Eliminating the drawbacks of conventional flap gates! Introducing a backflow prevention gate for small drainage pipes.
The "Auto Gate Junior" is a flap gate of the "balance weight" type that was born from the new technology of the "Auto Gate" developed by our company. Under normal conditions, the gate opens due to the action of the balance weight and smoothly drains water. Additionally, during floods, it quickly closes due to the interaction between the balance weight and the float. 【Features】 <Bearings> ■ It uses submerged, maintenance-free bearings on the rotating shaft to reduce friction resistance, allowing the gate to open and close smoothly. <Gate Opening> ■ The gate is in a 10° open position under normal conditions, which does not hinder the flow of water. ■ There is no need to lift the gate under normal conditions. *For more details, please refer to the PDF document or feel free to contact us.
Inquire About This Product
basic information
【Other Features】 <Door Opening> ■ There is almost no accumulation of soil or debris inside the pipe, and foreign objects such as trash are rarely caught between the door body and the stop. <Balance Weight> ■ A balance weight is provided on the door body via a rotating shaft, allowing it to open and close with a small force (slight changes in water level). ■ It does not miss the timing for closing during floods and opening after floods. ■ Reduces flow obstruction during internal water drainage. <Float (Inside)> ■ A float is attached to the back of the door body, acting as a pressing force against gate closure during floods. *For more details, please refer to the PDF document or feel free to contact us.
Price range
Delivery Time
Applications/Examples of results
For more details, please refer to the PDF document or feel free to contact us.
catalog（1）
Download All Catalogs
Company information
The Civil Engineering and Steel Structure Division of Asahi Innovex is engaged in the design, manufacturing, and installation of public works such as sluices, bridges, aqueducts, dust collectors, steel pipes, and various steel structures. In addition to our headquarters in Sapporo, we operate six sales offices nationwide. We are also actively involved in the development of new products. In particular, our "Auto Gate," which automatically opens and closes without the need for power, protects people from floods and has been installed in over 1,300 locations nationwide. This technology has been highly regarded as a Japanese disaster prevention technology that should be recognized globally, and it received the Prime Minister's Award at the 5th Monozukuri Nippon Grand Award in 2013. We contribute to social activities that protect the precious lives and property of the public through the development of social infrastructure, bringing the technology of "Asahi" to life.