WENK Pneumatic C-Type Multi-Line Self-Locking Connector(internal thread)
Product Detail
Working Pressure |
0.1-0.9Mpa(1-9kgf/cm²) |
Proof Pressure |
1.35Mpa(13.5kgf/cm²) |
Working Temperature Range |
0℃~60℃ |
Body Material |
Zinc Alloy |
C-Type Multi-Line Self-Locking Connector User Guide

Product Introduction
The WENK Pneumatic C-Type Multi-Line Self-Locking Connector (SMY Series) is an innovative pneumatic connection solution designed for simultaneous connection of multiple air circuits. This series features an integrated design with 2 or 3 outlet configurations and precision-machined female threaded connections (available in G-type or NPT standards), enabling efficient multi-line connections in industrial pneumatic systems.
The female threaded ports feature precision machining to ensure tight sealing with mating male threaded components, effectively preventing leaks. Equipped with a reliable self-locking mechanism, it ensures secure branch line connections and prevents accidental disconnection even under vibration. The zinc alloy construction with corrosion-resistant plating provides durability and long service life in demanding environments.

Installation Steps
-
Preparation
- Ensure the air supply is turned off and the pipeline is depressurized
- Clean the connector and pipe interfaces, ensuring no dust, oil, or debris
- Check that the O-rings are intact and undamaged
- Verify that the thread specification (G-type or NPT) matches the mating component
-
Main Connector Installation
- Select the appropriate 2-port or 3-port connector based on system requirements
- Inspect the female threaded port for damage or contamination
- For G-type threads, PTFE tape or thread sealant can be used to enhance sealing (wrap PTFE tape in the opposite direction of thread rotation, 2-3 wraps only)
- For NPT threads, thread sealant (such as Loctite 577) is recommended; PTFE tape is not recommended
- Align the female threaded end of the connector with the male threads of the air supply pipe, ensuring coaxial alignment
- Hand-tighten the connector until the threads are fully engaged (typically 3-5 full rotations)
- If using tools, apply moderate torque (generally 15-25 N·m) to avoid damaging the threads
- Check for leaks at the threaded connection and tighten slightly if necessary
-
Branch Line Connection
- Verify that the branch line connectors match the main connector specifications
- Insert the branch line into the outlet port of the main connector until a clear "click" is heard
- Gently pull the branch line to confirm a secure connection
-
System Inspection
- Turn on the air supply and check all connections for leaks
- Verify that the pressure in each line is normal
- Test the self-locking function to ensure no accidental disconnection under tension
Preparation
- Ensure the air supply is turned off and the pipeline is depressurized
- Clean the connector and pipe interfaces, ensuring no dust, oil, or debris
- Check that the O-rings are intact and undamaged
- Verify that the thread specification (G-type or NPT) matches the mating component
Main Connector Installation
- Select the appropriate 2-port or 3-port connector based on system requirements
- Inspect the female threaded port for damage or contamination
- For G-type threads, PTFE tape or thread sealant can be used to enhance sealing (wrap PTFE tape in the opposite direction of thread rotation, 2-3 wraps only)
- For NPT threads, thread sealant (such as Loctite 577) is recommended; PTFE tape is not recommended
- Align the female threaded end of the connector with the male threads of the air supply pipe, ensuring coaxial alignment
- Hand-tighten the connector until the threads are fully engaged (typically 3-5 full rotations)
- If using tools, apply moderate torque (generally 15-25 N·m) to avoid damaging the threads
- Check for leaks at the threaded connection and tighten slightly if necessary
Branch Line Connection
- Verify that the branch line connectors match the main connector specifications
- Insert the branch line into the outlet port of the main connector until a clear "click" is heard
- Gently pull the branch line to confirm a secure connection
System Inspection
- Turn on the air supply and check all connections for leaks
- Verify that the pressure in each line is normal
- Test the self-locking function to ensure no accidental disconnection under tension

