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AT 8070BK

Air separator AT 8070BK

Automatic air-/particle separator of steel. Gas-/particle separator and dirt protection.

Dimension rangeDN 50 to DN 150
Temperature range0 °C to 110 °C

Product information

Main facts

Dimension rangePN Temperature rangeMaterial

DN 50-150

10 0 °C to 110 °CSteel

Range of application

For automatic air separation of heating and cooling systems where the fluid is water or glycol. Can be mounted in systems with a mix of water/glycol and water/ethanol, if control and oversight is increased. The valve should not be used in systems with a mix of water/salts.

Program text

PSF.141 Air separator
Automatic air-/particle separator AT8070BK... of steel, PN10, gas-/particle separator with dirt protection and a purge valve.

Quality assurance

Fulfills the AFS 1999:4, 8§ standards and shall not be CE-marked. All separators are functional- and density tested.


1Body and ends of steel, with weld ends or flanges PN16.
2Lifting-loops to ease at installation
3The spirotube is designed to separate even the smallest microbubbles.
4Manual air valve for removal of large volumes of air at comissioning
as well as edge drainage for liquid pollutants.
5Automatic air valve supplied with 15mm extraction. Threaded exhaust
the air valve does't leak and con not be closed
6The ventilation mechanism is located in a separate chamber protected from dirt.
7Large dirt chamber makes it rarely need to drain.

Dimensions and weight

Connection50 65 80 100 125 150
A 260 260 370 370 525 525
B 630 630 785 785 1045 1045


E (welded ends)60,3 76,1 88,9 114,3 139,7 168,3
E (flanges)506580100125150
Weight (weld/flange)12/1712/1830/3830/4070/8370/86
Dimensions in mm, weight in kg

Function and design

The uniqe construction removes loose air as well as dirt particles. The surface magnifier generates motionless zones above and below the flow. The air rises in the motionless zone to be collected in the air chamber and is then released through the automatic valve. Dirt particles that are heavier than water settles and is collected in the dirt chamber to flush out the system through the drain valve. This can be done during full operation. The velocity decreases as the fluid flows into the separation body. Free gas bubbles, particles and sludge separates while passing through the separator.

Separate bubbles lifts and enter the float body. The liquid level goes down and the float sinks. When the float, that is conneced to the separation mehcanism via a bar, reaches a certain level, the mechanism is affected and air can flow into the free. When the float rises again, the mechanism closes.
The large volume of the air chamber and special design makes the liquid level never reach the drainage mechanism, even if the air in the chamber is compressed to 10 bar.

Technical information

Connection50 65 80 100 125 150
Max flow m³/h 8 15 20 30 50 75
Pressure drop bar 0,015 0,020 0,018 0,013 0,016 0,017
Values above apply at max. speed 1 meter/second.


Since the micro bubbles are released at the hottest point in the plant, the component should be placed on the hottest spoint in the system.

In a heating system the supply line is often the warmest spot in the plant.

In a heating system, the warmest point is usually on the supply line, as close to the heater as possible. In order to maintain a good absorption effect, the static pressure at the site of installation should not exceed 15-20mvc.


Maintenance free, no filter changes are necessary. However, for a good- and safe operation, the sludge chamber must be emptied regularly.


Marked with dimension, max. operating pressure, max. operating temperature and the manufacturers name