Vacaero

Manufacturers of heat treating and brazing vacuum furnaces and controls, complete hot zone and vacuum furnace retrofits, thermal spray coatings, plasma, HVOF and paint coating services.

VAC AERO Service Experience Trust
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Archives for November 2013

VAC AERO Specializes in Custom Designed Vacuum Furnaces

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VAC AERO provides custom furnace designs and process capabilities to suit your specific requirements.

In addition to standard vacuum heat treating and brazing furnaces, VAC AERO also manufactures custom vacuum systems for a wide variety of special processing applications. VAC AERO’s skilled team of engineers works closely with the customer from concept through design, final manufacture and installation. VAC AERO designs and builds standard Gas Quench furnaces for maximum durability, reliability and trouble-free operation and provides an outstanding level of training, field and technical support based on decades of commercial heat treating experience.

Pressure and Throughput Distribution in Vacuum Systems

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Last time the discussion was about throughput and conductance in vacuum systems. This time we will look at the pressure profile throughout the vacuum system in a slightly different way than it was shown last time. The first thought might be that once the vacuum system is under vacuum carrying out the process, the lowest pressure will be in the vacuum chamber and that the highest pressure will be at the primary pump exhaust which will be atmospheric pressure. As we see from Fig. 1, this is not quite correct.

Fig. 1 shows how the pressure changes through the system and actual values of P pressure and S speed are given in the table, Fig. 2. The pressures shown assume that the chamber has been evacuated (pumped down) to the process pressure needed and conditions are stable.