THM – A4VSO – Variable Displacement Pump

Engineered for uncompromising performance in open-circuit hydrostatic transmissions, the THM Huade A4VSO Variable Displacement Pump delivers precise flow control and exceptional energy efficiency. Utilizing a highly responsive swash plate design, this pump allows fluid flow to be infinitely variable by adjusting the swash plate angle, perfectly proportional to the input speed and displacement. With a robust maximum pressure rating of 350 bar, the A4VSO series provides the raw power and exact hydraulic control required for the most demanding industrial and mobile applications.

Core Technical Specifications:-

Pump Architecture: Variable Displacement Axial Piston (Swash Plate Design)
System Design: Open-Circuit Applications
Maximum Working Pressure: 350 bar
Maximum Speed Range: Up to 3000 r/min

Key Features & Operational Benefits:-

Advanced Radial Pressure Compensation: Maintains exceptionally high volumetric efficiency, even when operating at very low speeds or handling low-viscosity hydraulic fluids.
Ultra-Low Noise Operation: Constructed from heavy-duty, high-strength cast iron and featuring a unique internal noise-absorbing design, ensuring a remarkably quiet industrial workspace.
Stable, Low-Pulsation Output: Engineered to minimize flow rate and pressure pulsation, guaranteeing a smooth and highly predictable hydraulic output across all operating speeds.
Rugged Contaminant Resistance: Highly insensitive to oil pollution and fluid contamination, drastically reducing maintenance downtime and significantly extending the pump's service life.
Energy-Saving Integration: The highly efficient architecture makes it an ideal fit for modern energy-saving systems, particularly those utilizing sub-servo frequency conversions.

A4VSO High-Speed Type (For Servo Inverter Drives):-

For specialized, high-velocity applications, we offer the A4VSO High-Speed variant. This model is meticulously developed to meet the rigorous demands of high-voltage and high-speed servo inverter drives:

Optimized Fluid Dynamics: Features completely re-engineered internal oil passages and an enlarged suction mouth to perfectly manage the massive fluid flow required under high-speed, high-pressure conditions.
Enhanced Dynamic Stability: The internal structure is optimized to improve the dynamic stability of the pressure compensation system, greatly increasing the operational reliability and countability of the product.

Ideal Industry Applications:-

Thanks to its compact size, rapid operational speed, and extended lifespan, the THM A4VSO is widely trusted across heavy industries, including: