D41FCB31FC4NE7019 Parker Proportional Directional Valve 200 L/min

Product Overview

The D41FCB31FC4NE7019 series pilot-operated proportional directional valve is manufactured to original Parker technical standards. Belonging to the D*1FC series with size 16 (NG16 / CETOP 07 / ISO 4401-07), this valve is a high-performance electro-hydraulic proportional directional control valve. Featuring a pilot-operated two-stage design conforming to DIN 24340 / ISO 4401 / CETOP RP121 mounting standards, it is equipped with a high-resolution position feedback system and digital on-board electronics (OBE). The proportional solenoid drives the pilot spool, and the pilot pressure then positions the main spool for continuous, precise proportional control of both direction and flow magnitude.

This model employs spool type B31 with a nominal flow rate of 200 L/min (at Δp = 5 bar per metering edge) and maximum operating pressure of 350 bar (5075 psi). The digital on-board electronics are situated in a robust metal housing, allowing usage under rough environmental conditions, with nominal values factory set. The valve features low hysteresis (≤ 0.1%), high dynamics, and high flow capacity, specifically engineered for high-accuracy flow control applications in medium-to-high pressure industrial hydraulic systems.

This product is dimensionally and functionally identical to the original Parker D41FC series valve, offering true drop-in interchangeability for direct replacement of same-specification OEM valves. Every unit undergoes 100% bench testing under simulated working conditions, including rated pressure holding, spool position accuracy, flow linearity, and dynamic response characterization.

Technical Specifications 

General Specifications

• Model: D41FCB31FC4NE7019

• Product Series: D*1FC Series (Size 16 / NG16 / CETOP 07 / ISO 4401-07)

• Spool Symbol: B31 (Center Q = Q1/2, P to T)

• Design: Pilot-operated, 2-stage proportional directional valve with position feedback and digital on-board electronics (OBE)

• Mounting Pattern: DIN 24340 / ISO 4401 / CETOP RP121 / NFPA

• Installation Position: Unrestricted

Hydraulic Parameters

• Nominal Flow Rate: 200 L/min (at Δp = 5 bar per metering edge)

• Maximum Operating Pressure: 350 bar (5075 psi)

• Pilot Supply: Internal / Internal

• Hydraulic Fluid: Mineral-based hydraulic oil (per DIN 51524), water glycol

• Viscosity Range: 20 – 400 cSt (mm²/s)

• Fluid Temperature Range: NBR seals -25°C to +60°C

• Filtration: ISO 4406 18/16/13

• Hysteresis: ≤ 0.1%

• Response Time: D41FC approx. 4.1 ms

• Pilot Pressure Range: 20 – 350 bar

• Pressure Differential: 5 bar

Electrical Parameters

• Supply Voltage: 18 to 30 VDC (electric shut-off at < 17 V, ripple < 5% eff., surge free)

• Command Signal: Analog 0 to ±20 mA / 0 to ±10 V

• Integrated Electronics: Digital OBE (On-Board Electronics) in robust metal housing

• Parametrizing Interface: RS232 serial interface (via ProPxD software)

• Maximum Current Consumption: 2.0 A (D1FC, D*1FC)

• Electrical Connector: 6 + PE + enable, per EN 175201-804

• Protection Class: IP65 (per EN 60529)

• Duty Cycle: Continuous

Materials & Construction

• Valve Body: Cast Iron

• Spool/Sleeve: Spool/sleeve design for high-accuracy pilot control

• Seals: NBR (standard) / FPM (optional)

• Weight: approx. 12.5 kg

Key Technical Advantages

1. High-Resolution Position Feedback System with Closed-Loop Control
The D41FCB31FC4NE7019 is equipped with a high-resolution position feedback system (LVDT) providing real-time monitoring and closed-loop control of the main spool position. The inductive position transducer ensures the spool position is independent of flow forces, maintaining precise position control even at large flow rates. This high-accuracy feedback system, combined with digital OBE electronics, achieves low hysteresis (≤ 0.1%) and exceptional repeatability, significantly improving machining accuracy and product consistency.

