Smc Pneumatics KQ2L23-99A Push-to-connect Plug Fitting

Product Description

The SMC PNEUMATICS KQ2L23-99A is a push-to-connect plug fitting designed to terminate or cap off pneumatic tubing lines quickly and without tools. Constructed from brass with a polybutylene tube interface, this plug accepts tubing with an outside diameter of 3.20 mm and holds a maximum working pressure of 145 psi. It is rated for temperatures from 23 degrees F to 140 degrees F, making it suitable for a wide range of indoor pneumatic control and fluid handling applications. Technicians in HVAC, industrial automation, and general pneumatics install this type of fitting where a tube end must be sealed off cleanly during system modification, testing, or maintenance.

This plug fitting is used in pneumatic tubing systems where a port or line end needs to be capped without threading or soldering. Typical applications include low-pressure compressed air circuits, pneumatic control panels, and instrumentation lines operating within the rated pressure and temperature envelope. Its push-to-connect design allows for fast installation and removal, which suits service environments where tubing configurations are frequently changed or reconfigured.

Key Features

• Push-to-connect design allows tool-free tube insertion and secure sealing
• Brass body construction provides durability and resistance to corrosion in pneumatic service
• Polybutylene tube compatibility supports flexible tubing commonly used in pneumatic circuits
• Rated to 145 psi maximum working pressure for low-to-medium pressure pneumatic systems
• Operating temperature range of 23 degrees F to 140 degrees F suits most indoor service environments
• 3.20 mm tube outside diameter and 3.20 mm stem outside diameter for precise tube retention

Compatibility

Designed as an OEM-style push-to-connect plug fitting for pneumatic tubing systems using 3.20 mm outside diameter flexible tubing operating within the rated pressure and temperature limits.

Installation Notes

Installation is performed by qualified technicians familiar with pneumatic tubing systems. Before servicing any pneumatic line, depressurize the circuit fully and verify zero pressure before inserting or removing fittings. Push tubing straight into the fitting until it seats against the internal collet, then perform a pull-back check to confirm retention. Follow applicable facility safety and pneumatic system codes when integrating into pressurized circuits.