Smc Pneumatics KQ2R09-11A Plug-in Reducer Fitting 5/16 in

Product Description

The SMC PNEUMATICS KQ2R09-11A is a push-to-connect plug-in reducer tube fitting designed for pneumatic plumbing systems where a quick, tool-free tube connection is required between two different tube sizes. Constructed from brass with polybutylene components, this fitting handles a maximum working pressure of 145 psi and operates across a temperature range of 23 degrees F to 140 degrees F. The stem outside diameter is 3/8 inch, accepting a 5/16 inch OD tube on the push-to-connect end. It is installed by pneumatic technicians, pipefitters, and mechanical contractors building or servicing compressed air distribution lines and fluid conveyance systems.

This fitting is suited for use in residential, commercial, and light industrial pneumatic systems where tubing diameter transitions are required. The plug-in reducer style allows a technician to quickly reduce from one tube size to another inline without additional adapters or tools. It is commonly found in compressed air circuits, automation equipment plumbing, and general pneumatic distribution manifolds. The compact overall length of approximately 1.43 inches (36.20 mm) makes it practical in tight enclosures and panel installations.

Key Features

• Push-to-connect design allows fast, tool-free tube insertion and secure retention
• Plug-in reducer configuration transitions between two different OD tube sizes in a single fitting
• Brass and polybutylene construction provides corrosion resistance suitable for air and compatible fluid service
• Rated to 145 psi maximum working pressure
• Operating temperature range from 23 degrees F to 140 degrees F
• RoHS compliant construction

Compatibility

Designed as an OEM-style push-to-connect plug-in reducer fitting for pneumatic tubing systems using 5/16 inch OD tube with a 3/8 inch stem connection. Verify tube OD and stem size against existing system requirements before installation.

Installation Notes

Installation should be performed by a qualified pneumatic technician or pipefitter. Depressurize and lock out the pneumatic system fully before removing or installing any fitting. Confirm tube cut is clean and square, and that the tube OD is within the specified tolerance before inserting into the push-to-connect collet. Do not exceed the rated working pressure of 145 psi or the maximum temperature of 140 degrees F in service.