Omnifit Bottle Caps

Safe, simple and economic liquid containment

Positive containment of laboratory chemicals and vapors
Chemically inert wetted parts
Robust and easy to use
Anti-twist design
GL45, GL32 and 38-430 sizes
2, 3 and 4 port caps

Open solvent bottles can allow harmful solvent vapor to escape and chemicals to be spilled. Omnifit bottle caps and accessories help prevent these problems and give you the security of a safe and dependable solvent delivery system.

‘T’ Series
Luer ported / straight through tubing

Simple and versatile
No need for fitting nuts and ferrules
Each port accommodates a male luer or 1/8” OD hard wall tube
Optional integrated check valve and filter

‘Q’ Series
1/4”-28 UNF threaded ports

Robust Stainless Steel threaded ports for standard 1/4”-28 UNF threaded fitting nuts and adaptors
Optional valves for easy on/off control of individual fluid lines

‘C’ Series
‘Omnifit Cap’ connections

Independent control of each fluid line with easy operation on/off valves
Versatile tube connection system for hard wall (semi-rigid) tubing up to 4mm OD

Design Features

Anti-twist cap
All of the Omnifit bottle caps now have this feature allowing the body to spin freely within the cap. This means no more twisted tubes when the cap is fitted or removed and no need to disconnect fluid lines before unscrewing the cap.

Solid PTFE body
The inner body of each Omnifit bottle cap is manufactured from PTFE providing the highest chemical inertness. PTFE also creates a reliable seal to the glass bottle with no need for extra seals or ‘O’-rings.

Selecting a bottle cap
Several factors should be considered when selecting a suitable bottle cap for your application. Please use this guide to help select the best Omnifit bottle cap for your application.

Which series cap do I need?

Removing a liquid from a bottle requires a small amount of pressure or vacuum to be applied to one of the ports of the bottle cap.

If you are removing liquid by applying pressure to push liquid out of the bottle, we recommend a ’C’ or ’Q’ series cap. These caps both have connections suitable for pressure applications. Choose a cap that has sufficient ports for both your fluid lines and a separate air inlet.
If you are removing liquid using a peristaltic or similar pump to pull liquid from the bottle, you must leave one port open to atmosphere to equilibrate the pressure. We recommend a ’T’ series cap with integrated check valve and filter. This will only allow air in when vacuum is applied, does not require a separate port to be given up for venting, and prevents particulate contamination entering the bottle.

For pressure and vacuum applications we only recommend using Omnifit pressure rated reservoirs found in this brochure.

What type of tubing connections should I use?

The simplest connection method is to push tubing straight through the cap. The ’T’ series cap has 1/8" hard wall tubing pushed into and through the port. 1/16" tube can be accommodated using an adaptor (part # 009LA). We recommend using Omnifit PTFE tubing with the T-series cap to guarantee a seal.
If you need to connect a male Luer, such as a syringe to the cap, the T-series has female Luer ports to accommodate most standard male Luer fittings. Softwall (peristaltic pump) tubing can be connected using a Luer to barb adaptor (part # 009BA-32).

If you have threaded fittings on your tubing lines, both the ’Q’ and ’C’ series caps allow ¼"-28 fitting nuts to be screwed into each port for easy and secure line connection.

If you have 1/8" hard wall tubing, the ’C’ series cap is provided with a PTFE cone that allows you to connect your tubing without using a separate fitting. For other size tubing, PTFE cones of various sizes between 0.5 and 4mm OD and Viton® ‘O’-rings are available separately.

Omnifit ’Q’ and ’C’ series caps are supplied with tubing already fitted internally. GL45 caps are supplied with tubes suitable to reach the bottom of a 2-liter bottle; 38-430 caps are supplied with tube for 5 litre bottles; GL32 caps supplied with tube for 50ml bottles. These tubes can be easily removed if not required in all positions. ’T’ series caps are not supplied with tube.

Should I choose a cap with or without valves?

If you need to stop and start the flow of fluids in individual lines, Omnifit ’Q’ and ’C’ series caps are available with valves on each fluid line to enable independent on/off flow control. If fluid connections need to be changed or removed from the bottle to move it elsewhere in the laboratory, the valves can be closed to safely contain liquids and vapors.

Download the Omnifit bottle caps, reservoirs and accessories catalogue