Abstract: There is disclosed a tub diaphragm valve for controlling hydraulic flow therethrough. The valve includes a diaphragm composed of innermost and outermost layers formed of elastic resiliently distortable fluid tight material and an intermediate layer of mesh material of relatively limited stretchability being unbonded to the innermost and outermost layers.
Abstract: A tube valve having a tube that closes the valve by being moved to a position juxtaposed to an impervious support structure having a traversing impervious barrier and that opens the valve by being moved away from the support structure wherein the "water hammer" effect is minimized by tube movement resistance generated by the barrier configuration.