Flapper valves with spring tabs

摘要

A flapper valve assembly (20) has a valve plate (46) for attachment to a fluid device, such as a heat exchanger. The valve plate (46) has a valve orifice (56) for permitting intermittent flow to or from a flow chamber in the fluid device. A resilient flapper (48) covers the fluid port (52) and has at least one transverse tab (62) with resilient, laterally disposed tangs (70), so that the tabs (62) snap into slots (58) in the valve plate (46) to prevent rotation of the flapper (48).