Sample Prep/Storage: Safe, Cost-effective Liquid Handling for Laboratories and Instrument Manufacturers

Responding to a need by laboratories for improved safety and security when performing liquid transfer operations, Biochem Valve and Omnifit now offer the widest range of bottle cap configurations for the safe containment of volatile vapours and transfer of chemicals.

The entire bottle cap range is designed to fit securely to GL32, 38-430 and GL45 glass solvent reservoir bottles. Solid PTFE bodies provide the highest chemical inertness and seal reliability without requiring any extra seals or 'O'-rings. A simple screw-on connection to the bottle is all that is required to install the cap. In addition, an anti-twist feature permits the connection platform to spin freely within the cap so that tubes will not twist or become tangled during use or when the cap is unscrewed.

Since liquid is removed by applying either pressure or vacuum to one of the ports, the selection of cap and configuration of ports is made to coincide with the desired extraction method.

The Omnifit 'T' series cap offers the simplest combined port configuration, requiring no fittings and allowing either a male luer or 1/8" hard wall tube to be pushed into a port. An integral one-way check valve and inlet filter prevents solvent vapours from escaping into the work environment and eliminates the possibility of ambient debris contaminating the liquid. A choice of 2, 3 and 4 ports is offered with or without a check valve and filter system.

For greater versatility, the 'C' series connector cap, available with or without valves, accommodates 1/8" OD* hard wall tubing connected directly into the cap using supplied PTFE cones, or hard wall tubing between 0.5mm and 4 mm OD using Viton® 'O'-rings or PTFE cones.

The 'Q' series, also available with or without valves, features stainless steel thread inserts for robust repeat connect/disconnect assemblies. 'Q' series caps connect tubing via ¼"-28 ports and fitting nuts.