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Cheminert Low Pressure Fittings

Cheminert low pressure fittings are ideally suited for flow injection analysis, low pressure liquid chromatography, and stream sampling devices. They may be safely used at pressures up to 500 psi and temperatures to 50°C.

Two designs of low pressure tube end fittings are available: flangeless tube end fittings utilize our new collapsible ferrule which grips the tubing as the fitting is tightened, while standard tube end fittings are retained on polymeric tubing by a flange formed with a Cheminert flanging tool.

The wide selection of adapters allows connection to male and female luers; 1/16", 1/8", and 1/4" metal and plastic tubing; 1/8" and 1/4" pipe thread; and glass tubing.

Flangeless fittings

Flangeless tube end fittings eliminate the flanging tool required with standard tube end fittings. The nut turns on the tubing as freely as with our flanged fitting, eliminating the possibility of cracking or unscrewing that can occur when plastic tubing is subjected to twisting as fittings are connected.

Cheminert flangeless fittings now include our new collapsible ferrule design (patent pending). This innovative design utilizes a one-piece ferrule engineered to collapse as it is tightened. The collapse takes place in a very narrow area, and results in a very effective seal with virtually no distortion of the tubing ID and no dead volume. The assembly is rated at 500 psi liquid when tightened by hand. Since only the tubing and the ferrule come into contact with the solution, the result is an inert system.

Flanged fittings

The basic component of the flanged Cheminert system is the polypropylene nut, retained on PTFE or FEP tubing by a flange formed with a Cheminert flanging tool. This is an excellent method for connecting fluorocarbon tubing, as there is no reduction of the inside diameter and no binding or twisting of the tubing when the fitting is tightened. These fittings are widely used in biological applications and flow injection systems, with a variety of adapters and connectors available to allow connection to virtually any system.

Go to Cheminert fittings products list
Read about high pressure Cheminert fittings
Read about Valco fittings