Valco Instruments Co Inc offers micro valves for liquid or gas handling applications. Valves have a bore size of 0.060" and can handle up to 200 psi. Valves come in a compact 1" design and the internal valve parts are made of PEEK and PTFE. "T", 90°, and 180° flowpath configurations are available.

Smart Products, Inc. offers Series 500 miniature check valves. Valves feature a unique tamper-resistant, one piece design and a compact size. Valves are easily mounted in-line for liquid or air applications. Spring pressure ranges from 0.07 to 20 psi. Valves can be used for liquid or air related applications, and are made of polypropylene, nylon, acrylic, acetal, PVDF, polycarbonate, Ultem®, and ABS materials.

Dultmeier offers polypropylene micro ball valves. Valves are made with precision molded polypropylene reinforced with fiberglass materials. Valves have a 90 degree rotating handle and allow 150 PSI.