RaXa is a flexible packing system with an innovative technology. There are no highly precise sealing surfaces or springs and nothing in the cartridge is fragile. The seals use a flexible sealant as sealing medium, which remains compressed in the system. A gas-operated piston ensures that the sealant is held at a pressure slightly above the pressure to be sealed. The sealant acts as an adaptive stationary seal and compensates shaft movements without affecting the sealing quality.