Economic and practical American Standard ball can be directly welded to the pipeline there is a US standard ball-type, two-piece, three-piece, while large valves are usually three-piece ball valve, this valve is actually quite economical to use, as opposed to American Standard flanged ball valve is a standard design, such as: taking into account the circumstances bearing equipment and bonnet of the same casting or forging bolted to the end face of the two-body intermediates. This design is also suitable for small to DN50 valves. Even bigger size low pressure, can also produce high axial force on the ball, so you need to reduce the seat trunnion bearing load pressure to an acceptable range. Flanged valves are usually, this can be easily removed from the pipeline. Some manufacturers will allow American Standard ball valve welded directly at the upstream end of the pipeline to increase the integrity. Valve is suitable for all popular materials, pressure rating from ANSll50I to 2500LB. Brand Frank Valve Model Q41F-150LB CF8 Stainless steel flange connection form structures form a floating ball valve nominal diameter DN15-DN600 (mm) Standard American Standard American Standard ball valves are different due to the implementation of standards and national standards in the design of structural valve, So there will be differences in price between the two, so when buying the phone, please contact us directly. Wenzhou Frank Valve Co., Ltd. Address: Wenzhou Yongqiang Hi-Tech Industrial Development Zone of the Hill Industrial Park Road 59 macro Tel: 0577-86939928 Fax: 0577-86930999 Contact: Manager Wu phone: 18067796085 QQ: 1450086854 E-mail: 1450086854@qq.com American Standard Ball: http: //www.lankevalve.com