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3/8" Inline ABS one way water non return check valve for drinking fountains, miniature check valve, medical stop valve. Specifications: Shell material: ABS resin Diaphragm material: silicon rubber Diameter: 10mm/0.39 inch Total length: 43mm/1.69 inch Opening pressure: ≤0.5 Kpa Maximum back pressure: ≥0.3 Mpa ►Medical grade material, safe and nontoxic. ►Under 25 Degrees Celsius ~ 60 Degrees Celsius environment is normal performance, and has good form ability. ►Used in fluid system to prevent reverse flow flow, or used in pneumatic system to prevent reverse flow of compressed air. Material characteristics: ---Valve material --- ABS: It has very good cold resistance and can be used in cold environments for a long time. Chemically resistant to glycerin, inorganic salts, bases, polyamino acids, most alcohols and hydrocarbons; resistant to weak acids, but not to strong acids, ketones, aldehydes, esters and chlorinated hydrocarbons. ---Sealing material --- Silicone: High adsorption properties, thermal stability, chemical stability, has high mechanical strength, etc package included: 4 * Valve