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SUN HYDRAULICS
PSDLLEN524


$287.90 USD

Tags:

  • SUN HYDRAULICS
  • Material:PSDLLEN524
  • Model:PSDL-LEN@524
  • 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 PSDLLEN524 (PSDLLEN524) is an electroproportional, direct-acting reducer-reliever valve designed to efficiently manage hydraulic pressure within a system. This valve reduces a high primary pressure at the inlet port (Port 2) to a constant, reduced pressure at Port 1, while also providing a full flow relief function from Port 1 to tank port (Port 3). The valve is biased towards the relieving mode, and energizing the coil connects Port 2 to Port 1, allowing for proportional control of reduced pressure with increasing current. Should the pressure at Port 1 exceed the coil-induced setting, it is relieved to Port 3. The valve's design includes a draining port (Port 4), which ensures insensitivity to pressures at Port 3, enhancing its reliability in various conditions. Key specifications include a maximum operating pressure of 5000 psi (350 bar) and maximum allowable pressure at Port 3 of 3000 psi (210 bar). The valve supports a capacity of up to 5 gpm (20 L/min), and its direct-acting concept ensures robust performance even in contaminated systems. An optional manual screw adjustment ('L' adjustment) provides additional control during power failures or for boosting settings. For optimal performance, it is recommended that an amplifier with current sensing and adjustable dither be used; dither should be adjustable between 100-250 Hz. The PSDLLEN524 incorporates Sun's floating style construction, minimizing internal binding risks due to installation torque or machining variations. It features easy adjustability with up to five clockwise turns available for setting increases and comes equipped with Viton seals for durability. This model is well-suited for applications requiring precise hydraulic control and dynamic response in various operational environments.

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. Draining port 4 makes the valve insensitive to pressure at port 3. This valve is open in the transition from reducing to relieving which provides good pressure control and dynamic response. Optional full manual control is available.

  • Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
  • All spring ranges are tested for correct operation with 5000 psi (350 bar) inlet pressure.
  • Direct acting concept provides highly reliable operation in contaminated systems, especially at dead headed conditions.
  • Pressure on the drain (port 4) 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.
  • The transition from reducing to relieving is slightly open. The result is very good pressure control with oil consumption of about 0.1 gpm (0,4 L/min.).
  • For optimum performance, an amplifier with current sensing and adjustable dither should be used. Dither should be adjustable between 100 - 250 Hz.
  • 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.
  • Uses for the 'L' manual screw adjustment include: emergency valve setting during power failure or alternatively boosting the valve setting
  • With the 'L' adjustment screw, all ranges are factory set at zero (adjustment screw fully backed out). With the coil de-energized, clockwise adjustment of the screw will increase the spring bias load up to the maximum setting for that range. With the coil energized, any mechanical pressure setting is directly additive to the coil induced value.
  • By controlling the pressure at the drain (port 4), the effective setting of the valve can be increased over the nominal valve setting.
  • 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-21A
Series1
Capacity5 gpm20 L/min.
Maximum Operating Pressure5000 psi350 bar
Maximum Valve Leakage at 110 SUS (24 cSt)20 in³/min.330 cc/min.
Adjustment - Number of Clockwise Turns to Increase Setting55
Solenoid Tube Diameter.75 in.19 mm
Valve Hex Size7/8 in.22,2 mm
Valve Installation Torque30 - 35 lbf ft41 - 47 Nm
Adjustment Screw Internal Hex Size5/32 in.4 mm
Locknut Hex Size9/16 in.15 mm
Locknut Torque80 - 90 lbf in.9 - 10 Nm
Model Weight (with coil)1.20 lb0,55 kg
Seal kit - CartridgeViton: 990-021-006
Seal and nut kit - CoilViton: 990-770-006Viton: 990-770-006

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Notes:
  • Please verify cartridge clearance requirements when choosing a Sun manifold. Different valve controls and coils require different clearances.