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2. Swagelok - Wikipedia

   en.wikipedia.org/wiki/Swagelok

   Official Website of Swagelok; Jump up to: a b c "Company Profile" U.S. Patent 3,075,793 "Swagelok Timeline". Swagelok. "Swagelok Company Acquires Innovative Pressure Technologies (IPT) Broadens Valve Line". ThomasNet.com News. "Swagelok partners with U.S. Department of Defense on new workforce program for veterans" - cleveland.com

3. Check valve - Wikipedia

   en.wikipedia.org/wiki/Check_valve

   A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

4. Double check valve - Wikipedia

   en.wikipedia.org/wiki/Double_check_valve

   A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

5. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   A check valve is a basic form of backflow prevention, but often more complex devices are required because check valves are not considered to be reliable, when compared to more sophisticated devices with redundancies and reduced-pressure zones. [further explanation needed]

6. Neuer gets sent off for 1st time and Bayern Munich exits ...

   www.aol.com/neuer-gets-sent-off-1st-220513912.html

   Manuel Neuer was sent off for the first time and Bayern Munich crashed out of the German Cup in the third round with a 1-0 loss at home to defending champion Bayer Leverkusen on Tuesday. The 38 ...

7. 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 ...