|Dimension range||PN||Temperature range||Material|
G 1/2 - G 3/4
|10||0 ºC to 65 ºC||Brass|
Range of application
Backflow preventer is used to protect drinking water systems internally and externally against siphon backflow and pressure overload return flow. Prevention coverage for fluid up to category 3. The backflow preventer is of the type CA in accordance with SS-EN 1717. Used e.g. for refilling of heating and cooling systems.
PSG.260 Backflow preventer module
Backflow preventer AT 1169-XXM with pressure controlled intermediate chamber. Preventer module type CA for max prevention of fluid category 3 according to SS-EN 1717.
In accordance with SS-EN 1717. Tested according to prEN 14367.
|2||Connection screw-nut/socket||DZR brass|
|4||Sealing ring||NBR and EPDM|
|5||Cone insert with check valve||Synthetic|
Dimensions and weight
|G 1/2||142||114||82||97||DN 40||0,51||1,0||225|
|G 3/4||150||114||82||93||DN 40||0,70||1,1||230|
|Dimensions in mm, weight in kg.|
Function and design
Backflow preventer type CA covers the risks up to fluid category 3 connection of drinking water. I.E. "Fluid that entails a certain health risk through presence of one or multiple harmful substances".
The preventor is divided in three pressure zones through double check valves and intermediate chamber with drainage. The intermediate chamber gives a safety zone between the incoming drinking water and the polluted water downstream. When the differential pressure between the inlet zone and the intermediate zone sinks under 10% of the inlet pressure the intermediate chamber drains to the atmosphere. The preventer protects from both siphon backflow and pressure overload backflow.
The backflow preventer is supplied with an integrated strainer in the preventor module inlet.
|Minimum working pressure||1,5|
|Maximum working pressure||10|
|Kv, m3/h by ∆p=1,0 bar||0,7|
Maintenance and spare parts
The product does not entail reparation on top of cleaning. The inlet strainer can require cleaning from dirt and metal shavings. The cone insert with check valve can be mounted out by screwing the draining pipe in the bottom.
Manufacturer, DN, PN, flow direction arrow and manufacturing number.
How to order
|Complete protection module|
|G 1/2 (DN15)||1169-15M||502 10 36|
|G 3/4 (DN 20)||1169-20M||502 10 37|