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By certification 
Product Description
KOSEN Cast Floating Ball Valves are designed manufactured to provide maximum service life and dependability. All ball valves are full ported and meet the design requirements of American Petroleum Institute Standard API 608&API 6D British standard BS5351 and generally conform to American Society of Mechanical engineers standard ASME B16.34 valves are available in a complete range of bady/bonnet materials and trims.
Ranges of Materials
Standard body/bonnet materials include nine grades of carbon,low alloy and srainless steel,for special applications they can be supplied in other grades of alloy and stainless steel.There`s a full range of trim materials to match any service optional packing and gasket materials are available for a full range of service conditions.
Standards compliance
Design and Manufacture: API 608,API 6D,BS5351
Face to face(end to end): ANSI B16.10,API 6D
Flanged connection:2"~24" to ANSI B16.5
Fire-safe: API 607,API 6FA
Butt welded end: ANSI B16.25
Test and inspection: API 598,API 6D
http://www.kosen-valves.com/
