Abstract: An exhaust valve for a diving suit includes a valve seating disc having a concave annular valve seat sealing surface adjacent its rim, and a flexible diaphragm sealingly disposed adjacent the sealing surface. An axially resilient sleeve is attached at its ends to the inlet portion of the housing and the seating disc. Axial compression of the sleeve moves the disc and diaphragm away from a normally contacting annular rim in the housing to permit air under pressure to exit the diving suit and flow radially between the sealing rim portion of the diaphragm and the sealing surface of the disc, then to exit the valve.