Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Screw Cap Valve (SCV)

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The Screw Cap Valve (SCV) is our new valve composed of high-grade inert polypropylene and is a screw cap design with replaceable Thermogreen LB-2 septum in the valve cap. The valve is opened and closed by only turning the cap (not the valve body) one-half turn. The septum comes into contact with the sample during sampling. When the valve is closed, our septum makes the seal to maintain the integrity of your sample. This valve is securely fastened in the upper portion of the bag and the stem of the valve is parallel to the bag. This valve is an excellent choice when your application requires replacing septa.