Manually operated pressure sprayer for non aggressive liquids. It is mainly used for the spraying of pesticides, chemicals and fungicides 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 tank it is possible to monitor the level of liquid. The smaller size pumping element is designed to reduce weight. The safety valve allows the device to be discharged at the end of use and prevents pressure overload.