DL-8 Type Lower Vehicle Multi-way Valve

I. Product Introduction

The multi-way valve adopts an integrated modular overall design, suitable for operating vehicle hydraulic systems, providing stable complete hydraulic system solutions for vehicle manufacturers. The product combination flexibility is strong, allowing flexible assembly and combination of valve body units according to on-site hydraulic function control requirements, adapting to diversified hydraulic control conditions and customized assembly for vehicle-mounted hydraulic systems.

II. Valve Body Category Classification

The multi-way valve is compatible with two mainstream control structures for differentiated hydraulic control requirements:

1. Load-sensitive manual multi-directional switching valve: Operation is not affected by load pressure or pump output flow, with stable control, suitable for manual multi-way oil circuit directional control;

2. Electro-proportional control valve: Equipped with non-saturated control function, electrically and precisely controls oil circuit pressure and flow, suitable for automated closed-loop hydraulic control conditions.

Currently, domestic multi-way valve industry technology focuses on application implementation, with mature valve body application processes, while valve body self-developed structural design and performance optimization still have room for upgrade and improvement.

III. Internal Structure Configuration

The valve body group has built-in combined working valve plates with integrated assembly layout; the valve body inlet block has a built-in three-way pressure compensation bypass relief valve, integrated hydraulic logic control elements, working together to complete oil circuit pressure compensation, flow bypass pressure regulation, and overload relief protection, ensuring stable coordinated operation of multi-way oil circuits.

IV. Oil Circuit Pressure Compensation Working Principle

1. Neutral standby state: When the multi-directional switching valve stops operation and all valve plates are in neutral position, the valve body relies on 12BAR compensation pressure to bypass and divert excess medium flow from the main oil circuit, stabilizing and protecting main oil circuit pressure;

2. Load working state: After the valve body starts operation, it relies on real-time load pressure to reduce the bypass flow diameter, linked to adjust oil circuit output flow, matching load conditions to supply appropriate flow, supplying oil on demand, saving energy and stabilizing pressure, adapting to vehicle-mounted load dynamic change conditions.

V. Product Features

1. Modular integrated design with one-piece valve group structure, convenient vehicle assembly, reducing vehicle hydraulic pipeline layout space;

2. Strong combination adaptability, valve plates freely assembled, building multi-way directional, pressure regulation, and relief hydraulic control circuits as needed;

3. Wide working condition adaptability, available in manual load-sensitive and electro-proportional models, suitable for manual and automated vehicle hydraulic systems;

4. Built-in pressure compensation function with 12BAR reference compensation pressure, neutral bypass unloading, and load-adaptive flow supply;

5. Built-in logic relief elements, automatic pressure relief on oil circuit overload, protecting oil pump, valve plates, and vehicle hydraulic components;

6. Operation unaffected by pump flow or base load interference, precise oil circuit control, smooth start-stop and speed regulation of operating vehicles.

VI. Application Scope

Mainly used with various engineering operating vehicles and specialized vehicle hydraulic control systems, completing multi-way oil circuit directional switching, flow regulation, pressure stabilization, and overload protection, suitable for vehicle-mounted lifting, slewing, push-pull and other hydraulic actuator coordinated control, and vehicle hydraulic energy storage oil circuit integrated control.

VII. Usage Precautions

1. Assembled valve plates must match the system rated oil pressure, with unified matching specification valve plates, to avoid pressure regulation imbalance caused by mismatched valve plate flow;

2. Control the system reference oil pressure, ensure the neutral compensation pressure is maintained at 12BAR range, to ensure normal bypass diversion function;

3. Electro-proportional models must match adaptive electrical control signals to avoid non-saturated control function failure due to signal deviation;

4. Connected oil circuits must be equipped with filtration devices to prevent impurities from entering valve plates and jamming pressure compensation valve cores;

5. The valve body must not be in neutral high-pressure standby for extended periods; promptly release system pressure during long-term shutdown to slow relief element aging;

6. When modifying and combining valve bodies, follow modular assembly standards, tighten oil circuit interfaces, to prevent oil leakage caused by vehicle vibration;

7. Regularly verify load-linked flow accuracy, adapt to operating vehicle load changes, and optimize oil circuit supply efficiency.