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Sealco Tractor Protection Valve - 7700
Sealco 7700 Double Check Valve
The Sealco 7700 is a durable double check valve designed for commercial vehicle and industrial pneumatic systems. It ensures automatic selection of the higher-pressure source from two supply lines, providing uninterrupted airflow to critical circuits while preventing backflow between sources.
Key Features & Benefits
- Automatic source selection: Delivers air from the higher-pressure supply for consistent operation.
- Prevents cross-flow: Protects each air source by preventing air from flowing back into the alternate supply line.
- Compact inline design: Easy to install in truck, trailer, or industrial pneumatic systems.
- Standard porting: Compatible with common commercial vehicle air plumbing.
- Rugged construction: Engineered to withstand heavy-duty operating environments.
Applications
- Air-brake and control systems requiring redundant supply protection
- Auxiliary and suspension air circuits
- Industrial and commercial pneumatic systems needing uninterrupted airflow
Why Choose Sealco?
Sealco products are engineered for reliability, durability, and consistent performance in demanding commercial vehicle and heavy-duty pneumatic systems. With a strong focus on quality and proven engineering, Sealco provides dependable valves and components designed to perform in the harsh operating conditions found in trucks, trailers, and other heavy-vehicle applications. Trusted by fleet operators, workshops, and OEMs, Sealco delivers professional-grade products that help maintain safe, efficient, and reliable vehicle systems.
| Type: | Qty: | Size: |
| Supply In | 1 | 1/4" NPT |
| Supply Out | 1 | 1/2" NPT |
| Control In | 1 | 1/4" NPT |
| Control Out | 1 | 1/2" NPT |
Prevents loss of tractor brakes in case of trailer breakaway or loss of air pressure. Automatically closes off lines and vents trailer side supply between 20 to 45 PSI.