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- Q1816388 subject Q6504813.
- Q1816388 subject Q6505785.
- Q1816388 abstract "Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.Control Valve is also termed as the Final Control Element.The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals. These control signals, traditionally based on 3-15psi (0.2-1.0bar), more common now are 4-20mA signals for industry, 0-10V for HVAC systems, and the introduction of "Smart" systems, HART, Fieldbus Foundation, and Profibus being the more common protocols. Some of the control valve available are Reverse Double-Ported Globe-Style Valve Body, Three-Way Valve with Balanced Valve Plug, Flanged Angle-Style Control Valve Body, Valve Body with Cage-Style Trim, Balanced Valve Plug, and Soft Seat.A control valve consists of three main parts in which each part exist in several types and designs:Valve's actuatorValve's positionerValve's body↑ ↑".
- Q1816388 thumbnail Carbon_steel_globe_valve.jpg?width=300.
- Q1816388 wikiPageExternalLink cvh99.pdf.
- Q1816388 wikiPageExternalLink control-valve-sizing.
- Q1816388 wikiPageExternalLink index.html.
- Q1816388 wikiPageExternalLink enser002.htm.
- Q1816388 wikiPageExternalLink control-hardware-el-pn-actuation.asp.
- Q1816388 wikiPageExternalLink IL8.doc.
- Q1816388 wikiPageWikiLink Q1141640.
- Q1816388 wikiPageWikiLink Q11435.
- Q1816388 wikiPageWikiLink Q11466.
- Q1816388 wikiPageWikiLink Q12725.
- Q1816388 wikiPageWikiLink Q1411580.
- Q1816388 wikiPageWikiLink Q1422221.
- Q1816388 wikiPageWikiLink Q1641943.
- Q1816388 wikiPageWikiLink Q1649571.
- Q1816388 wikiPageWikiLink Q167676.
- Q1816388 wikiPageWikiLink Q1770203.
- Q1816388 wikiPageWikiLink Q177784.
- Q1816388 wikiPageWikiLink Q1798773.
- Q1816388 wikiPageWikiLink Q1965061.
- Q1816388 wikiPageWikiLink Q208443.
- Q1816388 wikiPageWikiLink Q216320.
- Q1816388 wikiPageWikiLink Q2845593.
- Q1816388 wikiPageWikiLink Q332934.
- Q1816388 wikiPageWikiLink Q356235.
- Q1816388 wikiPageWikiLink Q39552.
- Q1816388 wikiPageWikiLink Q4697628.
- Q1816388 wikiPageWikiLink Q4763366.
- Q1816388 wikiPageWikiLink Q4917288.
- Q1816388 wikiPageWikiLink Q5271785.
- Q1816388 wikiPageWikiLink Q533123.
- Q1816388 wikiPageWikiLink Q645044.
- Q1816388 wikiPageWikiLink Q6504813.
- Q1816388 wikiPageWikiLink Q6505785.
- Q1816388 wikiPageWikiLink Q7198517.
- Q1816388 wikiPageWikiLink Q7205972.
- Q1816388 wikiPageWikiLink Q7310899.
- Q1816388 wikiPageWikiLink Q942840.
- Q1816388 wikiPageWikiLink Q959968.
- Q1816388 comment "Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.Control Valve is also termed as the Final Control Element.The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. ".
- Q1816388 label "Control valves".
- Q1816388 depiction Carbon_steel_globe_valve.jpg.