Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv

6 comments

Rate

Valvemech Participant Join Date: Feb 2010 Location: Indian in United Arab Emirates Posts: 4	Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/20/2010 7:12 AM
	Difference between Pressure Sustaing valve and Pressure reducing valve
	Register to Reply
	User-tagged by 1 user

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

These comments received enough positive votes to make them "good answers".

Anonymous Poster	#1 Re: Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/20/2010 8:48 AM
	Both are almost same and both are put inline (unlike Relief valves that are usually on branch) The pressure reducing valve maintains the downstream pressure. The feedback is from the downstream pipeline and the valve adjusts its orifice to maintain the pressure in the downstream. Pressure sustaining valve takes its feedback signal from upstream. It adjusts its orifice to maintain the pressure upstream, regardless of flow and other characteristics. So the difference is the point from which feedback is taken. Both the cases the pump is oversized in terms of flow and pressure, and the additinal in reducing valve is bypassed through relief line (branched out) whereas in sustaining valve through inline drain.
	Register to Reply Good Answer (Score 4)

Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#2 In reply to #1 Re: Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/20/2010 1:29 PM
	Excellent description. I tried to give it a GA, but the system is apparently overloaded and not accepting votes. Some alternative terms for pressure sustaining valve are inlet pressure regulator or back pressure regulator. A pressure reducing valve is also known as an outlet pressure regulator. There are also differential pressure regulators that maintain a constant difference between inlet and outlet pressures, receiving feedback from both. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
	Register to Reply

ducon Guru Join Date: Dec 2006 Location: Hop around Toronto, New York & Karachi Posts: 1876 Good Answers: 19	#3 In reply to #1 Re: Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/20/2010 4:00 PM
	Good one. I rated but you received so many that it won't accept. Are you the "know-it-all" Guest? who i know! __________________ I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
	Register to Reply

Anonymous Poster	#4 In reply to #3 Re: Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/21/2010 1:11 AM
	I am a regular on sabbatical . And we know each other at CR4 having contributed on same posts many time. In fact you had not been lately visible (a bit infrequent) as seem to be a lot of others even Milo is a bit low nowadays or may be our target posts do not match . As a guest I am just looking how the other regulars rate the posts - by name of the poster or the merit of the post. And I am disappointed.
	Register to Reply Off Topic (Score 5)

ducon Guru Join Date: Dec 2006 Location: Hop around Toronto, New York & Karachi Posts: 1876 Good Answers: 19	#5 In reply to #4 Re: Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/21/2010 2:03 AM
	even Milo is a bit low nowadays. Any news of Sparky? maybe the"Cat' would know? __________________ I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
	Register to Reply

Anonymous Poster	#6 In reply to #5 Re: Whatis the difference between Pressure sustaining valve & Pressure Reducing Valv 02/21/2010 2:53 AM
	Sparky missing. Hopefully nothing wrong with him. It is now more than a year. So is our Chinese friend (cnpower) and haven't seen Epke too around for long so are quite a few others. (May be they are guesting like me? who knows )
	Register to Reply Off Topic (Score 5)

These comments received enough positive votes to make them "good answers".

Copy to Clipboard

Anonymous Poster (3); ducon (2); Tornado (1)

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (72 right now) Show Members