In contrast to the electric piston device, the pneumatic device is operated with compressed air via an air motor and is therefore approved for ATEX zones.
This technology can therefore also be used in explosion-protected areas. The material is conveyed via a material piston. All material-carrying parts of the appliances are made of stainless steel. These devices are also suitable for resins with high viscosity and all low-viscosity media as well as paints and varnishes. Mineral filling materials cannot be processed or can only be processed to a limited extent (very fine cement paste in small quantities!). In contrast to electric piston devices, pneumatic devices stop as soon as the gun is closed or the set back pressure is reached.