Interlocking Mechanism:

• The valve works by linking the vehicle's air brake system with the loading system.
• It ensures that the brakes remain engaged (locked) whenever the loading arms or hoses are connected.
• Disconnection of the hoses/loading arms releases the interlock, allowing the brakes to be disengaged.

Integration with Safety Devices:

• Typically used alongside a guard bar or other mechanical/electrical safety interlocks.
• The guard bar or similar device provides an additional layer of protection by physically preventing the vehicle from moving when the system is engaged.

Prevention of Drive-Offs:

• The valve prevents accidental movement of the vehicle during critical operations, minimizing risks of injury, spills, or damage to equipment.

Robust Design:

• Built to withstand the pressures and conditions of industrial pneumatic systems.
• Compatible with standard fittings and hoses used in vehicle and loading systems.

Typical Application:

• Commonly found in industries such as fuel distribution, chemical transport, and bulk material handling, where bottom loading is used.
• Ensures compliance with safety regulations and operational best practices.