Load sensitive proportional multi way directional valve 666
3series
Working pressure Pmax 420bar
Flow Qmax 80/120 L/min
Specification 3 series combination type
overview
ZLSL and ZLSV negative wear sensitive proportional multi way directional valves are mainly used in the field of electrohydraulic control of construction machinery, controlling the direction and speed of movement of hydraulic cylinders or motors. It has functions such as electronic control, hydraulic control, and manual operation, allowing multiple execution components to work simultaneously and independently at different speeds and pressures until the maximum flow rate of the pump source is reached. The application of load sensitive technology in hydraulic systems mainly aims to achieve load independent control of the flow rate of actuator components. Load sensing mechanism (fixed differential pressure reducing smoke)
Make the outlet pressure continuously match the changing load during operation, with one side continuously acting
The load signal and spring force act on the other side of the constant differential pressure reducing valve outlet pressure. The outlet pressure of the constant differential pressure reducing valve minus the load pressure equals the spring force, which means that the pressure difference before and after the throttling edge of the directional throttle valve is a fixed value. Therefore, the flow through the directional throttle valve is only proportional to the opening amount of this valve core.
When the hydraulic system uses a constant pressure differential variable pump for oil supply, the load pressure of each directional valve is selected by the shuttle valve and the highest load pressure signal is transmitted to the load sensitive interface of the variable pump. Then, through the control of the pump's variable mechanism, the constant pressure differential variable pump only provides the pressure required by the hydraulic system
Compared with the ZLSL type valve, the response of the ZLSV type valve is relatively slower because the pump variable mechanism needs to adjust the action, which results in delayed action. However, the energy-saving effect of ZLSV type valves will be better.
The load sensitive proportional multi way directional valve is a combination type valve, usually composed of three functions: oil inlet coupling, T-piece, and tail plate. When needed, it can also be done in the work piece
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