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The Fluid Systems Engineering and Management Blog

by Swagelok Northern California

Engineered To Perform Under Negative Pressure: Swagelok Ultra-Torr Vacuum Fittings

by Jeff Hopkins, on 2/13/14 8:00 AM

Exhibit and downloads for engineers and designers of vacuum systems

vacuum fittings
Stop by the exhibit next week or download information on our fittings, convoluted tubing, and hose used in vacuum systems. Get catalogs

Vacuum technology takes a different kind of thinking -- almost an upside-down kind of thinking -- since it means dealing with negative pressure. Some common terms can cause confusion because of conflicting definitions in the industry. For instance, high vacuum is a lower pressure than low vacuum.  An easy way to understand this is to remember that the starting point for positive and negative (vacuum) pressure is atmospheric pressure (1x105 or 100000 Pascal).  The further away from atmospheric pressure you go in either direction (up or down), the higher the positive pressure (up) or the higher the negative pressure ((vaccuum (down)).  Here is a chart that explains the different terms that are used to describe different levels of vacuum.  

Pascal (Scientific Notations) Pascal Degree of Vacuum
1x105 to 3x103   100000 to 3000 Low Vacuum
3x103 to 1x10-1  3000 to 0.1 Medium Vacuum
1x10-1 to 1x10-4  0.1 tp 0.001 High Vacuum
1x10-4 to 1x10-7 0.0001 t0 0.0000001 Very High Vacuum
1x10-7 to 1x10-10 0.0000001 to 0.0000000001 Ultra-High Vacuum (UHV)
<1x10-10  <0.0000000001  Extremely-Ultrahigh Vacuum (EHV or XHV) 

NCCAVS vacuum equipment exhibition 

Vacuum has become such an essential part of many industries that there are trade shows dedicated to showcasing equipment used in vacuum systems. Some of that will be on display in San Jose on Feb. 20 at the 35th Annual Vacuum Equipment Exhibition. Admission is free, and if you show up at 11am for the start of the exhibit, you can have a complimentary lunch. We'll be happy to talk to you about how we can help with any of your vacuum and fluid system needs.  The exhibit will be at the Holiday Inn San Jose Airport, 1350 N. First St., from 11am to 7 p.m.

Swagelok Ultra-Torr and other vacuum products on display 

But if you can't make it to San Jose that day, you can still download information and specifications on vacuum tubing products, our Ultra-Torr vacuum fittings, and other fittings Swagelok manufactures that are used in vacuum systems.  The Swagelok Ultra-Torr Vacuum fitting employs an o-ring seal that can be used on glass, metal or plastic tubing. Seal performance is maintained through repeated disconnects, and it has a knurled nut for easy finger tight assembly.  The Ultra-Torr fitting design has been helium leak tested to a maximum leak reate of 4x10-9 std cm3/s at ambient temperature. 

Note: This exhibit is also a good opportunity to get a demonstration of our Electronic Desktop Reference. The eDTR puts Swagelok catalogs, technical bulletins, installation instructions, videos, archives and more on a flash drive no bigger than your finger. You'll see in person how much easier it is to use than fumbling through multiple catalogs or binders to find what you need.

Additional Resources

type keyword here  Valve Sizing  
A QuickLook at Swagelok Northern California (PDF) Valve Selection and Sizing Resources  
Topics:Swagelok Northern CaliforniaFittingsVacuum

We perform under pressure

Your fluid systems can't fail—and they can't leak. That's why Swagelok Northern California offers mission critical solutions for the petrochem, semi, power, and oil and gas industries around the Bay Area and into NW Nevada. We manufacture and assemble reliable, customizable components that get the job done. Contact our team today to learn about custom solutions for your plant or refinery.

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