UNJ Thread Check Valve | Aviation Fuel Check Valve, Replacement for MS28884A12
Our UNJ Thread Aviation Fuel Check Valve is a high-performance replacement part designed to directly substitute the MS28884A12 check valve, complying with MIL-V-7899 aviation specifications. It is specifically engineered for aircraft fuel systems, ensuring reliable performance, lightweight design, and excellent compatibility with aviation fuel, oil, and hydrocarbons.
With strict quality control and precision manufacturing, this check valve meets all the key specifications of MS28884A12, making it a cost-effective and reliable alternative for helicopter and fixed-wing aircraft fuel system maintenance and replacement.
Parameter Specification Table:
| English Code | Parameter Item | Parameter Value |
|---|---|---|
| AAJF | Thread Direction | Right-hand all ends |
| ADQU | Flow Control Device | DISK |
| ADSU | Disk Loading Method | Spring |
| AEHZ | Maximum Operating Temp | 160.0 deg fahrenheit |
| AHNC | Connection Style | Flared (tube) all ends |
| AQLR | Valve Operation Method | Automatic |
| AWLS | Connection Type | Threaded external tube all ends |
| BBJX | Mounting Position | Horizontal or vertical |
| CMLP | Thread Quantity per Inch | 12 all ends |
| CQGM | Maximum Operating Pressure | 300.0 pounds per square inch |
| CQJX | Nominal Thread Size | 1.875 inches all ends |
| CQRB | Seat Angle | 37.0 degrees all ends |
| MATT | Material | Aluminum alloy overall |
| MEDA | Media for Which Designed | Fuel/oil, hydrocarbon |
| STYL | Style Designator | Straight thru |
| THSD | Thread Series Designator | UNJ all ends |
This is an automatic UNJ threaded check valve engineered for aircraft fuel and hydrocarbon oil systems, designed as a reliable drop-in replacement for MS28884A12.
It features a spring-loaded disk mechanism, 37° flared tube connections, 1.875 UNJ threads (12 TPI, right-hand), and an aluminum alloy body.
With a maximum operating pressure of 300 PSI and temperature rating of 160°F, it supports horizontal/vertical mounting and ensures dependable one-way flow control in aviation fuel and oil circuits.
Why Choose Us?
- Direct replacement for MS28884A12, no pipeline modification, saving maintenance time and cost.
- Aviation-grade material and precision manufacturing, ensuring long service life and reliable performance in harsh airborne environments.
- Complete specifications, customizable according to your specific requirements (thread size, pressure, temperature, material).
- Professional after-sales service, timely response to your questions and technical support for installation and use.
Welcome to contact us for more details, samples and competitive quotes! We are committed to providing high-quality aviation parts and reliable replacement solutions for global aviation customers.
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