the complete article has a lot of goodies. recommended reading for aspiring
instrument and control engineers. Paul, how about maintenance/reliability
articles related to recirculation valves like those made by Yarway.
Appreciate website if any? Giving us headache on our carbonate pumps. heavy
deposit is the culprit. we've got the Yarway guys over here but not much
luck.
-----Original Message-----
From: Paul Bowers [mailto:pbowers@pipingdesign.com]
Sent: 30 May, 2001 4:12 AM
To: <a href="/group/PipingDesign/post?postID=_s9aLZjzMlctybXzHUUhVojHs4i9bINd2FnQySpIgryhT9NhGLhXzjKC20LFPTIZFCTPKp6uHAzAkCxGsj9UmxBs2tY">PipingDesign@yahoogroups.com</a>
Subject: [PipingDesign] New at PipingDesign.com: 29 May 2001
Control Valves
<a href="http://www.pipingdesign.com/controlvalves.html">http://www.pipingdesign.com/controlvalves.html</a>
Easy Way to Estimate Realistic Control Valve Pressure Drops HydrocarbonProcessing.com
<<When designing a new plant or revamping an existing one, a key task is to estimate or calculate pressure drop allowed for each control valve. For a control valve that has a pump or compressor upstream, there are three methods to do this. The traditional method is to allow 50% to 25% of the system frictional pressure drop (other than control valve pressure drop) as the control valve pressure drop. The second method is to calculate the allowed control valve pressure per an equation proposed by Connell.1 The third technique is to assign a minimum pressure drop to the control valve at maximum design flowrate. This article studies three typical systems that require calculating control valve pressure drop. It also studies the above-mentioned three control valve pressure drop estimation methods for a system with a pump or compressor.>>
Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Wed May 30 04:51:00 2001
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