Mininert™ Valves from VICI Precision Sampling

Mininert valves
  • Leak-tight closure with syringe access
  • Models for virtually any laboratory glassware
  • Replaceable septum
  • Simple installation

Mininert push-button valves are highly dependable, leak-tight closures for screw-cap vials and other laboratory containers. When used with a glass vial, only PTFE and glass are in contact with the contents. Their unique features make Mininert valves the ideal closure for calibration standards, air- or moisture-sensitive fluids, derivatizing reagents, or volatile chemicals.

Operation is extremely simple - push the green button to open the valve, insert the needle through the septum and take a sample, withdraw the needle, and push the red button to close the valve.

Screw-cap valves for vials

Screw-cap Mininert valves for vials are available in a variety of sizes. The crimp-top valve for 13 mm ID glassware slides into the neck of the vial and features a threaded flange which is turned to provide a leak-tight fit.

Mininert valves for vials

Valves with standard tapers

The laboratory taper model brings Mininert convenience and ease to a variety of applications using standard laboratory glassware, such as reaction chambers, test tubes, and other glass systems.

Mininert valves with standard tapers

Valves with threaded fittings

Our Mininert threaded designs offer positive on/off fluid control as an in-line valve or syringe access as a termination valve at a sample point.

Mininert valves with threaded fittings

Syringe valves

Convenient add-on syringe valves allow our C and D Series syringes to store samples at up to 250 psi. Models are also available to fit luer-tip syringes from any manufacturer.

Mininert valves for syringes

Replacement septa and replacement tool

These silicone septa fit all Mininert valves. The installation tool is a handy device for quickly removing and a replacing needle seal septum.

replacement septa


Contact us for ordering, product support, or more information about any of these products. North American customers may call toll-free (800) 828-1653.


Mininert valves can be used at temperature up to 105°F and as low as 0°F. However, after use at high temperatures, the valve may leak slightly when cooled to room temperature.


PTFE is highly inert and may be used with most common materials. It is particularly useful for working with most acids and organic solvents. However, problems may be encountered when used with organometallics and some strong bases. We recommend actual exposure tests before use with any material.


The sealing ability of Mininert valves is more than adequate for con-taining most volatile liquids and gases at low pressures. Mininert valves have been used as high as 120 psi without leakage, but this is not a recommendation for pressurizing glass containers to these levels. Such pressurization of glass containers can be extremely dangerous.