Hengmeisi / HMS Industrial Hydraulic Pumps and Equipment

Engineering selection and specification of Hengmeisi / HMS industrial hydraulic gear pumps, motors and fluid power units from China.

Hengmeisi / HMS 1PF2G2 Series Gear Pumps

Hengmeisi / HMS 1PF2G2 series hydraulic gear pumps operate at working pressures up to 210 bar. Units feature precision external gears, high-strength bearing supports and standardized SAE mounting flanges for reliable operation in industrial machine fluid systems.

Displacement ratings for 1PF2G2 series range from 4 to 28 cm3/rev for machine units.
Maximum continuous operating pressure reaches 210 bar across standard hydraulic oils.
Shaft rotation options provide either clockwise or counter-clockwise drive direction.
Standardized mounting flanges and threaded fluid ports ensure direct machine assembly.

Hengmeisi / HMS QXM Series Internal Gear Pumps

Hengmeisi / HMS QXM series internal gear pumps deliver low noise and minimal flow pulsation in hydraulic systems. Covering sizes from QXM11 to QXM42 with pressures up to 320 bar, these units suit plastics machinery, industrial presses and tooling lines.

Internal gear tooth geometry ensures smooth operation with reduced acoustic emissions.
Continuous operating pressure ratings reach up to 320 bar for demanding applications.
Displacement choices spanning QXM11 through QXM42 meet diverse flow requirements.
Advanced fluid porting minimizes pressure ripples across wide operational speeds.

Hengmeisi / HMS M7600 Heavy Industrial Gear Pumps

Hengmeisi / HMS M7600 and P124 heavy-duty industrial gear pumps are engineered for demanding mobile machinery and heavy plant applications. Models F100, F112 and F80 provide stable fluid delivery in metallurgical rolling mills and material handling systems.

High-strength ductile housing structure withstands intense peak fluid shocks.
Precision splined or keyed drive shafts transfer high torque smoothly to gears.
Integrated wear plates balance axial clearances to maintain high pump efficiency.
Standard SAE flange port configurations simplify field inspection and overhaul.

Hengmeisi / HMS V and V20 Series Vane Pumps

Hengmeisi / HMS V, V20 and T6 series hydraulic vane pumps provide smooth fluid delivery with low sound levels across medium and high pressure duties. The replaceable cartridge design enables rapid servicing of pumping elements without piping disassembly.

Modular cartridge kits permit swift on-site maintenance without line removal.
Twelve-vane rotor configuration generates steady flow with minimal pressure ripple.
Hydraulically balanced rotor assembly reduces bearing wear and extends uptime.
Broad hydraulic fluid viscosity range supports versatile plant machinery setups.

Hengmeisi / HMS Axial Piston Pumps A4VSO and K3V

Hengmeisi / HMS variable and fixed displacement axial piston pumps (including A4VSO, A2FO, K3V and K7V series) are built for heavy high-pressure circuits up to 350 bar. They power main drives in heavy industrial presses, mobile machinery and plant units.

Working pressures up to 350 bar support demanding heavy hydraulic drive duties.
Multiple control options adjust flow and pressure automatically to machine load.
Precision swashplate and piston cylinder barrel yield high overall efficiency.
Heavy-duty bearings absorb axial and radial forces during continuous operation.

Hengmeisi / HMS Directional and Proportional Valves

Hengmeisi / HMS valve equipment encompasses directional solenoid valves, 4WRA proportional valves, relief modules and modular pressure controls. These components deliver precise flow regulation and dependable positioning across multi-axis machine tool circuits.

Subplate mounting conforming to ISO 4401 standards ensures direct interchange.
Durable DC and AC wet-pin solenoids provide quick response and sealed protection.
Proportional 4WRA spools enable smooth continuous flow and direction tailoring.
High-grade sealing rings prevent internal leakage between modular valve stacks.

Hydraulic Sizing and Model Code Verification for Hengmeisi Pumps

Selecting industrial hydraulic pumps from Wuhan Hengmeisi (HMS brand) begins with exact nameplate model code verification. Series designations like 1PF2G2, QXM and M7600 define displacement volume per revolution, shaft drive rotation direction, mounting flange geometry and port threads.

Machine tool lubrication circuits and press auxiliary loops routinely utilize 1PF2G2 external gear pumps delivering between 4 and 28 cm3/rev at pressures reaching 210 bar.

Injection molding machinery and tooling operations prioritize quiet fluid delivery, making QXM internal gear pumps the preferred selection due to their smooth fluid transfer up to 320 bar.

Mechanical Alignment and Installation Guidelines for HMS Units

Correct mounting of Hengmeisi / HMS fluid power pumps demands precise angular and radial alignment between the electric motor drive and the pump shaft. Flexible couplings compensate for minor thermal shifts and prevent premature load stress on internal journal bushings.

Series 1PF2G2 units adhere to international SAE and ISO flange configurations, enabling straightforward drop-in replacement on European and Asian machinery without custom adapter machining.

Suction piping must remain short with generous bend radii to avoid fluid restrictions, ensuring smooth oil intake without acoustic flutter or cavitation.

Hydraulic Fluid Quality and Thermal Operating Limits

Service longevity of gears, internal bushings and swashplate assemblies in Hengmeisi / HMS equipment relies heavily on oil cleanliness. Plants should maintain fluid purity to ISO 4406 rating 19/16 or better, using 10 to 16 micron pressure filtration and 25 micron suction strainers.

Mineral-based hydraulic oils with kinematic viscosity ranging between 20 and 100 mm2/s at temperatures between +20 and +65 degrees Celsius deliver optimal hydrodynamic film lubrication.

Sustained fluid overheating above +70 degrees Celsius degrades viscosity, accelerating wear on lateral balance plates and lowering volumetric efficiency.

System Troubleshooting and Cavitation Prevention in Pump Loops

Unusual operational noise, localized line vibration or fluid aeration in hydraulic reservoirs indicates abnormal operating conditions in Hengmeisi pump units.

Metallic buzzing points to suction flow restriction or atmospheric air ingress across pipe joints, causing destructive bubble collapse across gear teeth flanks.

Uneven pressure output from 1PF2G2 or M7600 pumps generally stems from particulate contamination in relief valves or wear along bronze side thrust plates, requiring prompt inspection of internal clearances and suction line integrity.

Preventive Maintenance and Wear Component Renewal Schedules

Structured maintenance schedules for Hengmeisi / HMS fluid machinery involve periodic monitoring of operational pressure, bearing temperature and seal integrity.

Overhauls on QXM and 1PF2G2 assemblies include thorough visual evaluation of tooth profiles, drive splines and lateral thrust compensator faces.

Radial shaft seals constructed from durable FKM fluoroelastomer or NBR polymers must be renewed during major service intervals to prevent external oil weeping and maintain air-tight fluid boundaries under continuous heavy cyclic duty.

Integration of Hydraulic Power Packs and 4WRA Directional Control

Pairing Hengmeisi gear pumps with 4WRA proportional valves and D-series directional spools yields highly responsive motion control for automated machinery.

Standard ISO 4401 subplate interfaces simplify compact manifold assembly, eliminating sprawling external pipe runs while reducing potential leak points.

Configuring proportional spool acceleration and deceleration ramps prevents hydraulic pressure spikes within cylinders, protecting heavy machine frames and tooling dies during high-speed directional reversals.

Hengmeisi / HMS and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Hengmeisi / HMS and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.