enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   Diagram symbols for pressure reduction and back pressure regulators. The conceptual difference is mainly in which side the feedback is taken from. A pressure regulator is a valve that controls the pressure of a fluid to a desired value, using negative feedback from the controlled pressure. Regulators are used for gases and liquids, and can be ...

3. Flow control valve - Wikipedia

   en.wikipedia.org/wiki/Flow_control_valve

   These types of valves are also known as automatic control valves. The hydraulic actuators respond to changes of pressure or flow and will open/close the valve. Automatic control valves do not require an external power source, meaning that the fluid pressure is enough to open and close them.

4. Control valve - Wikipedia

   en.wikipedia.org/wiki/Control_valve

   The increased output pressure to the actuator causes the valve stem to move. Stem movement is fed back to the beam by means of a cam. As the cam rotates, the beam pivots about the feedback axis to move the flapper slightly away from the nozzle. The nozzle pressure decreases and reduces the output pressure to the actuator.

5. Pilot-operated relief valve - Wikipedia

   en.wikipedia.org/wiki/Pilot-operated_relief_valve

   At set pressure the valve snaps to full lift. This can be quite violent on large pipes with significant pressure. The pressure has to drop below the set pressure in order for the piston to reseat (see blowdown in relief valve article). Modulating The pilot is designed to open gradually, so that less of the system fluid is lost during each ...

6. Relief valve - Wikipedia

   en.wikipedia.org/wiki/Relief_valve

   A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

7. Mass flow controller - Wikipedia

   en.wikipedia.org/wiki/Mass_flow_controller

   High pressure may cause erratic flow rates. There are many different technologies which can help to measure the flow of the fluids and eventually help in controlling flow. Those technologies define the types of Mass Flow Controllers, and they include differential pressure (ΔP), differential temperature (ΔT), Coriolis , Ultrasonic ...