Valve against Rats, cockroaches, odors, and damming Drainage or Sewerage Systems

摘要

Characterized by tubular form in the main body.Being such that the walls are thick and wide,And featuring an outstanding peak in the lower part of the valve, and then decreased slightly in size and thickness. Finally, there is a door attached to the Interior of the Discoid ShapeValve.In addition, the Unidirectional Valve is operating, so that the Wastewater passing through the Valve housing.Can not return; and in turn allow any external Agent can enter.Where the gate valve is Actuated by the Sewage and then automatically closed, because the lower part of the valve is a Relief,As the stop for the door