VMQ145S Vickers Eaton VMQ Series Triple Vane Pump Replacement

The LIC Hydraulic VMQ145 series triple fixed displacement vane pump is engineered as a premier, heavy-duty hydraulic power solution for high-pressure industrial and mobile applications. This product delivers a 100% drop-in, seamless interchangeability with the original Eaton Vickers VMQ series in terms of mounting dimensions, port configurations, and performance ratings.

Designed specifically as a cost-effective, high-reliability alternative for global B2B buyers, every VMQ triple pump manufactured by LIC undergoes 100% rigorous simulation testing under full load conditions. This guarantees that our pumps replicate the precise volumetric efficiency, low noise signature, and rugged durability of the original equipment, eliminating critical downtime and optimizing your supply chain efficiency.

Technical Specifications

Accurate technical configuration breakdown derived from catalog data for model VMQ145S195B00500BBCANR00A032:

• Product Series: VMQ Series Triple Fixed Displacement Vane Pump

• Frame Size Combination: VMQ145S (Shaft End P1 + Intermediary P2 + Cover End P3)

• Shaft End Displacement (P1): 195 cm³/r

• Intermediary Displacement (P2): 050 (50 cm³/r)

• Cover End Displacement (P3): Determined by specific rear tail code (standard range 10-32 cm³/r)

• Shaft End (P1) Rated Pressure: 280 bar (4000 psi)

• Shaft End (P1) Peak Pressure: 310 bar (4500 psi)

• Intermediary (P2) Rated Pressure: 293 bar (4250 psi)

• Maximum Continuous Speed: 1800 rpm

• Rotation (Viewed from Shaft End): R (Right Hand / Clockwise)

• Mounting Flange: SAE Standard Flange

• Port Connections: SAE 4-bolt Flange Connections

Key Technical Advantages

• Intra-Vane Design & Modular Cartridge Architecture: Utilizing a high-tensile ductile iron housing paired with an intra-vane cartridge design, the VMQ145 significantly reduces vane tip loading at high pressures. The fully modular design allows for effortless field servicing; users can replace individual cartridge kits without removing the entire pump housing from the machine.

• Hydraulically Balanced Flexible Side Plates: LIC implements advanced flexible side plate technology that automatically adjusts axial clearances based on operating pressure. This minimizes internal cross-port leakage, ensuring the pump maintains an ultra-high volumetric and mechanical efficiency exceeding 90%, even when operating continuously at 280 bar.

• Bimetallic Vanes & Noise-Attenuating Fluid Paths: The vane tips feature a premium bimetallic compound that dramatically lowers the friction coefficient against the stator’s internal cam ring. Combined with hydro-dynamically optimized internal inlet and outlet fluid geometry, pressure pulsations are suppressed, resulting in an operating noise level 3 to 5 dB(A) lower than conventional vane pumps.

• Heavy-Duty, High-Load Bearings: To withstand the harsh radial and axial forces common in mobile machinery belt or gear drives, LIC integrates upgraded, premium-tier heavy-duty bearings at the front shaft. This enhancement ensures superior shaft alignment and extends the continuous operating lifespan under extreme working conditions.

Application Areas

The VMQ145 triple vane pump is uniquely qualified for sophisticated hydraulic systems that mandate independent multi-circuit oil supplies or combined high-low speed sequencing:

• Injection Molding & Die-Casting Machinery: Serving as the primary multi-circuit power core for clamping, injection, and ejection operations.

• Construction & Heavy Mobility Equipment: Powering auxiliary circuits and hydraulic braking systems in large excavators, rotary drilling rigs, and asphalt pavers.

• Marine & Port Equipment: Driving deck winches, marine cranes, and steering gear hydraulic power units (HPUs).

• Scrap Shears & Recycling Machinery: Facilitating high-pressure cutting strokes combined with high-flow, low-pressure rapid cylinder retraction.

Expert Maintenance Tips

• Pre-Lubrication & Initial Priming: Prior to initial commissioning or restarting after a prolonged shutdown, the pump housing must be fully primed with clean hydraulic fluid through the inlet or case drain port. Manually rotate the shaft a few turns to coat internal components. Utilize an “inching” method during startup, allowing the pump to idle at low pressure with zero load for 5-10 minutes to evacuate trapped air completely.

• Fluid Cleanliness Rigor: High-pressure vane pumps are sensitive to particulate contamination. The system’s fluid cleanliness level must be strictly maintained at or above ISO 4406 19/17/14 (NAS Class 8). It is highly recommended to install a 150-μm suction strainer and a high-precision 10-μm return-line filter to capture wear particles.

• Thermal Monitoring: Ensure the continuous operating oil temperature remains strictly within the 30°C to 60°C range. If oil temperatures spike beyond 80°C, the fluid viscosity drops below critical limits, breaking down the hydrodynamic oil film required between the vanes and the cam ring, which induces accelerated catastrophic wear.