UNEQUAL UNION (CPG)

A Pneumatic Unequal Union (CPG, PG series) is a common type of push-to-connect fitting used in pneumatic systems.Its primary function is to join two pieces of pneumatic tubing of different external diameters in a straight line (a "union" joint).Key Features & FunctionUnequal Connection: The fitting has two ports, each designed to accept a different size of tubing (e.g., an $8\text{mm}$ tube on one side and a $6\text{mm}$ tube on the other). This allows for pipe size reduction or expansion within the pneumatic circuit.Straight Body: As a "union," it provides a straight connection along the same axis, unlike elbows or tees.Push-to-Connect Mechanism: Like most pneumatic fittings, it uses a quick-connect or "one-touch" design. The tubing is simply pushed into the port to create a secure and leak-proof seal, and an elliptical release ring allows for easy, tool-free disconnection.Applications: It is essential in industrial automation and machinery where different-sized air lines need to be integrated to match the pressure, flow, or size requirements of various pneumatic components (e.g., connecting a main supply line to a smaller line feeding a specific tool or cylinder).