Pneumatic hydraulic pumpZTGSeries

Aerohydraulic pumps have a wide range of applications, capable of filling water, oil, and chemical media. They are extensively used in pressure testing, blasting, and high-pressure injection fields. Driven by 3-8bar compressed air, they offer adjustable output pressure, automatic pressure maintenance, and can reach a maximum output pressure of 400MPa, making them suitable for explosion-proof areas.

Working Principle

The pneumatic hydraulic pump operates similarly to a supercharger, applying a very low pressure to a large-diameter air-driven piston. When this pressure acts on a small-area piston, it produces a high pressure. Through a two-position five-way air control directional valve, the supercharger pump can run continuously. The high-pressure plunger, controlled by a one-way valve, continuously discharges the fluid. The outlet pressure of the supercharger pump is related to the air-driven pressure. When the pressure between the driving section and the output fluid section reaches equilibrium, the supercharger pump stops running and no longer consumes air. Output hydraulic pressure = pressure ratio × driving air pressure. The outlet pressure can be set through a simple gas pressure reducing valve.

When export pressure increases, the pump slows down and exerts certain resistance on the differential piston. Once force equilibrium is achieved, the pump automatically stops running. When export pressure decreases or the driving air pressure increases, the pump automatically starts up and runs.