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2. Four-way valve - Wikipedia

   en.wikipedia.org/wiki/Four-way_valve

   The four-way valve or four-way cock is a fluid control valve whose body has four ports equally spaced round the valve chamber and the plug has two passages to connect adjacent ports. The plug may be cylindrical or tapered, or a ball.

3. Air-operated valve - Wikipedia

   en.wikipedia.org/wiki/Air-operated_valve

   Three-way valves may be used in pairs to operate a double-acting cylinder, thus replacing a four-way valve. A primary function of the 3-way valve is to save/store air that's compressed in high cyclic applications. 4-way valves are used for systems that require higher air pressure. [3] Four-way valves are the most commonly used components for ...

4. Air brake (road vehicle) - Wikipedia

   en.wikipedia.org/wiki/Air_brake_(road_vehicle)

   Highly simplified air-brake diagram (does not show all air reservoirs and all applicable air valves) 1 Air compressor 7 Park brake hand control valve 2 Pressure regulator 8 Park brake safety release valve 3 Air dryer 9 Brake foot valve 4 Regeneration reservoir 10 Front air-brake chambers 5 Four-way protection valve 11

5. Piping and instrumentation diagram - Wikipedia

   en.wikipedia.org/wiki/Piping_and_instrumentation...

   Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.

6. Railway air brake - Wikipedia

   en.wikipedia.org/wiki/Railway_air_brake

   Piping diagram from 1909 of a Westinghouse 6-ET Air Brake system on a locomotive Control handle and valve for a Westinghouse air brake. A railway air brake is a railway brake power braking system with compressed air as the operating medium. [1]

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

8. Shuttle valve - Wikipedia

   en.wikipedia.org/wiki/Shuttle_valve

   Air pilot control: converting from air to oil results in locking of the cylinder. Shifting the four-way valve to either extreme position applies the air pilot through the shuttle valve, holding the two air-operated valves open and applying oil under air pressure to the corresponding side of the cylinder. Positioning a manual valve to neutral ...

9. AOL Mail for Verizon Customers - AOL Help

   help.aol.com/products/aol-mail-verizon

   AOL Mail welcomes Verizon customers to our safe and delightful email experience!