Posts Currently viewing the category: "VTI Articles"

The distributed Evacuation and Charging system from the VTI/PCU alliance provides the most efficient single point evacuation and charge capability with no disconnect/reconnects between operations. This minimizes the chance of connector leakage problems after product evacuation. Second only to having an actual leak, water is the greatest enemy in vacuum conditioning A/C…(Read More)

VTI’s SmartStation™ ESPlus for evacuation of air-conditioner condensers or compressors incorporates mass-spectrometer analysis of the gas being pumped from the product, thus providing improved product quality and reliability and the potential for increased plant productivity. A major benefit of the analysis capability of this system results from its ability to determine the…(Read More)

These stations can evacuate and perform a “rate of rise test” on air conditioners or condensing units. With the ability to process analog input from the vacuum gauge, the Allen Bradley Micrologix 1200 PLC based control system at each station monitors the base pressure of the vacuum pump, tracks the pressure in the unit during…(Read More)

This test station, used on a relief valve production line, automatically performs a leak test, measures the “cracking” pressure, and measures the resealing pressure for a variety of different relief valves. The PC-controlled system automatically configures the test parameters based on the model number of the parts under test. The station has tooling that…(Read More)

This test system, designed and built by VTI, leak tests heat exchanger coils using Helium to test to a leak rate equivalent to 0.25 ounce per year of R22 leaking from 250 psig into atmosphere. After a pressure decay test with Nitrogen at 80 psig to detect gross leaks, the sensitive leak test is…(Read More)

At the Repair Station, leak sites are located with this tester which utilizes pressurization with Nitrogen to locate gross leaks, and Helium “sniffing” and “spraying” to locate smaller leaks. Heat-exchanger coils (or other types of parts) which have been found to have leaks in a pass/fail type of Leak Testing System, such as…(Read More)

Each coil is over 3-ft in diameter by 1-ft high and weighs over 500 lbs. The coil is pressurized with a helium-air mixture and sealed, and is raised into a chamber which is then evacuated. Extended pilot runs were made at VTI’s plant to demonstrate performance and train customer personnel, prior…(Read More)

This leak detection system designed and built by VTI performs a Helium Mass- Spectrometer Leak Test and also a Proof Pressure Test on heat exchangers up to 48 in. x 96 in. x 10 in. The system tests by the “Inside/Out” method and has a fully automated test cycle including the pass-fail decision…(Read More)

Battery cases are 100% tested on a production line using this Helium Leak Testing System. The system is fully automated except for final positioning of the battery case, allowing efficient testing of various size parts. The battery cases are tested for leakage to a level of 1 x 10-4 atm-cc/sec (6 x…(Read More)

This two-chamber system uses helium to leak test condenser and evaporator coils to the leak-rate specification of 1/10 oz of refrigerant per year (10-6 std-cc/sec of helium) at a production rate of 1 part every 30 seconds. During this cycle, the parts are also automatically pressure tested and flow…(Read More)