Butterfly valve designed to be used in the pharmaceutical industry where the valve is made in two parts for ease of assembly to its outer sleeve seal

摘要

The unit consists of a sleeve (1) in a circular form made from an elastomer which is placed coaxially in the flow path of a conduit and a metallic butterfly valve (2) made up of two parts, a blanking disc (20) and a fixed shaft (22) mounted to rotate within the sleeve (1) about an axis (21) and a detachable part (23) that screws into a threaded portion of the valve when positioned. The sleeve is coated on its inside with a bed of high density polymer to make the seal inert.