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Acrux7 1/4" 6mm PVDF Ozone resistance one-way check valve/ plastic water stops check valve/ plastic micro diaphragm check valve Specifications: Total length: 38mm/1.49 inch Diameter: 6.4mm(1/4inch) Shell Material: PVDF Diaphragm Material: VITON Colour: White Opening pressure: ≤0.5 Kpa Maximum back pressure: 200Kpa Feature: ※Medical grade material, safe and nontoxic; ※Strong resistance to acid, alkali, salt corrosion ability; ※Silicone rubber: It has characteristics that other similar materials are difficult to replace: adsorption performance, good thermal stability, chemical stability, high mechanical strength, etc. ※ For the hydraulic system to prevent reverse flow of material, or compressed air for pneumatic system to prevent reverse flow. ※ Can be used for horizontal pipe or vertical pipe. ※ Flow smoothly, small fluid resistance, good sealing performance, short spool stroke, small off valve impact force, attractive appearance and high reliability. ※ Normal performance under -30 ℃ to 150 ℃, excellent chemical and hydrolysis resistance, outstanding ozone, UV and weather resistance.