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New Facility "Dynamically Stresses" New and Rebuilt Vacuum Pumps

Fennville, MI--- Until now, most replacement vacuum pumps were tested under actual conditions only when they were first connected to a customer's heat treating chamber. Now, Metallurgical High Vacuum puts their new and rebuilt pumps and blowers through their torturous "stress test tank" at the factory to assure performance under pump-down conditions.

 

Fennville, MI--- Until now, most replacement vacuum pumps were tested under actual conditions only when they were first connected to a customer's heat treating chamber. Now, Metallurgical High Vacuum puts their new and rebuilt pumps and blowers through their torturous "stress test tank" at the factory to assure performance under pump-down conditions.

As Geoff Humberstone, MHV President, comments: "We have always done a blank off test and a 20-24 hour run-in on our rotary piston pumps.  While this is good, using the pump to evacuate a vessel of known volume is the real acid test.

We can check dynamic performance with actual pump-down times. The dynamic test verifies the CFM of the pump because you know how long it takes to reach a given vacuum level.  We can also check for excess oil out of the exhaust- this is a problem customers run into all the time. Also, by monitoring the line current, we can see motor amperage under highest pump load conditions during roughing.

In all vacuum blowers, the timing is critical as the impellers must mesh exactly for dynamic sealing and pumping performance. The older Stokes blower design keys the timing gears onto the impellers and some timing shift can occur during high load conditions.  The newer Stokes design uses "Ringfeder" locking elements which have no "slop" and if not torqued properly, timing can and does shift.

What all this means is that blower testing requires more loading than a blank-off test. By backing the blower with a 412 pump, you can seat the impellers.  In the case of the 615-7 bypass blower, you pump down from atmosphere.  This also tests the bypass valve and at the same time seats the impellers."

Dave Petersen, VP-Sales, notes, "Dynamic testing in our "Torture Tank" gives our customers an extra margin of security that our pumps meet and exceed their performance and longevity needs, reducing their total cost of ownership.

There are so many ways we can save a customer from having problems; I wonder why everyone doesn't test this way. We do and that's what is important to our customers."

Metallurgical High Vacuum has put their vacuum experience of over three decades on the line for their customers who depend on their vacuum processing systems 24/7 with reliability regardless of the original manufacturer: Stokes, Kinney, Tuthill, MD, Leybold, Dresser Roots, Varian, or Edwards.

About Metallurgical High Vacuum

Metallurgical High Vacuum Corporation is a vital supplier in the vacuum technology industry. With over a quarter-century in the business, they have earned a reputation for responsiveness with high-quality engineering and manufacturing that is unsurpassed. Customers depend on MHV for keeping their operations running, and costs under control. MHV products and services include new pumps and systems, vacuum piping and manifolds, flexible connectors, vacuum valves, custom oil filtration systems, helium leak testing, and field repair. Rental pumps and blowers are also available; call to check inventory.

Contact us at 269-543-4291, Fax: 269-543-4750, E-mail: [email protected] to learn more.

Metallurgical High Vacuum Corp., 6708 124th Avenue, Fennville, MI 49408, United States

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