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2. Diaphragm valve - Wikipedia

   en.wikipedia.org/wiki/Diaphragm_valve

   Diaphragm valves can be controlled by various types of actuators e.g. manual, pneumatic, hydraulic, electric etc. The most common diaphragm valves use pneumatic actuators; in this type of valve, air pressure is applied through a pilot valve into the actuator which in turn raises the diaphragm and opens the valve. This type of valve is one of ...

3. Valve actuator - Wikipedia

   en.wikipedia.org/wiki/Valve_actuator

   The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...

4. Solenoid valve - Wikipedia

   en.wikipedia.org/wiki/Solenoid_valve

   Ordinary valves can have many ports and fluid paths. A 2-way valve, for example, has 2 ports; if the valve is open, then the two ports are connected and fluid may flow between the ports; if the valve is closed, then ports are isolated. If the valve is open when the solenoid is not energized, then the valve is termed normally open (N.O.).

5. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   Installing a bypass pipe with a pushbutton to open valve (normally spring closed valve) between the inlet and outlet of the security valve can let the upstream and downstream pressure can be equalized on both sides of the security valve, so it can be reset. Security valves are used at schools, hospitals, prisons, and other hard-to-evacuate ...

6. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Valves stop (or regulate) the flow of liquids or gases. They are categorized by application, such as isolation, throttling, and non-return. Isolation valves temporarily disconnect part of a piping system to allow maintenance or repair, for example. Isolation valves are typically left in either a fully open or closed position.

7. 'It doesn't make sense': Why millions of children have lost ...

   www.aol.com/doesnt-sense-why-millions-children...

   AURORA, Colo. — Isabella Quintana’s first birthday came with an unwelcome gift this summer: She abruptly lost her health insurance weeks later. The little girl, who has a heart murmur and ...