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2. Control valve - Wikipedia

   en.wikipedia.org/wiki/Control_valve

   A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure , temperature , and liquid level.

3. Hans Baumann (inventor) - Wikipedia

   en.wikipedia.org/wiki/Hans_Baumann_(inventor)

   In 1977, he founded H. D. Baumann Assoc., Ltd., manufacturing control valves; the company was subsequently acquired by Fisher Instruments, and is now part of Emerson Process Management. [2] Baumann is a licensed Professional Engineer in four states and a member of Sigma Xi, the Scientific Research Society. [2]

4. Flow control valve - Wikipedia

   en.wikipedia.org/wiki/Flow_control_valve

   Control valves are normally fitted with actuators and positioners. Pneumatically-actuated globe valves and diaphragm valves are widely used for control purposes in many industries, although quarter-turn types such as (modified) ball and butterfly valves are also used. Control valves can also work with hydraulic actuators (also known as ...

5. Georg Fischer (company) - Wikipedia

   en.wikipedia.org/wiki/Georg_Fischer_(company)

   GF Piping Systems supplies is piping systems made of plastics and metal as well as solid and hollow bar stock for machining. The division makes components for the transport of water and gas in industry, utilities, and buildings. Its product line includes fittings, valves, pipes, automation and jointing and covers all water cycle applications.

6. Globe valve - Wikipedia

   en.wikipedia.org/wiki/Globe_valve

   Control Valve Handbook – Fisher Controls International (4th Edition) – a complete 297-page online book. Process Instrumentation (Lecture 8): Control valves Archived 2015-05-29 at the Wayback Machine – an article from a University of South Australia website.

7. Flow coefficient - Wikipedia

   en.wikipedia.org/wiki/Flow_coefficient

   The use of the flow coefficient offers a standard method of comparing valve capacities and sizing valves for specific applications that is widely accepted by industry. The general definition of the flow coefficient can be expanded into equations modeling the flow of liquids, gases and steam using the discharge coefficient.