PRL400PC06P12 HAWE Proportional Directional Valve NG6 350 bar

Product Overview

The PRL400PC06P12, PRL400PC06P06, PRL400PC06P09, and PRL500PC10P40 are proportional directional control valves from HAWE Hydraulik’s PRL series. The PRL series features proportional directional spool valves with integrated displacement transducers for closed-loop position control. These NG6 valves (CETOP 3 / ISO 4401-03) are subplate-mounted.

PRL series proportional directional valves are actuated by proportional solenoids, with an integrated displacement transducer continuously monitoring the actual spool position against the command signal, forming a closed-loop control system. This design ensures high correlation between spool displacement and electrical input signal, delivering high repeatability and excellent resolution. The series is available in both 4/2 and 4/3-way configurations.

Within HAWE’s product portfolio, PRL represents the closed-loop version with integrated displacement transducer, while POL is the non-feedback version and PIL adds a digital center position signal to the transducer.

As a direct OEM-replacement solution, this valve maintains 100% mechanical and functional interchangeability with the original HAWE unit. Every valve undergoes rigorous simulation testing—including pressure cycling, thermal variation, and full-stroke endurance validation—to guarantee factory-grade performance. Ideal for hydraulic systems demanding high control accuracy, dynamic response, and repeatability.

Technical Specifications 

PRL Series General Specifications (NG6 / CETOP 3):

• Brand: HAWE Hydraulik

• Valve Type: Proportional directional spool valve with integrated displacement transducer (closed-loop control)

• Nominal Size: NG6 (CETOP 3 / NFPA D03)

• Mounting Interface: ISO 4401-03-02-0-05

• Mounting Type: Subplate mounting

• Valve Configuration: 4/2 or 4/3-way

• Max. Operating Pressure: 350 bar (ports P, A, B)

• Max. Tank Port Pressure: 180 bar

• Max. Flow: 36 L/min

• Hysteresis: ≤ 1% (closed-loop regulation mode)

• Repeatability: ≤ 1%

• Control Type: Proportional solenoid with integrated displacement transducer

• Supply Voltage: 24 V DC (±20%)

• Control Current: 0–800 mA (24V solenoid)

• Rated Output: 14 W

• Coil Resistance: 21.3 Ω (24V solenoid at 20°C)

• Electrical Connection: DIN 43650-AF2-PG9 connector; Transducer: M12×1

• Protection Class: IP65 (when plugged)

• Duty Cycle: Continuous operation (100% ED)

• Ambient Temperature: -20°C to +50°C

• Fluid Temperature: -20°C to +70°C

• Viscosity Range: 10–600 mm²/s

• Recommended Cleanliness: ISO 4406 class 19/17/14 or better

• Filter Recommendation: β₁₀ ≥ 75

• Weight: PRL/PIL_0_PC06_ type approx. 2.5 kg (with transducer)

Model-Specific Parameters:

• PRL400PC06P12: PC06 series (NG6), P12 code (specific flow/characteristic configuration), closed-loop with transducer

• PRL400PC06P06: PC06 series (NG6), P06 code

• PRL400PC06P09: PC06 series (NG6), P09 code

• PRL500PC10P40: PC10 series (NG10 / CETOP 5), P40 code, higher flow capacity

Key Technical Advantages

1. Integrated Displacement Transducer Closed-Loop Control – Superior Repeatability

The PRL series features an integrated displacement transducer that continuously monitors actual spool position against the command signal. The closed-loop control architecture ensures high correlation between spool displacement and input signal, with hysteresis ≤ 1% and repeatability ≤ 1%. Exceptional control accuracy is maintained even under load fluctuations and oil temperature variations.

2. Excellent Resolution and Low Noise Level

PRL series valves feature precision-machined control pistons and sleeves, delivering excellent resolution. Spool displacement enables fine stepless adjustment while maintaining low noise operation.

3. Multiple Valve Configurations and Flow Characteristics – Versatile Control Options

PRL series offers both 4/2 and 4/3-way configurations with a variety of circuit symbols. Through different model code combinations, applications ranging from simple bidirectional actuator control to complex differential circuit control can be accommodated. Flow characteristics are available in symmetric or asymmetric configurations.

4. Flexible Application Range – Suitable for Mobile and Stationary Equipment

PRL series proportional directional valves are designed for continuous remote control of hydraulic motors and cylinders in both mobile and stationary applications. The robust design and high protection class (IP65) ensure reliable operation in various industrial environments.

5. Drop-In Interchangeability – Minimized Downtime and Retrofit Costs

The valve strictly adheres to HAWE’s original mounting dimensions and functional specifications, with ISO 4401-03-02-0-05 interface compliance. Whether for new system design or legacy system upgrades, this valve offers 100% mechanical and electrical interchangeability with the original HAWE unit—eliminating the need for manifold modifications or piping changes, significantly reducing downtime and retrofit expenses.

Application Areas

• Injection Molding Machinery – Precision proportional control of injection speed and pressure

• Hydraulic Presses – Closed-loop control of slide position and velocity

• Machine Tool Hydraulic Systems – Proportional control of table feed speed and direction

• Metallurgical Equipment – Precision direction and flow control in rolling mill hydraulic systems

• Mobile Equipment – Continuous proportional control of construction machinery work attachments

• Test Rigs and Simulation Systems – High-precision hydraulic excitation signal control

• As Pilot Valve for Larger Proportional Valves – Driving larger-size proportional directional valves

Expert Maintenance Tips

1. Fluid Cleanliness Management

PRL series proportional valves require a recommended fluid cleanliness level of ISO 4406 class 19/17/14 or better. Install filters with β₁₀ ≥ 75 upstream of the valve. The spool-to-sleeve clearance is extremely tight—even minor contaminants can cause spool sticking or degraded position feedback accuracy.

2. Displacement Transducer Electrical Connections

The PRL series features an integrated displacement transducer with M12×1 electrical connection. Supply voltage is 24 V DC (±20%) with residual ripple ≤ 5%. Verify that supply voltage and signal interface match the system specifications prior to installation. Use shielded cables for signal transmission with reliable single-point grounding.

3. Solenoid Drive and Amplifier Matching

The valve features a 24V proportional solenoid with a control current range of 0–800 mA and coil resistance of 21.3 Ω (at 20°C). A compatible proportional amplifier is required. Verify that amplifier output parameters match the valve’s electrical specifications prior to installation.

4. Mounting Orientation and Port Connections

Mounting position is optional, but horizontal mounting is preferred. Ensure the mounting surface is flat and smooth, with ISO 4401-03-02-0-05 compliance. Tighten mounting bolts evenly to specified torque. Take care not to damage or omit seals during assembly.

5. Pressure Differential Limitation

The pressure difference between any two ports must not exceed 100 bar. Load balancing measures are required for higher pressure differences.

6. Periodic Inspection and Maintenance

Regularly verify the valve’s flow-current characteristic curve and step response time. If increased hysteresis or reduced repeatability is detected, inspect the displacement transducer condition and solenoid functionality. For systems that have been idle for extended periods, perform thorough system circulation filtration and air bleeding before restart.