A versatile, inert connection system to join sections of tubing quickly and easily:

• pressure rated up to 50psi (3.3bar)
• for 1.0 - 4.0mm OD tubing
• 4-60°C operating temperature

The Omnifit^® Labware cap connection system is a versatile system for connecting different types of tubing easily and quickly. Semi-rigid polymeric tube such as PTFE, ETFE and FEP and rigid materials such as glass, PEEK™ and stainless steel and tubing sizes between 1.0mm and 4mm are suitable for use with these connectors. There are three connection options available depending on the level of chemical inertness required and the connection type preferred. Each connector or valve from Omnifit^® Labware equipped with the typical blue connector cap is shipped with all parts required, to use any of the connection options described below. This makes this connector one of the most flexible and versatile connectors out there on the market.

Included items are:

• PTFE cone, for 1/16" OD tubing (1 per cap)
• FKM O-rings, suitable for tubing OD's from 1.0 to 4.0mm OD (3 per cap)
• Female 1/4"-28 Flat bottom port

One connector - three ways to connect your tubing:

PTFE Cone Option Tubing with an OD of 1/16” is pushed through the supplied cone. The tubing is secured by tightening the end cap and securing the cone in its seat. To assemble, cut the end of the tube square and push it through the ‘Omnifit cap’ and then through the cone until a small amount is protruding, as shown. Screw the cap back onto the connector until finger tight. The assembly is now ready for use. All items equipped with an Omnifit cap type connector ship with a PTFE cone suitable for 1/16" OD tubing. Cones for other tubing types are available separately.    

FKM O-ring Option Use where chemical resistance is less important and also if the exact OD of the tube is not known. All Omnifit® Labware cap-type connectors are supplied with two large and one small O-ring. Used together or separately, these O-rings enable the connection of 1 - 4mm OD tubing of indeterminate size. The ‘O’-rings compress into the cone angle in the body so when the cap is tightened, a seal is created and the tube is retained. To assemble, cut tube end square and push it through the cap and then through the ‘O’-rings, largest first, leaving 1 to 2mm of tube protruding from the small ‘O’-ring as shown. For larger tube sizes (2.5 to 4mm OD), omit the small ‘O’-ring. Screw the cap back onto the connector until finger tight. The assembly is now ready for use.    

Fitting Option Omnifit^® Labware caps have an internal thread that accepts 1/4'’-28 UNF fitting. The PTFE cone supplied with the connector provides the flat bottom for the 1/4'’-28 UNF fitting to give a leak-free connection. To assemble, fit the cone supplied into the cap and screw down onto the mating PTFE part to finger tightness. The cap has now been converted to a 1/4’’-28 UNF flat bottomed port. This port will now take any standard 1/4’’-28 UNF male fitting. This connection allows the use of fittings and tubing already available in the laboratory. 

Find the parts in our online shop here...