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Fit neither ball valve nor butterfly valve if you can get away September 28, 2018

Posted by pumpsinoil in : guoyuanpump.com , add a comment

I don’t think I’ve ever before seen a pump taken coming from a large hydraulic excavator that didn’t have at least some cavitation erosion damage.I know, there are exceptions..

All the ingredients which could rule out my other 2, more preferred options (no valve or ball valve). But a lot of other things could result in it too. And the only way to know for sure is always to compare two pumps Medium Pressure Pumps Suppliers operating under identical conditions—one with a butterfly valve installed andf the other without.

And exactly how bad can that be? Well in fact, I can think of various applications where butterfly valves utilized as pump intake isolation valves. With that said, I am ready to concede intake-line isolation valves are sometimes absolutely essential. Or it’s just certainly not practical to pump, say, THREE, 000 gal of oil from the tank.

In which case it’s wise to assure they’ve got proximity switches to prevent the pump(s) from being started once the valve(s) are closed! But in spite of the odd exception, my preferred method to pump intake line isolation is usually: fit neither ball valve nor butterfly valve if you can get away with it. But if either of considerations are a problem, then a butterfly valve could be the only choice left.

In this severe-duty application the damage is usually regarded as fair damage. Large hydraulic excavators can be a common example. But even in these kinds of cases, pulling a vacuum around the reservoir headspace will still do the job.