Abstract: A valve sealing flange for sealing fluid ports in a valve is provided, comprising a flexible planar portion having first and second opposed surfaces, spaced-apart, elongated, tapered protrusions extending upwardly from the first surface of said sealing flange, the protrusions being configured and positioned on the surface of the planar portion to mate with fluid ports located within a side surface of a valve when the valve sealing flange is placed thereon to effect sealing of the ports, and spaced-apart protrusions extending from the second surface of thesealing flange, the protrusions being of such configuration and spacing to support the sealing flange in a substantially level position when attached to the valve.