Cole-Parmer® Enlarging Check Valves, Polypropylene

Safeguard your fluid system from backflows while transitioning diameters

Place these check valves in your line to prevent backflows to protect your fluid system. Enlarging check valves provide a smooth transition from a smaller tubing size to a larger tubing size. Polypropylene body and silicone diaphragm construction offers high purity and exceptional chemical resistance.

The polypropylene body meets USP Plastic Class VI and FDA FDA 21 CFR 177.1520(c) 1.1a requirements, making these check valves ideal for pharmaceutical, food, and beverage applications. The silicone diaphragm opens at 0.5 psi and closes at 1.9 psi ensuring unidirectional flow. A free-floating, disk-based silicone diaphragm allows installation in any position. Single-barb design accepts flexible tubing.