The Sumitomo QT Series Internal Gear Pump is a cornerstone of high-efficiency hydraulic systems. Engineered for excellence, these pumps are designed to transform system functionality through superior durability and ultra-low noise performance. Distributed by THM Hydraulics, the QT Series is the trusted choice for demanding industrial applications, including construction, heavy machinery, manufacturing, and mobile hydraulics

Key Features of the QT Series

• Ultra-Low Noise Performance: Engineered for quiet operation, significantly reducing workplace sound disturbance.
• Excellent Durability: Built with high-quality materials to withstand harsh operating conditions and extend service life.
• Low Pulsation: Ensures smooth fluid movement and precise control.
• Wide Versatility: Capable of handling a variety of oils, fuels, and high-viscosity fluids.

Advanced Internal Gear Design

The QT Series utilizes a sophisticated crescent internal gear pump design. This involves a smaller outer rotor rotating inside a larger inner idler gear. A specialized arched barrier separates the inlet and outlet ports, which allows for:

• High Efficiency: Minimal energy loss compared to standard designs.
• Compact Size: Lightweight construction (CVD Series) for easy integration into existing hydraulic circuits.
• Superior Viscosity Handling: Ideal for systems requiring precision fluid management.

Internal vs. External Gear Pumps: The Advantage

While both are positive displacement pumps, the Internal Gear Pump (IGP) offers distinct advantages over external counterparts. Unlike external gear pumps—which use two identical spinning gears—the QT Series' rotor-and-idler setup provides smoother operation and less oscillation. While external pumps are common for low-viscous fluids, the Sumitomo QT Series offers higher versatility for both hydraulic and mechanical applications.

Integrated Safety Features

For enhanced system protection, the QT Series can be equipped with an integrated relief valve. This vital component protects the pump and downstream machinery from overpressure by recirculating excess fluid back to the inlet, ensuring reliable and safe operation in high-pressure environments.