HOERBIGER PRL/PIL Proportional Valve | PRL400PC06P12 | HV07732 | Precision Directional Valve

LIC Hydraulic offers the HOERBIGER PRL and PIL Series, a premier line of high-performance Proportional Solenoid Directional Valves. These valves (such as the PRL400PC06P12 / HV07732) are designed for sophisticated hydraulic systems that require precise, stepless control of flow direction and magnitude. Renowned for their dynamic response and exceptional repeatability, HOERBIGER proportional valves are the industry standard for high-speed plastic processing and metal forming applications. Our units provide 100% drop-in interchangeability and are rigorously tested to meet original manufacturer specifications for linearity and response time.

Technical Specifications

• Brand: HOERBIGER

• Series: PRL / PIL (Proportional Series)

• Model Key: PRL400PC06P12 (ID: HV07732)

• Nominal Size: NG6 (CETOP 03) / NG10 (CETOP 05)

• Max Operating Pressure: 315 bar (4570 psi)

• Control: Current-controlled Proportional Solenoid

• Options: Integrated electronics or external amplifier driven

• Temperature Range: -20°C to +80°C

Key Technical Advantages

• High Linear Precision: Optimized spool geometry ensures a linear relationship between the input signal and flow rate, minimizing hysteresis and improving system positioning accuracy.

• Dynamic Response Characteristics: Engineered for high-speed cycle times, making them ideal for injection molding and blow molding machines where every millisecond counts.

• Robust Spool Design: The precision-lapped spool and sleeve assembly are designed to withstand high pressure drops while maintaining minimal internal leakage.

• Space-Efficient Integration: The compact CETOP standard interface allows for easy manifold mounting and integration with other stackable hydraulic modules.

Application Areas

• Plastic Processing: Clamp pressure control in injection molding and stretch-rod control in blow molding.

• Metal Forming: Synchronized cylinder control for CNC press brakes and hydraulic punching presses.

• Industrial Automation: Servohydraulic actuators for heavy-duty material handling.

• Material Testing: Dynamic loading and fatigue testing systems.

Expert Maintenance Tips

• Amplifier Tuning: Ensure the proportional amplifier is correctly calibrated. Proper Dither settings are crucial to overcome mechanical stiction and ensure smooth, jitter-free operation.

• Strict Filtration: To protect the precision internals, maintain hydraulic fluid cleanliness at ISO 16/13 or better. High-quality pressure line filtration is mandatory.

• System Air Removal: Always bleed the trapped air from the solenoid end-caps during initial setup. Trapped air can cause erratic control behavior and loud operational noise.

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