Damper with pneumatic actuator (dampers with pneumatic cylinder, pnevmoballony) stamps PNZ, dampers with electrical actuator (dampers with electric actuator, electrobalance) stamps ELZ is designed to control the release of grain from silos, hoppers, process equipment in the complex gravity of the equipment. The presence of pneumatic, electric actuators, limit switches allow you to control the flaps with the remote control and use them in the General system of management and automation of complex equipment.