In the production and assembly process of electric drive components for new energy vehicles, air tightness testing is a crucial step. The liquid cooling water channels of electronic control assemblies, permanent magnet motors, as well as various electrical connectors and vent valves, all require rapid sealing. The material of water channel pipe orifices varies, including stainless steel, aluminum alloy, and injection molding; meanwhile, the overall structural design is compact, and the operating space for many pipe orifices is extremely limited. How to select a suitable rapid sealing solution for different scenarios, which can not only meet the operational requirements of sealing, inflation, and fluid passage, but also take into account efficiency and reliability, has always been a key concern for on-site engineers.

Air tightness test for waterway pipe connections: scenario-based selection of GripSeal quick-seal connectors

Addressing the aforementioned practical pain points, the GripSeal rapid sealing joint series provides a set of scenario-based selection logic, categorized into the following three directions.

Firstly, in scenarios involving water or fluid passage, priority should be given to ensuring non-destructive protection of the pipe orifice

When the tested pipe orifice is made of plastic or aluminum alloy, the surface is prone to scratches due to friction, affecting the sealing effect or product appearance. In this case, it is recommended to use the GripSeal G70P quick seal connector series. This series adopts a sliding sleeve operation design, with the main body made of polymer material, featuring non-destructive locking characteristics, which can effectively avoid scratching and damage to the pipe orifice surface; at the same time, it maintains a large flow diameter, ensuring smooth passage of liquid media without affecting testing efficiency.

Secondly, when the radial space outside the nozzle is limited, this type of scenario is suitable for plugging or inflation testing

Inside the motor housing or electronic control assembly, the radial space around some water channel pipe orifices is too narrow to accommodate larger external clamp-type connectors. The GripSeal G35 quick seal connector series is designed specifically for such scenarios. It adopts an internal expansion structure, featuring a pressure-assisted design (the higher the test pressure, the stronger the sealing force), and comes with a built-in locking mechanism. With a small outer diameter, it can be directly inserted into the inner diameter of the pipe orifice; a 90-degree handle is turned to complete the locking and sealing process. The operation is lightweight and it can stably withstand medium to high-pressure testing environments (up to 70Bar).

Third, rapid sealing and inflation testing of ordinary metal pipe orifices

For metal materials such as stainless steel and pipe orifices with relatively ample space, the GripSeal G70 quick seal connector series provides an efficient and versatile solution. This series employs a sliding sleeve operation, allowing for connection with a single, light push; the end face sealing ring boasts high pressure resistance and is easy to replace; the straight-through design minimizes airflow resistance, ensuring accurate test results.

Each of the three schemes has a clear positioning: The G70P quick-seal coupling boasts non-destructive locking and large bore as its core advantages, making it suitable for plastic or aluminum alloy pipe orifices that require surface protection; the G35 quick-seal coupling features a small outer diameter and high pressure resistance, suitable for inner diameter sealing where radial space is limited. Its pressure-assisted design enhances the sealing force in sync with the test pressure; the G70 quick-seal coupling strikes a balance between versatility, robustness, and ease of operation, making it ideal for daily testing of ordinary metal pipe orifices.

Air tightness test for water pipe orifice: scenario-based selection of Greer rapid sealing connectors

In practical production line applications, this approach of selecting models based on scene matching brings direct efficiency improvements. Operators do not need to repeatedly adjust their techniques, as connections are made in one step, significantly reducing the time for individual testing cycles. Different pipe orifices correspond to different connector types, greatly reducing the risk of misoperation during mixed-line production. Especially in high-volume testing stations such as water cooling boards and motor housings, the changeover time is reduced, and overall production smoothness is significantly improved.

The GripSeal quick-seal connector has been widely used in air tightness testing for components such as electric drives, battery packs, engines, and cooling systems in new energy vehicles. For conventional pipe diameters, standard specification products can be directly selected; if non-conventional interfaces or special working conditions are encountered, a customized connection solution can also be developed based on the test section samples provided by the user. The ultimate goal remains the same: to make the sealing operation simple, reliable, and repeatable under real production line conditions.