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	<title>Surface Production Facility &#187; Type Of Devices</title>
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	<description>Oil and Gas Production Facility Design</description>
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		<title>Pressure Relief &#8211; Rupture Discs</title>
		<link>http://www.process-facility.com/pressure-relief-rupture-discs.html</link>
		<comments>http://www.process-facility.com/pressure-relief-rupture-discs.html#comments</comments>
		<pubDate>Fri, 25 Sep 2009 01:49:43 +0000</pubDate>
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				<category><![CDATA[Type Of Devices]]></category>
		<category><![CDATA[Pressure Relief]]></category>

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These are thin diaphragms held between flanges and calibrated to burst at a specified static inlet pressure. Unlike relief valves, rapture discs cannot reseal when the pressure declines. Once the disc ruptures, any flow into the vessel will exit through the disc, and the disc must be replaced before the pressure vessel, can be placed [...]]]></description>
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		<title>Pressure Relief &#8211; Pilot-Operated Relief Valves</title>
		<link>http://www.process-facility.com/pressure-relief-pilot-operated-relief-valves.html</link>
		<comments>http://www.process-facility.com/pressure-relief-pilot-operated-relief-valves.html#comments</comments>
		<pubDate>Fri, 25 Sep 2009 01:12:55 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Type Of Devices]]></category>
		<category><![CDATA[Pressure Relief]]></category>

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Pilot-operated relief valves use the pressure in the vessel rather than a spring to seal the valve and a pilot to activate the mechanism. Figure 13-6 is a schematic of a typical pilot-operated valve. A piece of tubing communicates pressure between the relief valve inlet and pilot. When this pressure is below the set pressure [...]]]></description>
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		<title>Pressure Relief &#8211; Balanced-Bellows Relief Valves</title>
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		<comments>http://www.process-facility.com/pressure-relief-balanced-bellows-relief-valves.html#comments</comments>
		<pubDate>Fri, 25 Sep 2009 01:07:23 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Type Of Devices]]></category>
		<category><![CDATA[Pressure Relief]]></category>

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		<description><![CDATA[




Balanced relief valves are spring-loaded valves that contain a bellows arrangement to keep back-pressure from affecting the set point. Figure 13-4 shows a cross section of a balanced relief valve, and Figure 13-5 is a schematic that shows how the valve operates. The bonnet is vented to atmosphere and a bellows is installed so that [...]]]></description>
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		<title>Pressure Relief &#8211; Conventional Relief Valves</title>
		<link>http://www.process-facility.com/pressure-relief-conventional-relief-valves.html</link>
		<comments>http://www.process-facility.com/pressure-relief-conventional-relief-valves.html#comments</comments>
		<pubDate>Fri, 25 Sep 2009 00:16:04 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Type Of Devices]]></category>
		<category><![CDATA[Pressure Relief]]></category>

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		<description><![CDATA[Figure 13-2 shows a cross section of a conventional relief valve and Figure 13-3 is a schematic that shows the valve&#8217;s operation. Convention al relief valves can be used anywhere that back-pressure in the relief header is low. They are common onshore where relief valves are fitted with individual tail pipes. On offshore platforms, they [...]]]></description>
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