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		<title>Four-port control valve - Revision history</title>
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		<updated>2026-05-26T18:28:22Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Four-port_control_valve&amp;diff=257543&amp;oldid=prev</id>
		<title>Designing Buildings: Created page with &quot;[https://www.bsria.com/uk/product/NrM42B/hydronic_systems_design_set_of_2_guides_hsd2_a15d25e1/ Selection of Control Valves in Variable Flow Systems] (BG 51/2014) written by Chri...&quot;</title>
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				<updated>2023-06-27T08:52:20Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;[https://www.bsria.com/uk/product/NrM42B/hydronic_systems_design_set_of_2_guides_hsd2_a15d25e1/ Selection of Control Valves in Variable Flow Systems] (BG 51/2014) written by Chri...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[https://www.bsria.com/uk/product/NrM42B/hydronic_systems_design_set_of_2_guides_hsd2_a15d25e1/ Selection of Control Valves in Variable Flow Systems] (BG 51/2014) written by Chris Parsloe and published by BSRIA in June 2014, defines a four-port control valve (4PV) An actuated control valve with four ports (two inlet and two outlet) which varies flow through a terminal device by diverting a proportion of the flow through an integral “restricted” bypass avoiding the need for a separate piped bypass… Four-port valves are always designed as mixing valves but are commonly used in diverting applications.&lt;br /&gt;
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It suggests that typical applications include; modulating control of heating and cooling, outputs from small fan coil units or chilled beams (typically up to a 20 mm pipe size) in constant flow branches.&lt;br /&gt;
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--[[User:BSRIA|BSRIA]]&lt;br /&gt;
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= Related articles on Designing Buildings =&lt;br /&gt;
&lt;br /&gt;
* BSRIA articles.&lt;br /&gt;
* BSRIA definitions.&lt;br /&gt;
* Building services.&lt;br /&gt;
* Double regulating valve.&lt;br /&gt;
* Pipework.&lt;br /&gt;
* Tap.&lt;br /&gt;
* Three-port control valve.&lt;br /&gt;
* Two-port control valve.&lt;br /&gt;
* Types of valve.&lt;br /&gt;
* Valve.&lt;br /&gt;
&lt;br /&gt;
[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Products_/_components]]&lt;/div&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

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