12345 Passenger Door Emergency Release Valve for Bus and Truck

Part Number: 12345 | Brand: hengjing

Passenger door emergency release valve for bus and truck pneumatic door systems. Pulling the handle dumps air from the door cylinder so the door can be pushed open by hand, independent of the driver's controls and independent of vehicle power. It is the component that lets passengers get out when the electrical system is dead or the driver cannot reach the controls, which is why it is an inspection item rather than a convenience part, and why a sticking or leaking one gets a bus red-tagged.

• Purely pneumatic operation with no electrical dependency, so it works with the battery disconnected, the ignition off, or the harness burned
• Manual pull actuation that vents the door cylinder directly, allowing the door to be pushed open by hand without tools
• Compact 0.1 kg body sized for the standard emergency valve pocket beside the passenger door

Specifications

The manufacturer has not published port thread size, working pressure range, body material, or overall dimensions for this valve. Those figures are omitted here rather than estimated. Contact us with photos of the valve you are replacing and we will confirm the match before shipping.

Fitment and Installation

• Vehicle type: Bus, coach, and truck pneumatic passenger door systems.
• Function: Vents the door cylinder on manual pull, releasing the door so it can be pushed open by hand.
• Ports: Thread size and port count are not published. Measure your existing valve or send photos before ordering.
• Working pressure: Not published by the manufacturer. Confirm against your door system's regulated supply pressure.
• Testing after installation, do not skip this: Cycle the emergency release with the system at full pressure and confirm the door releases and can be pushed open by hand. Then confirm the valve resets and the door returns to normal driver control with no leak. An emergency egress device that has not been function tested after service is not an emergency egress device.
• When to replace: Any time the valve leaks, sticks, fails to reset, or fails an inspection cycle. This is a safety component, so replace rather than free it up and put it back.
• Before you order: Confirm port thread size, mounting orientation, handle style, and pocket dimensions against the valve you are removing.

Replaces and Cross-References

No manufacturer cross-reference numbers are published for this valve. Match on port thread size, mounting pattern, handle style, and body dimensions rather than on part number.

Because this is an emergency egress component, do not substitute on appearance alone. Send us photos of the valve you are replacing, including the ports and any markings on the body, and we will confirm the match before shipping.

Fleet and Shop Pricing

The price shown is single-unit. We supply school districts, transit agencies, bus operators, and repair shops directly. Emergency valves are replaced in batches during inspection season, so contact us for quantity pricing or standing replenishment across your fleet, and we will quote your account.

Shipping

Ships small parcel ground at 0.1 kg. Multiple valves consolidate into a single carton at a lower cost per unit, so ordering inspection-season quantities together is worth doing where your budget cycle allows.