We already gained ISO9001 Quality System Authentication Certificate in 2000, American Petroleum Institute API 6Dã??API Q1ã??CE & AZ products Authentication Certificate, and the special equipment manufacture license. In accordance with standards as GB, ANSI, API, JIS, DIN, BSï¼?NFï¼?ISO. Nominal diameter 3mm-2200mm and 1/2" ~36"; Nominal pressure:1.0MPa-42.0MPa and 150Lb-2500Lb; Working temperature: -196â??~595â??.The valve material can select LCB, WCB, CF8, CF3, CF8M, CF3M, WC6, WC9, ZGCr5Mo, ZG20CrMoV, ZG15CrMolV, 12CrMoV, ZG1Crl 8Ni9Ti, ZG1Crl 8Nil2Mo2Ti etc. The valve can adopt various kinds of drive equipments, such as manual electric, pneumatic, hydraulic drive, gear drive, worm drive etc, and can be applied extensively for the fields, such as petroleum, petrochemical, chemical industry, metallurgy, electricity, urban construction, environmental protection, light industry, liquefied gas, gas warehousing transportation, etc.