2. Integrated Digital OBE Electronics with ProPxD Software Parametrization
The valve integrates digital electronics into a robust metal housing, allowing usage under rough environmental conditions. Nominal values are factory set, and users can access and adjust valve electronic parameters via the free ProPxD software and RS232 parametrizing cable. The integrated diagnostic function further simplifies optimal configuration, supporting monitoring of spool position, temperature, operating hours, and various error messages. This design significantly simplifies system architecture, eliminating the need for an external amplifier.

3. Progressive Flow Characteristics with High-Accuracy Flow Control
The spool metering notches are optimized for progressive flow characteristics, enabling sensitive flow adjustment. The B31 spool provides center Q = Q1/2 flow distribution with P to T. The nominal flow of 200 L/min (at Δp = 5 bar per metering edge), combined with low hysteresis and high dynamic response, enables precise actuator speed control for high-accuracy synchronization applications.

4. High Dynamic Response and High Flow Capacity
The valve offers high dynamic response with a response time of approximately 4.1 ms, suitable for demanding open-loop and closed-loop control applications. It achieves 200 L/min high flow capacity in size 16, delivering optimal efficiency relative to valve size. The pilot valve is based on the proven D1FB control valve with spool/sleeve design, ensuring high-accuracy pilot control.

5. 100% Simulated Working Condition Testing and Drop-in Interchangeability
Every D41FCB31FC4NE7019 valve undergoes 100% bench testing prior to shipment, covering 350 bar rated pressure holding, spool position accuracy calibration, flow-signal linearity verification, internal leakage measurement, and solenoid dynamic response characterization. Mounting dimensions, port positions, electrical interfaces, and performance curves are strictly matched to the original Parker valve, enabling direct drop-in replacement without modifying piping or control programs.

Application Areas

• Industrial Hydraulic Systems: High-accuracy flow and directional control for general industrial hydraulic systems

• Machine Tools: CNC hydraulic clamping systems, feed control

• Injection Molding Machines: Injection speed and holding pressure proportional control

• Presses: Proportional speed and direction regulation for hydraulic presses

• Power Generation: Precision regulation for power plant hydraulic control systems

• Rubber and Tire Processing Equipment: Hydraulic control for tire presses and rubber presses

• Printing Equipment: Hydraulic drive control for general printing machines

• Dynamic Position Control Systems: Applications requiring high-accuracy pressure/flow closed-loop control

Expert Maintenance Tips

Installation Guidelines

1. The D41FCB31FC4NE7019 can be mounted in any position. Mounting surface flatness must be 0.01 mm/100 mm with a surface finish of 6.3 μm. Use 4×M10×60 bolts (ISO 4762, grade 12.9) and tighten diagonally in stages to 13.2/63 Nm.

2. Thoroughly flush all piping circuits before installation. Ensure no welding slag, metal chips, or particulate contaminants remain. Prior to first operation, circulate the system through a 10 μm filter element for a minimum of 30 minutes. Recommended fluid cleanliness is ISO 4406 18/16/13 or better.

3. Electrical connections must use a 6+PE connector conforming to EN 175201-804. Metal housing connectors are mandatory for EMC performance. Control signal cables should be shielded, with a maximum cable length of 50 m.

Routine Maintenance Procedures

1. Fluid Cleanliness Management: Maintain system fluid cleanliness at ISO 4406 18/16/13 or better. Check fluid particulate contamination every 500 operating hours and replace filter elements and hydraulic fluid when contamination exceeds limits.

2. Electrical Zero Point Verification: Periodically check the electrical zero point for drift with the power supply disconnected. If zero point deviation exceeds ± 2%, re-calibrate via ProPxD software and RS232 parametrizing cable.

3. Diagnostic Signal Monitoring: Utilize the integrated diagnostic function to periodically monitor spool position, temperature, operating hours, and error messages to detect potential issues early.

4. Internal Leakage Monitoring: Due to the design principle, pilot-operated proportional valves have inherent internal leakage. An annual internal leakage test is recommended. If leakage exceeds 150% of the factory standard, seal replacement should be scheduled.

5. Pilot Circuit Inspection: Periodically check the pilot circuit for unobstructed flow and ensure stable pilot pressure within 20 to 350 bar. If main stage shifting is abnormal, first check the pilot stage operation.