... Applicable medium:hydrofluoric acid, phosphoric acid, alkali chlorine,with the corrosive medium.Design Standard:API 609/ISO 5752 ... PN6/PN10/PN16/; BS4504 PN10/PN16Features:1. The body is designed, and half axle shaft without pin connections ... torque, reduced, more reliable seal. 3 all contact with the media part adopts the F4 materials, and ... drive mode. : Full PTFE Coated Butterfly Valve-Cast Iron body