1. Product Overview
The Dixon Air King AM7 is an iron air hose fitting designed for universal coupling applications. This 2-lug universal coupling features a 3/4-inch NPT (National Pipe Taper) male end, providing a secure and reliable connection for air hoses in various industrial and commercial settings. It is constructed from durable iron, ensuring longevity and resistance to wear.
Image 1.1: Two Dixon Air King AM7 Iron Air Hose Fittings. These fittings are designed for robust air hose connections, featuring a universal 2-lug design and a 3/4-inch NPT male thread for secure attachment.
2. Specifications
Below are the key specifications for the Dixon Air King AM7 Iron Air Hose Fitting:
| Attribute | Detail |
|---|---|
| Brand | Dixon |
| Model | AM7 |
| Material | Iron |
| Connector Type | Universal Coupling (2-Lug) |
| Thread Type | NPT (National Pipe Taper) |
| Thread Size | 3/4 inch |
| End Type | Male |
| Exterior Finish | Alloy Steel |
| Number of Pieces | 2 (as typically sold in a pack) |
| Manufacturer | Dixon Valve & Coupling |
Image 2.1: Technical Drawing of Dixon Air King AM7 Fitting. This diagram illustrates the precise dimensions and design of the fitting, including the 3/4-inch NPT male thread and other critical measurements for proper installation and compatibility.
3. Safety Information
Always adhere to safety precautions when working with air pressure systems and fittings. Failure to do so can result in injury or equipment damage.
- Depressurize System: Ensure all air pressure is released from the system before attempting to install, remove, or maintain any fittings.
- Wear Protective Gear: Always wear appropriate personal protective equipment (PPE), including safety glasses, when working with air tools and hoses.
- Inspect Components: Before each use, inspect the fitting, hose, and connecting equipment for any signs of wear, damage, or corrosion. Do not use damaged components.
- Proper Sealing: Use appropriate thread sealant (e.g., PTFE tape or pipe dope) on NPT threads to ensure an airtight connection and prevent leaks.
- Secure Connections: Ensure all connections are fully engaged and secured before pressurizing the system.
- Temperature and Pressure Limits: Do not exceed the maximum recommended operating temperature or pressure for the fitting and the overall air system. Consult manufacturer specifications for specific limits.
4. Installation/Setup
Proper installation is crucial for the safe and efficient operation of the Dixon Air King AM7 fitting.
- Prepare Threads: Ensure the 3/4-inch NPT male threads of the AM7 fitting and the corresponding female threads on the receiving component are clean and free of debris.
- Apply Thread Sealant: Apply a suitable thread sealant (such as PTFE tape or pipe thread compound) to the male NPT threads of the AM7 fitting. Wrap PTFE tape clockwise around the threads for 2-3 turns, ensuring it does not extend past the first thread.
- Thread Engagement: Carefully thread the AM7 fitting into the female NPT port by hand until it is finger-tight.
- Tighten Connection: Using an appropriate wrench, tighten the fitting an additional 1 to 2 turns past finger-tight. Avoid overtightening, which can damage threads or crack the fitting. Refer to the technical drawing (Image 2.1) for hex dimensions if needed.
- Connect Hose: Once the male NPT end is securely installed, connect the air hose equipped with a compatible 2-lug universal coupling to the AM7 fitting. Ensure the lugs are fully engaged and the connection is secure.
- Test for Leaks: After installation, slowly pressurize the air system and check all connections for leaks using a soapy water solution. Bubbles indicate a leak that needs to be addressed by re-tightening or re-sealing.
5. Operation
The Dixon Air King AM7 fitting functions as a robust connection point within an air pressure system. Once properly installed and connected to a compatible air hose, its primary role is to maintain an airtight seal and facilitate the flow of compressed air.
- Airflow: The fitting allows for unrestricted airflow when properly connected.
- Secure Connection: The 2-lug universal coupling design ensures a quick yet secure connection to compatible hose ends, preventing accidental disconnections during operation.
- Pressure Retention: The NPT male thread, when correctly sealed, provides a tapered, leak-free connection that effectively retains system pressure.
Always ensure the system operates within its specified pressure and temperature limits.
6. Maintenance
Regular maintenance helps ensure the longevity and reliable performance of your Dixon Air King AM7 fitting.
- Routine Inspection: Periodically inspect the fitting for signs of wear, corrosion, cracks, or deformation. Pay close attention to the threads and the lug areas.
- Check for Leaks: Regularly check connections for air leaks, especially after any system adjustments or heavy use. Address any leaks promptly.
- Cleanliness: Keep the fitting clean and free from dirt, dust, and debris, which can interfere with proper sealing and coupling engagement.
- Seal Integrity: The internal rubber washer or gasket within the universal coupling should be inspected for hardening, cracking, or wear. Replace if necessary to maintain an airtight seal.
- Storage: When not in use, store fittings in a clean, dry environment to prevent corrosion and damage.
7. Troubleshooting
Most issues with air hose fittings relate to leaks or improper connections.
- Air Leak at NPT Thread:
- Cause: Insufficient thread sealant, damaged threads, or loose connection.
- Solution: Depressurize the system. Disconnect the fitting, clean the threads, reapply thread sealant (e.g., fresh PTFE tape), and re-tighten the connection appropriately. If threads are damaged, replace the fitting or the receiving component.
- Air Leak at Universal Coupling:
- Cause: Worn or damaged internal washer/gasket, improper engagement of lugs, or incompatible coupling.
- Solution: Depressurize the system. Inspect the internal washer/gasket and replace if worn. Ensure the 2-lug coupling is fully engaged and locked. Verify that the connecting hose end is compatible with a 2-lug universal fitting.
- Difficulty Connecting/Disconnecting:
- Cause: Dirt/debris, damaged lugs, or corrosion.
- Solution: Clean the coupling mechanism. Inspect for physical damage to the lugs or receiving grooves. Apply a small amount of silicone lubricant if friction is the issue, ensuring it does not compromise the air seal.
8. Warranty and Support
Specific warranty information for the Dixon Air King AM7 Iron Air Hose Fitting is not provided in the product details. For warranty claims, technical support, or further inquiries, please contact Dixon Valve & Coupling directly through their official website or customer service channels. Always retain your proof of purchase for any warranty-related requests.
