Automatic valve for charging / suctioning air for piping systems. The fan tip is inserted into the road cap or approximately 250 mm above the ground. The exhaust / suction valve is simply removable for control. The airbag has a built-in automatic valve. The discharged water is discharged from the inside.
3 independent automated functions:
Function 1 – Drainage (through the large opening) of the pipeline when the pipeline is filled with water.
Function 2 – Air supply (through a large hole) when the pipeline is empty.
Function 3 – Separate the air / air supply (through a small grid) during normal operation of the pipeline.