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ZFV EN LUG triple offset butterfly valve. The valve shown in photo is DN200, PN25. material stainless steel A351 CF8M. ZFV butterfly valve produced in strict accordance with the requirements of API609, in order to prevent the pressure due to fluid pressure, the temperature caused by the disc deformation, stem dislocation, sealing surface bite, two separate thrust rings are equiped in upper and lower side of disc, to ensure the valve work under any condition.