Glas-Col's new separatory funnel is designed to offer a new level of convenience and safety when used with Glas-Col shakers. This funnel has a screw cap with a PTFE resin lining to reduce the possibility of contamination. The drain spout is a screw-on PTFE resin design which reduces the chance of breakage and allows for easier cleaning. When used with Glas-Col's new pressure relief valve (S2214F-7, -8), it offers the convenience of self-venting for applications where pressure build-up is a concern. Designed to work specifically with Glas-Col separatory funnels, these pressure release valves reduce the hazards of pressure build-up. Models are also available to convert other separatory funnels to automatically vent. They simply slip over the drain of a Glas-Col funnel and tighten down with a twist of the wrist. The valve can be easily removed when it is time to drain the funnel. Each valve is made of PTFE resin and is factory preset to release at 1 psi of pressure. The valve can be adjusted to release at pressures up to 5 psi by turning the pressure release slug on the top of the valve with a screwdriver.