Design and manufacturing in compliance with Chinese national standards

Basic structural form (the butterfly plate shaft coincides with the center of the valve body/valve seat)

A. D41F4 fully lined valve body fully lined/butterfly plate fully lined/lining layer butterfly plate and butterfly plate shaft double D matching

b. D41F46 fully lined type

c. D41F4 (46)/P semi lined valve body fully lined/butterfly plate made of stainless steel/double D fit between butterfly plate and butterfly plate shaft