, and increasing the current to the coil decreases the reduced pressure proportionally. If the pressure at port 1 exceeds the coil-induced setting, it is relieved to port 3. The valve is notable for its low oil consumption due to its closed transition between reducing and relieving modes. This model should limit maximum pressure at port 3 to 3000 psi (210 bar), as it directly affects the valve setting in a 1:1 ratio. The leakage from port 3 is minimal and directly proportional to pressure differential while inversely proportional to viscosity. For optimal performance, using an amplifier with current sensing and adjustable dither between 100-250 Hz is recommended. The coils used are interchangeable with Sun's other solenoid-operated valves. The PRDNXDV212 is suitable for accumulator circuits due to reduced secondary circuit leakage in the absence of pilot control flow. Its direct-acting design ensures reliable operation even in contaminated systems or dead-headed conditions. Note that full reverse flow from reduced pressure port 1 to inlet port 2 may close the main spool; if reverse free flow is needed, a separate check valve should be considered. The cartridge incorporates Sun's floating style construction, minimizing internal part binding risks due to excessive torque or machining variations, ensuring durability and reliability in various applications.

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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