Abstract: A reinforced industrial butterfly valve incorporating a tubular housing, having a disc valve stem mounted for pivotal movement within the flow passage provided through the housing, a resilient seal provided around the interior periphery of the flow passage, to provide a positive seal during pressure or vacuum service of this valve, during its application, the valve housing having apertures provided diametrically aligned therein, one of the apertures being counterbored for accommodating a bushing for mounting of the extending proximate end of the valve stem, while the opposite aligned aperture extending entirely through the tubular housing, having a counterbore arranged partially therethrough, and into which another bushing and a packing mount for accommodating the securement of the opposite extending disc valve stem so as to furnish a positive disc control during continuous industrial applications of the valve of this invention.