Parker J04D3ZN Pressure Compensated Priority Flow Control Valve Cartridge

Parker J04D3ZN Pressure Compensated Priority Flow Control Valve Cartridge

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Parker Flow Control Valve


Europe Only - Pressure compensated priority flow control valves maintain constant flow regardless of changes in the load or inlet pressures. Once the priority flow requirement is satisfied, excess flow is diverted to another leg of the circuit.

Technical Specifications

  • Maximum Flow Rate: 18 GAL/MIN, 70 L/MIN
  • Flow Rate Display Range: 0.5-12 GAL/MIN, 2-45 L/MIN
  • Standard Flow Rate Setting: 5.3 GAL/MIN, 20 L/MIN
  • Adjustment Mechanism: Screw
  • Seal Material: Nitrile
  • Division: Mobile Systems Division Europe
  • Maximum Flow Rate: 18 Gal/min, 12 L/min
  • Flow Rate Display Range: 0.5-12 Gal/min, 2-45 L/min
  • Standard Flow Rate Setting: 5.3 Gal/min, 20 L/min
  • Adjustment Mechanism: Screw
  • Seal Material: Nitrile
  • Flow Rate: 18 Gal/min, 70 L/min
  • Maximum Regulated Flow Rate: 12 Gal/min, 45 L/min
  • Maximum Priority Flow: N/A L/min
  • Maximum Operating Pressure: 6000 psi, 420 bar
  • Maximum Inlet Pressure Rating: 6000 psi, 420 bar
  • Cavity Size: C10-3
  • Function: Flow Regulator Valve
  • Actuation Type: Pressure Compensated
  • Operation Type: Manually operated
  • Configuration: Priority Flow
  • Flow Rate Accuracy: N/A
  • For Fluid Type: Mineral-based or synthetic hydraulic fluids
  • Maximum Kinematic Viscosity: 45-2000 SSU (6 to 420 cSt)
  • Filter Efficiency Rating: ISO 4406 18/16/13, SAE Class 4
  • Valve Material: All parts steel. All operating parts hardened steel
  • Installation Torque: 37 lb-ft, 50 Nm
  • Operating Temperature: -30 to +250 °F, -34 to +121 °C
  • Maximum Operating Temperature: +250 °F, +121 °C
  • Minimum Operating Temperature: -30 °F, -34 °C
  • Weight: 0.4 lb, 0.18 kg
  • Body Material: N/A
  • Connection Size: N/A
  • Connection Type: N/A
Parker’s family of pressure compensated priority flow control valves feature a proven design that allows for a reliable and repeatable flow compensation curve throughout a wide pressure range while ensuring priority flow is met. These valves can operate with hydraulic system flows as high as 90 lpm and pressures up to 420 bar with a selection of adjustment and tamper-proof options. Parker’s pressure compensated priority flow control valves are ideal for steering, brake, or actuator control applications within a broad range of markets, such as the agriculture, construction, material handling, industrial, and oil & gas markets.

• Agriculture
• Construction Equipment
• Material Handling Equipment
• Miscellaneous Industrial
• Miscellaneous Mobile
• Oil & Gas

• Fine adjustments
• Reverse flow function
• Hardened working parts for maximum durability
• Tamperproof options available
• All external parts zinc plated

Value Statement:
Parker J1A125 pressure compensated, proportional flow control valves prioritizes flow for critical functions, such as steering or braking, to ensure safe and effective machine or vehicle operation.

• Steering applications
• Actuator speed control
• Meter-in circuits

Additional Technical Insight:
Priority style pressure compensator flow control valves maintain constant priority flow to one leg of a circuit regardless of any changes in load or inlet pressure. Once the priority flow is satisfied, any excess flow may be used in other parts of the circuit. The valve consists of a control orifice housed within a spring biased compensator spool. This orifice may be fixed or adjustable. The priority port is normally open while the bypass port is normally closed. As flow enters the inlet port of the cartridge, it passes through the control orifice. A pressure differential is created across the compensator spool. If the inlet flow exceeds the setting of the valve, the force produced by this pressure differential exceeds the spring force and shifts the compensator spool; opening up the bypass port, and bypassing the excess flow. If the load pressure at the bypass port is greater than the load pressure at the priority port, the compensator spool will further shift restricting the priority flow to that of the valve setting. However, caution should be taken if the priority gets blocked so that no flow can pass through the control orifice, the compensator spool will shift, blocking the bypass port and allowing inlet pressure to go to full system relief pressure. It is common to place an external relief valve downstream of the priority flow port to prevent a no flow condition.