We provide both positive flow control (PFC) and negative flow control (NFC) system for middle and large excavator(20~60ton) application.
Utilizing Hengli’s pump and mobile valve, the superior controllability and the fuel saving can be achieved.
The NFC system uses a measuring orifice in the bypass oil flow to generate a pressure signal, which influences the swash angle of the regulating pump.
In PFC systems the control signal is used to control both valve and pump. A complex evaluation control consisting of valve cascades in combination with software determines a certain swash angle for the pump.
Hengli has rich experience in both control systems, can provide you full qualified hydraulic solutions to save your time.
1×HVME270（monoblock control valve）
1×MFD（pilot control manifold）
We provide different type solutions based on different requirements and applications;
Lighter and more compact design to save weight and space for the machine;
Higher efficiency and more energy saving;
Full system solution instead of components, better controllability
We are dedicated to provide the hydraulic system solution and hydraulic products with high quality and high efficiency.
We provide valuable service to all parts of the cooperation with customers, pre-sales and after-sales service request, please kindly email to us at: firstname.lastname@example.org