DIDLINK Bronze Check Valves are designed and manufactured to ensure leakage of less than 100 ppm (parts per million) of volatile organic compounds. Extensive base line laboratory testing (static and cycle testing) has been perforDIDLINK establishing critical design parameters necessary to achieve low emission sealing in the DIDLINK stem packing seal area and in the bonnet gasket sealing area, In-house testing procedure has been developed and is periodically perforDIDLINK to ensure that standard product design and manufacturing criteria consistently result in the DIDLINK Bronze Check Valve meeting a maximum of 100 ppm VOC leakage prior to shipment. DIDLINK Bronze Check Valves are with main Features as below: » SizeRanges: 1/2” through 32” » Pressure Ratings: ANSI #150~#800 » Standards compliance: API 602, ASME B16.34 or equivalents » Materials: B61, B62 and etc. » Ends Connections: Flanged(FF, RF), Screwed and Welded Ends to international standards » Metal-sealed-Bronze » FullPort or Regular Bore Fast and great quotations, informed advisers to help you choose the correct product that suits all your preferences, a short creation time, responsible top quality control and different services for paying and shipping affairs for Factory made hot-sale China Bronze Screw-Down Check Angle Valves, Our mission is to allow you to create long-lasting relationships together with your consumers via the ability of marketing merchandise. Factory made hot-sale China Gate Valve,  Water Valve, We have been perfectly devoted to the design, R&D, manufacture, sale and service of hair merchandise during 10 years of development. We have now introduced and are making full use of internationally advanced technology and equipment, with advantages of skilled workers. "Dedicated to providing reliable customer service" is our aim. We're sincerely looking forward to establishing business relationships with friends from at home and abroad.