1. The shaft clearance compensation design can automatically adjust the displacement of the pump according to the set pressure 2. Built-in pressure regulator, the system does not need to install pressure regulator valve. 3. It has the characteristics of high efficiency, energy conservation, safety and reliability.4. Suitable for grinding machines, automatic lathes, pres-sure machine... https://www.rectehydraulic.com/vane-water-pump-08-25-product/