Hi Steve,
Actually, what I meant by asking the type of control valves was that I
wanted to know that should go for Gate valves, Globe valves or plug valves
for that matter.
Do let me know
Thanks
Vinay.
-----Original Message-----
From: Steve McKenzie [SMTP:Mechproj@xtra.co.nz] Sent: Thursday, October 23, 2003 3:01 PM To: <a href="/group/PipingDesign/post?postID=Q02HAehCBldFMudkCdq0RB5SVBMWG-m4pvSoPaRQw1xdbnjfVXDTJbXd302ktgAuup0kaUMPpLzf76tQi24VcokuP7-t">PipingDesign@yahoogroups.com</a> Subject: RE: [PipingDesign] RE: Water Jet Ejectors Hi Vinay Sharma common practice is to have an isolating valve upstream and downstream of the control valve, and a throttling valve in the bypass line. The isolating valves are so the control valve can be isolated for servicing, and the throttling valve provides some degree of flow/pressure regulation (sometimes manual operation) during control valve servicing. Cheers Steve McKenzie<a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a>
-----Original Message-----
From: ETSMech User Babrala [mailto:btsmuser@tatachemicals.com] Sent: Thursday, October 23, 2003 10:19 PM To: 'PipingDesign@yahoogroups.com' Subject: RE: [PipingDesign] RE: Water Jet Ejectors Friends, I have a doubt regarding the kind of valves to be placed in a control valve loop. There are two issues ??? 1. Which valves should I go for around the control valve ? 2. Which valve should I go for in the bypass line ? Regards, Vinay Sharma. -----Original Message----- From: Steve McKenzie [SMTP:Mechproj@xtra.co.nz] Sent: Thursday, October 23, 2003 2:35 PM To: <a href="/group/PipingDesign/post?postID=Q02HAehCBldFMudkCdq0RB5SVBMWG-m4pvSoPaRQw1xdbnjfVXDTJbXd302ktgAuup0kaUMPpLzf76tQi24VcokuP7-t">PipingDesign@yahoogroups.com</a> Subject: RE: [PipingDesign] RE: Water Jet Ejectors Hi Shah M. Tanweer I think we have come to the branch in the road. As far as "size" goes it is quite clear in the S&K website downloads that it refers to the suction and the discharge connections in inch NB. Have you looked at these? It also gives a sizing procedure. I suspect that if you do need 1300gpm to do the job, then the low efficiency of an ejector will make it a bad choice for continuous duty. Unless you specifically need an ejector then I suggest you look at alternatives such as liquid ring vacuum pumps. Or perhaps you need something like a jet scrubber. It is impossible to select as you have provided no process conditions. If you wish to persist with the ejector you could try contacting S-K with an enquiry; I have found them helpful in the past, and they manufacture. For liquid ring pumps, you could google Nash Kinema. In light of our correspondence to date, I would advise against you "designing" an ejector at this stage. I suggest you buy this one (ejector, vacuum pump or whatever) based on a performance spec, see how it works, and think about designing the next one. You may wish to read the article "Selecting Vacuum Systems" in Chemical Engineering magazine (McGraw Hill) Dec 14 1981. Thats it for me on this topic. Good luck Steve McKenzie -----Original Message----- From: Shah Muhammad Tanweer [mailto:smt_pk@yahoo.com] Sent: Thursday, October 23, 2003 8:31 PM To: <a href="/group/PipingDesign/post?postID=Q02HAehCBldFMudkCdq0RB5SVBMWG-m4pvSoPaRQw1xdbnjfVXDTJbXd302ktgAuup0kaUMPpLzf76tQi24VcokuP7-t">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] RE: Water Jet Ejectors Dear Steve McKenzie I remain thankful for your help. Can you guide me about the sizes if the water consumption is round about 1300 gpm. At example 5 and table 8 KARASSIK chapter 4, does not deel with high flow. Also please let me know What "SIZE" exactly mean. I mean what portion of ejector exactly Ever Yours Shah M. Tanweer ===== __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search <a href="http://shopping.yahoo.com">http://shopping.yahoo.com</a> ======================================== Discussion List sponsor: The fluid flow calculations website - www.LMNOeng.com - LMNO Engineering, Research, and Software, Ltd. ======================================= Information presented on this list is given as helpful advice, nonsense, carefully-considered calulation or any combination of the above. The intent is to spark discussion and encourage knowledge-sharing amongst professionals. If you blow yourself up by doing stuff remotely described by info gleaned from reading this list, you are an idiot. Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> ------------------------ Yahoo! Groups Sponsor ======================================== Discussion List sponsor: The fluid flow calculations website - www.LMNOeng.com - LMNO Engineering, Research, and Software, Ltd. ======================================= Information presented on this list is given as helpful advice, nonsense, carefully-considered calulation or any combination of the above. The intent is to spark discussion and encourage knowledge-sharing amongst professionals. If you blow yourself up by doing stuff remotely described by info gleaned from reading this list, you are an idiot. Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> ======================================== Discussion List sponsor: The fluid flow calculations website - www.LMNOeng.com - LMNO Engineering, Research, and Software, Ltd. ======================================= Information presented on this list is given as helpful advice, nonsense, carefully-considered calulation or any combination of the above. The intent is to spark discussion and encourage knowledge-sharing amongst professionals. If you blow yourself up by doing stuff remotely described by info gleaned from reading this list, you are an idiot. Your use of Yahoo! Groups is subject to
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 Thu Oct 23 05:38:00 2003
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