Metallurgical High Vacuum Corporation

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High Vacuum News
 Tips and Hints to Keep your Pumps Running Strong  

August, 2013 -Volume 4, issue 2



In This Issue Links

Furnace Troubleshooting

MHV Capabilities Grow

Heat Treating Show

Conversion Chart

New Web Site



We want you to be better informed and get more from your vacuum processing system. We also want to let you know what is happening at Metallurgical High Vacuum so we may be of service. 


That's why we are sending you this newsletter that will let us keep in contact. 

                President's Corner

Geoff Humberstone

It may look like USA manufacturing is indeed going off-shore, but we still have a lot of it here. "Built in the U.S.A." is still good thing to believe in. 

Now a lot of people may believe that you can make more money with the click of a mouse, but it is in the making of products that creates the jobs and payrolls that help our families and our country

We recently finished and posted a short video that shows the skilled people in our facility making our "Survivor™ brand of vacuum pumps. We have shown with field experience of over 350,000 hours they can last longer, require less maintenance, and pay back the initial investment many more times than cheaper alternatives.  

 At MHV we believe in doing the best possible job for our customers. Quality comes first and last with us. We've grown our inventory of parts that we manufacture so customers don't have to stand in the back of a line or wait for the next boat shipment to arrive. That's what our online "Parts Express" was built for. We've even reverse-engineered components no longer being made to keep customers running. 

Here are some comments by Ryan DeArment of Channellock Inc., a family owned  manufacturer of USA Made tools:  




 Vacuum Tips: Looking for Failures in the System...


 Is It The Pump, Blower, Or Furnace? 


It's Monday morning and you can't pump your workhorse furnace below 40 millitorr.  You have helium leak-checked the most obvious spots and there are no leak indications. You have bled in a "puff" of helium into the mechanical pump gas ballast valve port to verify that you are able to see helium. This sort of clears the blower and mechanical pump.  Your hunch is an internal water leak and the 40 millitorr you are seeing is the vapor pressure of the ice formed by the leak.  Before blowing down the water from the internal heat exchangers and furnace shell (a big messy time consuming  job!), you need to know if all that trouble is warranted. A diagram of a typical furnace is shown below to illustrate the test connections



Isolate the Pumps

The next step is to blank off the blower inlet and verify a vacuum level below 10 millitorr (blower running)test point B.  Note that with the blower at rest and the mechanical pump running, you will normally see 500-1000 millitorr at the inlet since you are pumping dirty roughing piping with high outgas loads through the low conductance internal clearances of the blower at rest.



  Manufacturing Capabilities Grow at MHV


Advanced Technology 


Our capability for CNC manufacturing of shafts, main castings, and MHV-designed parts continues to grow. We not only employ precision CNC machining, vacuum welding, fabrication with leak checking-but offer the complete package including CAD design. Our newest machine is a Mazak Quick Turn 350-II with a hydraulic steady rest that enables us to turn out shafts and other parts accurately.


We can't always wait for an OEM to deliver parts for ongoing projects and pump repairs. Sometimes the OEM does not even still make the part. That's why MHV has CAD/CAM capabilities to extensively engineer and manufacture parts from shafts, pistons, eccentrics etc.







 The ASM Heat Treating Society and the American Gear Manufacturers Association are partnering to create an exciting mix of education, technology, networking and exposition opportunities - all at the 27th ASM Heat Treating Conference and Exposition and Gear Expo. Come to the Indiana Convention Center, Indianapolis, on September 16-18th to learn about the latest developments.


Metallurgical High Vacuum will be in BOOTH # 1639 Stop by and see our latest developments. Contact us by phone or e-mail if you need complimentary EXPO passes.


 Heat Treating Master Sessions  

 In addition to a comprehensive technical program at this year's show celebrating the 100-year anniversary celebration of the ASM Heat Treating Society (beginning as the Steel Treaters Club in Detroit), a highlight of the program will be three special Heat Treating "Master Series" Sessions that will focus on heat-treating pioneers whose research transformed heat treating technology.

The sessions will include lectures by current experts in the heat treating field on the contributions and impact of past heat-treating "giants" Walter Jominy, Marcus Grossmann, and Edwin Northrup on heat-treating technology.



Conversion Chart

Here's a handy chart to have when you you need to change units. 








































MHV Web Site

Our web site continues to grow with more information and easier search capabilities.The URL is the same:

The search box is at the top-right of each page. Just type in a part number or name into the box and click the enter key; a list of results will be displayed for you to pick the one you want. When looking for Stokes part numbers, please enter the full 9 digits and dashes.

Things will be changing as we fine tune and add content. Our goal is to help our customers with useful information. 



 Here's a special deal on vacuum pump oil. 

When you purchase a 55 gallon drum of Formula F Rotary Piston pump oil we'll give you a 5-gallon container of Formula H Blower lube oil free. (Offer valid through August 31, 2013).

 Shaft Seal Kit for 6" Blowers

Customers have asked for a kit that resolves seal problems on Roots™ 6-inch blowers by replacing the original lip-type seals with precision mechanical shaft seals.  The robust mechanical seals are designed to last longer and stand up to rugged operating conditions. In addition, they simplify future maintenance. Available "off the shelf".  

Part Number RC-1011.


Contact us for quotes and more information: (877) 787-9880  


 Call or write us with your questions, and let us know any suggestions and ideas you may have about the newsletter.   Click to E-mail 

 Feel free to call on our team at MHV to help with your vacuum needs. You'll find we can respond quickly to your requests.



Geoff Humberstone

Metallurgical High Vacuum Corporation


 6708  124th Avenue, Fennville, MI 49408-9632

 Copyright (c) 2013--Metallurgical High Vacuum Corp. All rights reserved

More in this category: High Vacuum News - April 2013

Parts Express

toolboxMHV Parts Express, lets you choose items you need from our extensive inventory of vacuum pump or blower parts and repair kits.

MHV Network


6708 124th Avenue
Fennville, MI 49408

Voice: (269) 543-4291
Toll free: 877-787-9880
Fax: (269) 543-4750
Contact us by e-mail