Alleviates safety concerns

The new WRA is designed to prevent excessive water spillage during the tip change of spot welding guns in manufacturing plants worldwide. The innovation is ideal for busy automotive body-in-white shops; for example, as excessive water spillage within a weld cell environment can present a number of hazards, including electrical shock, slip danger, equipment damage and, potentially, the manufactured product being scrapped.

The WRA works by cleverly reducing the water pressure in the closed-off cooling circuit. This has the effect of eliminating the problems of water being expelled under pressure during a tip change.
 
In a typical application where the WRA is installed, the (automatic) tip changing process will commence with shutting off the water inlet/outlet via the cooling water control panel. Once the cooling water supply is blocked, the pneumatic control valve assembled on the Parker Hannifin water retract actuator will be de-energised. The actuator will then make a retract stroke, resulting in an increase of water volume in the cooling system.