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Pneumatic three-piece ball valve body is of three-stage structure, which is preloaded by four high-pressure bolts. Pn1.6mpa-pn6.4mpa Class100LB-class400LB pressure is cast valve body, and PN6.4mpa-PN40.0mpa Class400LB-class2500lb pressure is made of forged valve body.Pneumatic three-chip ball valve processing technology, production standards have GB, ANSI, API, etc., reasonable structure, beautiful shape.The valve seat adopts elastic sealing structure, which is reliable and easy to open and close.