Priority valve

Working Principle and Core Advantages

Precise Flow Prioritization

During steering, the priority valve supplies the steering system with the required metered flow based on the steering gear's metering signal and real-time load demand. The flow output is stable and controllable, unaffected by changes in the pump flow, system pressure fluctuations, or the size of the steering load. The steering response is uniform, shock-free, and lag-free, with good control consistency.

Full Flow Supply in Non-Steering Conditions

When the vehicle is traveling straight or without steering operations, the priority valve automatically switches the oil circuit to supply all the oil from the pump to the working system. There is no throttling loss or unnecessary overflow, significantly reducing system energy consumption and heat generation, improving the overall machine's working efficiency, and achieving high efficiency and energy conservation.

Special Matching for Static and Dynamic Modes

Strictly distinguishes between static control and dynamic control modes, corresponding to the use of static and dynamic BZZ load sensing steering gears respectively. The signal matching is precise, and the control logic is stable, avoiding system interference and ensuring that the steering and working systems do not interfere with each other and operate in coordination.

Compact Structure and Low Pressure Loss

The integrated valve body design is compact, occupies less installation space, and has a simple pipeline connection. The internal flow channels are optimized, resulting in low pressure loss and high operating efficiency, effectively extending the service life of the hydraulic pump and other hydraulic components.

Stable Operation and Strong Anti-Pollution Capability

The valve core has high fit accuracy, reliable sealing, and excellent anti-pollution performance and durability. It is suitable for long-term continuous operation and complex working conditions, with low failure rates and easy maintenance.

Technical Parameters (General Range)

Nominal Flow: 80–250 L/min

Rated pressure: 16 MPa

Peak pressure: 20 MPa

Control pressure: 0.45 / 0.7 / 1.05 MPa

Applicable medium: 46#/68# Anti-wear hydraulic oil

Working oil temperature: -20℃ to 80℃

Adapted steering gear: BZZ series static/dynamic load sensing steering gear

Typical application fields

It is widely used in the hydraulic steering and working compound control systems of forklifts, loaders, bulldozers, agricultural machinery, construction machinery, heavy trucks and special operation vehicles, especially suitable for medium and large vehicles with high requirements for steering stability and energy-saving effects.