Introduction
Parker A-LOK instrumentation fittings are available in multiple sizes, configurations, end connections, and material grades.
Understanding Parker fitting part numbers helps EPC contractors, procurement teams, and instrumentation engineers select the correct fitting for high-pressure gas systems.
What is a Parker A-LOK Fitting?
Parker A-LOK fittings are double ferrule compression fittings widely used in:
- CNG stations
- CGD infrastructure
- industrial gas systems
- compressor skids
- instrumentation panels
They are designed for leak-tight performance in high-pressure applications.
Typical Parker Part Number Structure
A Parker fitting part number generally includes:
- fitting type
- tubing size
- thread size
- configuration
- material grade
Each code helps identify the exact fitting specification.
Common Parker Fitting Configurations
Male Connector
Tube to male threaded connection.
Female Connector
Tube to female threaded connection.
Union
Connects two tubing lines.
Elbow
Used where directional change is required.
Tee
Used for branch connections.
Common Material Grades
Most CGD and CNG systems use:
- SS316
- SS316L
because of corrosion resistance and high-pressure compatibility.
Why Correct Part Selection Matters
Incorrect fitting selection can lead to:
- leakage
- installation mismatch
- thread incompatibility
- pressure integrity issues
Engineering teams should always verify:
- tubing OD
- thread type
- pressure rating
- material compatibility
before final procurement.
Conclusion
Understanding Parker A-LOK part numbers helps improve procurement accuracy and installation reliability.
Correct fitting selection is essential for maintaining safety and long-term performance in high-pressure gas systems.