An external exhaust valve is installed in the piping between the leak tester and the work to discharge air when the leak test is completed.
It can prevent the intrusion of foreign substances such as water, oil, and dust from work and piping into the leak tester, thereby preventing failures and deterioration in quality in advance. It is especially recommended for inspection devices that combine visual inspection for submersion and air leak testing. It can be used at test pressures of up to 4.9 MPa.
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basic information
Feature 1 A dedicated air-operated valve that suppresses the occurrence of leaks, minor volume changes, and temperature changes, which can be factors of error in leak tests. Feature 2 A structure that separates the moving parts and detection circuit to prevent malfunction of the exhaust valve due to dust (G3-M/G3-ME). Each port connecting to the workpiece and master is equipped with a dedicated filter (G3-M/G3-H). Feature 3 Due to the large flow rate, there is almost no impact on the pressurization time and exhaust time for the workpiece. Feature 4 An integrated structure that allows simultaneous exhaust operation on both the workpiece side and the master side. Control via pilot pressure is performed using an air leak tester compatible with external exhaust valves.
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Applications/Examples of results
Air leak test Prevention of debris contamination in the leak tester, prevention of water droplet contamination
Line up（4）
| Model number | overview |
|---|---|
| G3-M | Maximum operating pressure: 800kPa Pressure resistance: 1.0MPa Connection diameter: Rc1/4 Pilot pressure: 400~700kPa (supplied from the leak tester) Dedicated leak tester for low pressure/mid pressure external exhaust valve |
| G3-ME | Maximum operating pressure: 800kPa Pressure resistance: 1.0MPa Connection diameter: Rc1/4 Pilot pressure: 400~700kPa (supplied from the leak tester) Dedicated leak tester for low pressure/mid pressure external exhaust valve *This version does not include a ball valve |
| G3-H | Maximum operating pressure: 4.9MPa Pressure resistance: 7.5MPa Connection diameter: Rc1/4 Pilot pressure: 400~700kPa (supplied from the leak tester) Dedicated leak tester for high pressure external exhaust valve |
| G3-HE | Maximum operating pressure: 4.9MPa Pressure resistance: 7.5MPa Connection diameter: Rc1/4 Pilot pressure: 400~700kPa (supplied from the leak tester) Dedicated leak tester for high pressure external exhaust valve *This version does not include a ball valve |
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Company information
The Air Leak Tester from Cosmo Instruments started with the automation of cylinder block airtightness testing in 1970. It is utilized in various fields such as automotive parts, gas, water supply, medical, electrical, electronics, and food industries. Since 1983, we have begun our overseas expansion in line with the overseas development of Japanese automotive manufacturers. Currently, we are conducting proposal activities and after-sales service activities similar to those in Japan from 24 locations in 13 countries. Recently, to respond to the electrification of automobiles, we have enabled leak testing of electrification components such as battery cases and inverters, as well as fitting tests for various power connectors, contributing to our customers' CO2 emission reduction efforts. Additionally, we have donated pressure measurement equipment to technical schools in South Asia and Southeast Asia to improve the quality of education, engaged in technical exchanges with local machinery manufacturers, and worked to enhance the industrial foundation through the production of high-quality leak testing equipment locally. We will continue to deliver the value of "quality" by applying our wisdom on-site for our customers and to contribute to the development of local communities.