DIVING REGULATOR DEMAND VALVE

摘要

A regulator for use in underwater breathing comprises a primary housing with a breathing chamber and a demand valve (20) enabling flow of air, upon demand by a user, from an inlet orifice (22) to an output (16) in the valve (20) and then to an outlet (32) in the primary housing and then via a mouthpiece (29) to the lungs of a user. The valve (20) comprises a slidably mounted poppet (21) one end (23) of which is urged against orifice (22) by a biasing spring (25). Movable diaphragm (28) in response to demand for air draws end (23) of the poppet away from the orifice (22) against the force of the biasing spring (25) allowing the flow of air. A concentric sleeve about the valve body may be rotated to adjust the flow of air through the regulator.