<body><script type="text/javascript"> function setAttributeOnload(object, attribute, val) { if(window.addEventListener) { window.addEventListener('load', function(){ object[attribute] = val; }, false); } else { window.attachEvent('onload', function(){ object[attribute] = val; }); } } </script> <div id="navbar-iframe-container"></div> <script type="text/javascript" src="https://apis.google.com/js/platform.js"></script> <script type="text/javascript"> gapi.load("gapi.iframes:gapi.iframes.style.bubble", function() { if (gapi.iframes && gapi.iframes.getContext) { gapi.iframes.getContext().openChild({ url: 'https://www.blogger.com/navbar.g?targetBlogID\x3d8968604820003269863\x26blogName\x3dChemical+%26+Process+Technology\x26publishMode\x3dPUBLISH_MODE_BLOGSPOT\x26navbarType\x3dBLUE\x26layoutType\x3dCLASSIC\x26searchRoot\x3dhttps://webwormcpt.blogspot.com/search\x26blogLocale\x3den\x26v\x3d2\x26homepageUrl\x3dhttp://webwormcpt.blogspot.com/\x26vt\x3d6505904876529004088', where: document.getElementById("navbar-iframe-container"), id: "navbar-iframe" }); } }); </script>

Chemical Process Technology

Continue to learn tips, knowledge and experience about Chemical Process Technology...

Enter your email address:


CLOSE WINDOW


 

Chemical & Process Technology

A place to share knowledge, lesson learnt...

Wednesday, March 19, 2008

Display problem ? Click HERE


Check valve slam is one of the common problem encounter in rotating equipment discharge e.g pump, compressor, etc. As mentioned in earlier post "How to Select a Check Valve (NRV) Quantitatively ?" one of the requirement is for a "good" check valve is non-slam characteristic.

For a pumping system with a check valve installed on the discharge, whenever the pump is shut, reverse flow is formed quickly and approaching check valve. One of the requirement to avoid check valve slam is the check valve shall be closed faster than the reverse flow acting on the disc. You may the following animation and see how a check valve with the disc closure is faster than the reverse flow and avoid damage of check valve and severe surge pressure.




As the closure of valve disc is affected by few factor such as disc travel distance, reverse flow travel length, etc. How should you predict if a check valve would experience slam and severe surge ?

A methodology for predicting check valve slam is one of the article you may read to identify if a selected check valve would experience slam during closure time.

Related Post


WebWorm
Continue receive FREE stuff & Update.......Subscribe by Email OR RSS
Any comments / advices ?..........Drop it in comment field (below) or send a private email to me...

Labels: ,

posted by Webworm, 4:31 PM

0 Comments:

Post a Comment

Let us know your opinion !!! You can use some HTML tags, such as  <b>, <i>, <a>

Subscribe to Post Comments [Atom]

Home:

<< Home