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2. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   Two types are found: The pressure reduction regulator and the back-pressure regulator. A pressure reducing regulator is a control valve that reduces the input pressure of a fluid to a desired value at its output. It is a normally-open valve and is installed upstream of pressure sensitive equipment. [ 1 ]

3. Diving regulator - Wikipedia

   en.wikipedia.org/wiki/Diving_regulator

   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.

4. Mechanism of diving regulators - Wikipedia

   en.wikipedia.org/wiki/Mechanism_of_diving_regulators

   The mechanism of diving regulators is the arrangement of components and function of gas pressure regulators used in the systems which supply breathing gases for underwater diving. Both free-flow and demand regulators use mechanical feedback of the downstream pressure to control the opening of a valve which controls gas flow from the upstream ...

5. Regulator (automatic control) - Wikipedia

   en.wikipedia.org/wiki/Regulator_(automatic_control)

   Regulator (automatic control) In automatic control, a regulator is a device which has the function of maintaining a designated characteristic. It performs the activity of managing or maintaining a range of values in a machine. The measurable property of a device is managed closely by specified conditions or an advance set value; or it can be a ...

6. Self-contained breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/Self-contained_breathing...

   Demand: 2000 psi to the regulator from the main valve, plus a bypass valve in case of failure, with a two-stage regulator reducing pressure to 50-100 psi. Pressure-Demand: Similar to demand, but with a spring in the diaphragm, which holds the admission valve open, for continuous air flow to the facepiece.

7. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow. In water distribution systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze ...