Air Valves

This type of valve is used to treat trapped air in pipes caused by factors such as line setup or pump operation.

Category: Valves

Description

Application: Distribution network, water treatment plant, water transmission, agriculture and industrial applications up to 70°C.
Fluid type: raw water, drinking water, sea water
Material type:
- Body and disc: Ductile iron EN 1563/EN-GJS-400-15
- Rubber material: EPDM & NBR
Nominal size: DN 50 – 200 mm
Nominal pressure: PN10-PN16-PN25
Design & Produce Technical Specifications
- Flange dimensions according to DIN EN 1092-2 (DIN 2501)
- Paint coating: All cast iron parts are coated with blue epoxy powder paint RAL5005 or RAL5015 with a minimum thickness of 250 microns and with an electrostatic spraying mechanism, in accordance with DIN 30667 standard.
Advantages of air valves: In this type of valve, the aeration and evacuation process is performed automatically in the lines. This type of valve is used for air trapped in the pipes, which is created by factors such as starting the lines or using the pump.

Pressure test according to DIN EN 12266-1 and ISO 5208

Air valves manufactured by ATBR Company are produced in the following three types:

Single Chamber-Single Orifice Air Valve

Single Chamber-Single Orifice

Single Chamber-Double Orifice Air Valve

Single Chamber-Double Orifice

Double Chamber-Double Orifice Air Valve

Double Chamber-Double Orifice

Air valve (single chamber, two orifices)

Abresan Tolou Bahar Roud (ATBR)

To prevent freezing, the air valve should be installed inside the pond or enclosed environment.
The air valve must be installed completely vertically and level. Failure to do so will cause the float ball to get stuck and the valve to malfunction.
A slide valve (on/off valve) should be installed in the flow path and below the air valve to allow for the fluid to be cut off in case of emergency.
Before installing the air valve, thoroughly clean the inside of the pipes.
Be sure to use a flat rubber gasket to seal between the air valve and the pipe flange.
The screws connecting the air valve to the pipe flange must be tightened evenly and in a crisscross pattern (one every other).

Slowly open the slide valve installed below the air valve so that the air valve gradually fills.
After the air valve is filled and the pressure reaches the operating value (usually after the air flow is stopped), the valve should be completely sealed and no air should escape.
To prevent the slide valve under the air valve from closing unnecessarily, it is recommended to remove its handle.

(The handle can be reinstalled if an emergency shutdown is needed)
By observing the above, the air valve will be ready for operation.
The performance and sealing condition of the air valve should be inspected and controlled at least every six months.

The air valve should be kept in its original packaging until installation.
The storage location should be dry, away from direct sunlight, and free from dust.
If milk has been in storage for more than 2 years, it should be retested and controlled before use.

Abresan Tolou Bahar Roud (ATBR)