HAWE PMVP Proportional Relief Valve | PMVP 4-43 PMVP 4-44 PMVP 45-41 G24

The PMVP Series (specifically including the PMVP 4-43-G24, PMVP 4-44-G24, and PMVP 45-41-G24 nomenclatures) of pilot-operated screw-in cartridge proportional pressure-limiting valves manufactured by Chengyuan Hydraulic are premium electro-hydraulic fluid control components engineered to cross-reference the rigorous speed and pressure parameters of HAWE Hydraulics. Designed as a high-tensile steel seat/poppet-type valve platform, this series enables continuous, infinitely variable, and highly linear proportional pressure regulation across complex hydraulic circuits, making it an ideal choice for original equipment replacement. For the target part classifications supplied—covering both PMVP 4 and PMVP 45 frames paired with 24V DC driver groups—Chengyuan applies specialized vacuum quenching and sub-micron lapping to the internal ball-seat sealing interfaces. This ensures 100% original-place interchangeable plug-and-play compatibility for HAWE standard cartridge cavities, subplate interfaces, or inline-piped ports, replicating original cracking characteristics, hyper-pressure tolerances up to 450 bar, and zero leakage integrity. Every individual valve undergoes an intensive 100% simulated continuous load dynamic audit, step-response profiling, and micro-leak tracking prior to packaging to ensure drift-free execution under massive fluid ripple conditions.

Technical Specifications :

• Brand Compatibility Matrix: HAWE PMV / PMVP Proportional Series Equivalent

• Target Part Number Nomenclature Covered: PMVP 4-43-G24, PMVP 4-44-G24, PMVP 45-41-G24

• Physical Mounting Configuration: Screw-in cartridge form factor, adaptable to modular manifold blocks, subplate mounting, or standalone inline pipeline junctions

• Maximum Allowable Volumetric Flow Rate:

  • PMVP 4 Frame Layout: Rated up to 16 L/min (4.2 GPM)

  • PMVP 45 Frame Layout: Rated up to 16 L/min (4.2 GPM)

• Pressure Stage Code Specifications (41 / 43 / 44 Matrix):

  • Code 41 Variant (e.g., PMVP 45-41): Proportional adjustable window up to 160 bar (2320 PSI)

  • Code 43 Variant (e.g., PMVP 4-43): Proportional adjustable window up to 315 bar (4560 PSI)

• Maximum Structural Adjustment Setting (Code 44): Up to 450 bar (6525 PSI continuous mechanical load boundary)

• Minimum Basal Controllable Pressure ($p_{min}$): Approx. 5 to 7 bar (Adjustable via a top-mounted mechanical spring pre-tension screw)

• Solenoid Driver Electrical Specification (G24): 24V DC heavy-duty proportional wet-pin armature coil (Connector matches standard DIN EN 175 301-803 A interface)

• Rated Control Input Current Window: 0 to 750 mA (Optimized for PWM amplifier integration with superimposed dither)

• Pilot Fluid Orientation Logic: Internal intake and internal drain configuration (Pilot fluid sourced internally, discharging directly back into return port T)

• Net Structural Assembly Mass: Approximately 1.1 kg (2.42 lbs)

Key Technical Advantages:

• Leakage-Free Solid Steel Ball-Seat Poppet Geometries: Unlike standard proportional sliding spool configurations vulnerable to dynamic clearance bypass leakage, the PMVP series utilizes heavy-duty hardened alloy tool steel poppets ground to mirror-smooth geometric tolerances. When de-energized or set to holding posture, the ball-on-seat arrangement locks down with absolute structural tightness, eliminating internal drift and proving ideal for critical accumulator lockouts and load-holding networks.

• Wet-Pin Proportional Actuator with Ultra-Low Hysteresis ($\le 2\%$): The proportional solenoid assembly features a wet-pin armature layout where the moving core operates entirely immersed in hydraulic fluid for maximum cooling and lubrication. Backed by computer-modeled magnetic flux density management and precise frame tolerances, mechanical hysteresis is compressed to $\le 2\%$, ensuring high linearity and repeatability.

• Dynamic Servo-Piston Pilot Attenuation Technology: The internal staging comprises a primary poppet, a control spring matrix, a responsive internal servo-piston, and an upstream proportional pilot stage. During sharp current step-changes, the servo-piston exerts a dynamic fluid buffering effect that dampens pilot chamber fluid pulses. This suppresses acoustic humming and hydraulic oscillation across the full 0-450 bar spectrum.

• Monoblock High-Tensile Machined Cartridge Enclosure: The complete structural body is milled from high-alloy structural steel bars using multi-axis CNC turn-mill technology and finished with a hard-anodized or zinc-plated anti-corrosion outer shell. This compact modular configuration allows B2B design engineers to integrate the valve directly into complex manifold blocks, saving physical layout envelopes and piping overheads.

Application Areas:

• Precision Industrial Machine Tools & Clamp Arrays: Proportional infinitely variable multi-stage pressure profiling for plastic injection molders, die-casting machinery, and automated CNC hydraulic clamping power packs.

• Heavy Mobile Infrastructure & Deep-Mining Machinery: Proportional pilot pressure control for heavy tunnel boring cutter-heads, asphalt pavers, and the high-torque hydrostatic closed-loop pumps of exploratory drilling rigs.

• Aerospace and Automotive Component Dynamometers: Variable load-cycle simulation rigs, burst testers, and structural component fatigue benches requiring fast-acting high-pressure proportional control.

Expert Maintenance Tips:

• Mandatorily Execute Solenoid Air Bleeding Prior to First Energization to Prevent Coil Burnout: Following installation and before applying electrical power, you must back out the air-vent plug at the rear end of the proportional solenoid until all trapped air escapes and clean hydraulic oil flows out continuously! Trapped air pockets induce severe pressure chattering due to pneumatic compression and cause localized overheating by disrupting fluid thermal convection, which can burn out the 24V DC coil in a short time.

• Always Drive the G24 Solenoid via a Dedicated PWM Amplifier with Superimposed Dither: To achieve the low $\le 2\%$ hysteresis rating, never operate the proportional coil using a basic constant-voltage DC power source. The valve must be paired with a Pulse-Width Modulation (PWM) proportional controller outputting an adjustable dither signal, with an optimized dither frequency set to 50-70 Hz. Dither maintains microscopic high-frequency oscillation of the armature, neutralizing static mechanical friction and maximizing response accuracy.

• Enforce Absolute Zero-Tolerance Fluid Filtration to Block Orifice Plugging Hazards: Because the PMVP employs a pilot-operated staging layout, it contains narrow internal pilot damping orifices. If fluid conditioning degrades, ambient particulates, oxidation scales, or microscopic wear debris can instantly plug these tiny ports. This prevents the pilot stage from venting, causing the valve to lock up and triggering uncontrollable circuit over-pressurization (which risks fracturing pump housings or hoses). Maintain circuit fluid cleanlines at or above absolute $\beta_{10} \ge 100$ (10-micron absolute filtration metrics) and replace filter elements at scheduled runtime intervals.