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Pressure regulator for domestic water supply. Outlet pressure is set with the blue handwheel and shown on the vertical scale. A water pressure regulating valve limits inflow by dynamically changing the valve opening so that when less pressure is on the outside, the valve opens up fully, and too much pressure on the outside causes the valve to shut.
A Dräger two-stage twin-hose regulator Beuchat "Souplair" single stage twin hose regulator Twin 7l cylinders with Draeger harness, valves, manifold and regulator from c. 1965 Duckbill exhaust valve for Draeger twin hose regulator. The "twin", "double" or "two" hose configuration of scuba demand valve was the first in general use. [16]
A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving.The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure and deliver it to the diver, but there are also other types of gas pressure regulator used for diving applications.
The twin-hose Aqua-Lung demand regulator is the foundation of all modern scuba regulators. A diaphragm is used to control a valve to deliver the breathing gas to the diver on demand, at ambient water pressure.
The cold water testing specified in EN250:2000 has scuba regulators tested in water 4 °C (39 °F) or colder. Regulators are tested in both facing forward and facing down positions. The test starts at (50 msw) 165 fsw and the regulator is breathed at 62.5 lpm for five minutes. To pass, the regulator must remain within the work of breathing ...
The "single-hose" system has significant advantages over the original system for most applications. [47] In the "single-hose" two-stage design, the first stage regulator reduces the cylinder pressure of up to about 300 bars (4,400 psi) to an intermediate pressure (IP) of about 8 to 10 bars (120 to 150 psi) above ambient pressure.