Six way multi way valve for Crane

Six way multi way valve, Multi way valve is a combination valve used in hydraulic systems, mainly composed of two or more directional valves. It changes the flow path of hydraulic oil by controlling the movement of the valve core, thereby achieving precise control of the actuator. The following is a detailed analysis of its working principle:

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1. Basic working principle

Multi way valves drive the valve core to move manually, pneumatically, hydraulically, or electronically, thereby controlling the throttling and on/off of the oil port. The movement of the valve core will change the direction, flow rate, or pressure of hydraulic oil, thereby controlling the movement of the actuator.

2. Pressure compensation function

In multi way valves, pressure compensation function is one of the key features. When the multi way valve stops operating and all valves are in the neutral position, the built-in three-way pressure compensation bypass relief valve will bypass the main oil flow with compensation pressure (usually 6-12BAR). When a certain valve is working, the load pressure will decrease at the bypass port, providing the required flow according to the load demand.

3. Load sensing mechanism

The load sensing shuttle valve transmits the load pressure of each working valve plate to the pressure compensation bypass relief valve of the inlet valve block. This mechanism ensures that the flow rate of each valve remains constant and is not affected by load changes when multiple valves are working simultaneously.

4. Control mode

There are various control methods for multi way valves, including:

Manual control: Directly control the movement of the valve core through a lever mechanism, suitable for low-pressure, medium to low flow applications.

Electromagnetic control: Using electrical signals to operate the pilot valve and drive the main valve core to achieve precise control.

Hydraulic control: using the pressure of hydraulic oil to drive the valve core, suitable for high-pressure and high flow systems.

5. Applications and advantages

Multi way valves are widely used in engineering machinery, lifting and transportation machinery and other fields, with the following advantages:

Compact structure: integrates multiple functional valves to reduce system complexity.

Accurate control: High precision control is achieved through pressure compensation and load sensing mechanisms.

Easy maintenance: Modular design facilitates disassembly and cleaning.

Summary: Multi way valves achieve precise control of hydraulic systems through the movement of valve cores and pressure compensation mechanisms. They are widely used in various mechanical equipment and have advantages such as compact structure, precise control, and easy maintenance.