Chemical Vacuum Experiments on Gasses and Liquids

Did you know that gasses and liquids and even solids behave differently at different absolute pressures? For Example, water will start to boil at a lower and lower temperature as the pressure is decreased. Water can boil at room temperature if the pressure is decreased to 20 Torr of absolute pressure. Other phenomenon which can happen is that materials can fuse together or weld in high vacuum.

Our client is in academia performing research on Gas Phase and Liquid Phase Experiments. They required a large vacuum chamber that has a spring supported lid. The also asked us to provide them with an electrical NEMA-15 outlet so that they can power up some of their electrical devices inside of the vacuum chamber without compromising the vacuum.

In addition to the above, they requested a 25 Multipin Vacuum Feedthrough. This feedthrough along with the electrical outlet are placed on the rear wall. Finally, they requested 6 x 1/2 inch NPT liquid or gas vacuum feedthroughs that are placed on the remaining 4 exposed walls of the chamber. We plugged these feedthrough ports so that our client is able to remove the plug and hook up their liquid or gas line onto the port and run it into the vacuum chamber. The port is threaded from both inside and outside.

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Our clients prefer to work with us because we are Experts in Custom Fabrication (especially Polymer Fabrication). Check out some of our other items we carry that you can combine/integrate with your systems or projects.

Internal Pressurization ASTM F2096 Leak Testing Systems
Internal Pressurization (ASTM F2096) Leak Testing Systems are instruments that are used during the Quality Control process to discover leaks in sealed packages. As opposed to the vacuum bubble leak test, where the specimen is subjected to a vacuum, the internal pressurization integrity test creates a pressure difference and drives the air through a leak by internally pressurizing the specimen. Our Internal Pressurization Leak Testing Systems are designed and built to conform to the ASTM F2096 Protocol Standard.
Rotary Vacuum Feedthroughs
Rotary Vacuum Feedthroughs are devices that will enable you to physically rotate a specimen inside the vacuum chamber while vacuum present without decreasing the vacuum.
Our Work: Chamber for Vacuum Extrusion System
This is a custom acrylic vacuum chamber build for a high volume manufacturer of parts which are fabricated using vacuum extrusion techniques. The challenge was to build a vacuum chamber system which mated on two perpendicular surfaces; on the bottom and on the rear of the chamber. This was accomplished by incorporating a double gasket mechanism on the bottom and incorporating a clamping mechanism on the rear.
Related Articles: Anatomy of the Pressure Decay, Vacuum Decay, and Force Decay Curve
How do you know that you have a good part during your leak test? In order to understand your leak test, you must first understand the Test Decay Curve and what it tells you about your test specimen. There is a certain way that a test specimen behaves during the leak test.