Knapsack sprayer with manual operation for aggressive liquids. It is mainly used for spraying pesticides, fungicides and chemicals in the treatment of plants. Lightweight and with a comfortable shoulder strap, the tank is made of recyclable polyethylene and treated to prevent UV rays from penetrating. Through the transparent band it is possible to monitor the level of liquid in the tank. The exclusive large pumping unit is designed to create pressure quickly and keep it constant. The safety valve allows the device to be discharged at the end of use and prevents pressure overload. It is possible to choose between various lances and with different nozzle configurations.