Usage Instructions
-
Connection Operation
- Ensure all connectors and pipes are clean and undamaged
- Insert the branch line directly into the outlet port of the main connector until a "click" is heard
- Test the connection by gently pulling after assembly
-
Disconnection Operation
- Turn off the air supply and release pressure from the system
- Press the unlock button on the branch line connector
- Maintain the unlocked state while pulling the branch line out smoothly
-
Daily Usage Notes
- Avoid excessive bending or twisting of the connected pipes
- Regularly inspect the connectors and pipes for wear or damage
- Keep the connectors clean to prevent debris from entering the pneumatic system
- Never attempt to disconnect under pressure
Connection Operation
- Ensure all connectors and pipes are clean and undamaged
- Insert the branch line directly into the outlet port of the main connector until a "click" is heard
- Test the connection by gently pulling after assembly
Disconnection Operation
- Turn off the air supply and release pressure from the system
- Press the unlock button on the branch line connector
- Maintain the unlocked state while pulling the branch line out smoothly
Daily Usage Notes
- Avoid excessive bending or twisting of the connected pipes
- Regularly inspect the connectors and pipes for wear or damage
- Keep the connectors clean to prevent debris from entering the pneumatic system
- Never attempt to disconnect under pressure

Troubleshooting
-
Air Leakage
- Check if the O-rings are damaged and replace if necessary
- Verify that connections are fully seated and reconnect if needed
- Inspect the pipes for cracks or damage
-
Difficulty Connecting or Disconnecting
- Check if the locking mechanism is blocked by debris, clean and retry
- Confirm that connector specifications match
- Inspect for any deformation or damage to components
-
Insufficient Pressure
- Check if the system pressure is normal
- Verify all connections are secure and free from leaks
- Inspect the air path for blockages
Air Leakage
- Check if the O-rings are damaged and replace if necessary
- Verify that connections are fully seated and reconnect if needed
- Inspect the pipes for cracks or damage
Difficulty Connecting or Disconnecting
- Check if the locking mechanism is blocked by debris, clean and retry
- Confirm that connector specifications match
- Inspect for any deformation or damage to components
Insufficient Pressure
- Check if the system pressure is normal
- Verify all connections are secure and free from leaks
- Inspect the air path for blockages

Maintenance
-
Regular Inspection
- Check O-ring condition weekly
- Inspect the locking mechanism monthly for flexibility
- Check the tightness of threaded connections monthly and retighten if loose
- Perform a comprehensive inspection and cleaning quarterly
-
Cleaning Method
- Wipe the connector surfaces with a clean cloth
- For threaded ports, use a soft brush to remove residual sealant or debris
- For stubborn stains, use a neutral cleaning agent
- Ensure the connector is completely dry before use after cleaning
-
Storage Recommendations
- Store connectors in a dry, clean environment when not in use for an extended period
- Use dust caps to protect both threaded ports and quick-connect interfaces
- Avoid direct sunlight and high-temperature environments
- Apply a small amount of anti-rust oil to threaded ports to prevent corrosion
Regular Inspection
- Check O-ring condition weekly
- Inspect the locking mechanism monthly for flexibility
- Check the tightness of threaded connections monthly and retighten if loose
- Perform a comprehensive inspection and cleaning quarterly
Cleaning Method
- Wipe the connector surfaces with a clean cloth
- For threaded ports, use a soft brush to remove residual sealant or debris
- For stubborn stains, use a neutral cleaning agent
- Ensure the connector is completely dry before use after cleaning
Storage Recommendations
- Store connectors in a dry, clean environment when not in use for an extended period
- Use dust caps to protect both threaded ports and quick-connect interfaces
- Avoid direct sunlight and high-temperature environments
- Apply a small amount of anti-rust oil to threaded ports to prevent corrosion

Safety Precautions
- Ensure connector specifications match system requirements before use
- Do not exceed the maximum working pressure of the connector
- Ensure the system is depressurized before connecting or disconnecting
- Regularly inspect connector condition and replace immediately if damaged
- Avoid using the connector with non-specified media
- Avoid over-tightening threaded connections to prevent damage to threads or sealing surfaces
- When disassembling threaded connections, use appropriate lubricant if stuck; do not force disassembly












