Valve Bypass

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Chandrakumar Participant Join Date: May 2009 Posts: 1	Valve Bypass 05/28/2009 7:04 AM
	What is the use of providing Bypass arrangement in the valves?
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: VALVES 05/28/2009 7:07 AM
	What valves? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#2 Re: VALVES 05/28/2009 7:37 AM
	Bypass arrangement? or balancing lines? __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
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basriraqi Active Contributor Join Date: May 2009 Location: Iraq-Basrah Posts: 14	#3 Re: VALVES 05/28/2009 11:05 AM
	hi chandrakumear: you can repeat your equ. for more to appear what are you need exactly? __________________ Iove all
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Bill Guru Join Date: Dec 2005 Location: Clemson, South Carolina Posts: 1722 Good Answers: 18	#4 Re: VALVES 05/28/2009 11:38 AM
	Usually used for balancing hot/chilled water systems. __________________ We have met the enemy and he is us . . . Walt Kelly
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Simon Wan Guru Join Date: Apr 2007 Posts: 577 Good Answers: 10	#5 Re: Valve Bypass 05/28/2009 10:19 PM
	We does not have clear picture regarding your By Pass Valve. If I am not mistaken, I do believed that, your By Pass Valve is for piping. If so, the actual usage of the by pass valve is to by pass the flow, in case if you need to do some repair at the main valve. For example in the water filters system, I do not know if you had see a water filter system before. In this water filter system, the inlet pipe is connected to a TEE and a inlet valve before to the water filter inlet. At the outlet of the water filter, it also connected to a outlet valve and a TEE and the final pipeline will be to your machine or your consumption. So,.. At both TEE it will be connected to a valve call the By Pass Valve. The function of this By Pass Valve is for you to by pass the water flow, without going thru the filters while you can dismantle out the water filters for services, repair or whatever thing you want to do with it. Most of the By Pass Valve is use for emergency by pass, in case there is a need for some emergency repair need to be carry out on the spot. __________________ Management is just like a bunch of Monkey sitting on a tall tree. Some climb to the highest branch and some at the lowest branch. The highest Monkey look down and see a lot of happy faces but the lower Monkey looks up and see nothing but all the....
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ducon Guru Join Date: Dec 2006 Location: Hop around Toronto, New York & Karachi Posts: 1876 Good Answers: 19	#6 Re: Valve Bypass 05/29/2009 12:25 AM
	You mean by-pass of a Pressure Reducing valve or Temperature Controlling Valve? This is done with 3 Valves to isolate the PRV /TCV to take it off the line for repairs in event of malfunction. Similar done for steam traps. __________________ I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
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Tal Member Join Date: Aug 2008 Posts: 8	#7 Re: Valve Bypass 05/29/2009 2:07 PM
	The bypass is used when the valve needs to be maintained and the fluid flow must continue . The bypass should a manual or automatic control .
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PennPiper Guru Join Date: Feb 2007 Location: Bayonet Point, Florida Posts: 635 Good Answers: 61	#8 Re: Valve Bypass 05/29/2009 5:59 PM
	On page 3 of this site: http://www.ejprescott.com/products/ValvesTap/LargeDiameterDiscValves.pdf They show large diameter Gate Valves with a Bypass from the upstream side to the downstream side. This Bypass is required because there is too much pressure on the disc when the valve in closed and It cannot be opened. The Bypass bleeds the flow thus the pressure from the upstream side and allow the Valve to be opened. Is this what you are asking about? __________________ Do it once and do it right
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basriraqi (1); Bill (1); ducon (1); PennPiper (1); PWSlack (1); sb (1); Simon Wan (1); Tal (1)

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