User guide

21-5
Safety Groups
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Safety Groups
Safety groups of this type are used to protect pressurised water heaters according to the requirements
of DIN 4753, Part 1, DIN 1988 and DIN EN1488.
They are compact appliances which incorporate all the necessary safety devices such as check valve,
shutoff valve, test point and diaphragm type safety valve in one unit. The safety valve protects the
downstream cylinder, pressure vessel etc. by automatically opening when excess pressure occurs.
The check valve prevents back pressure, backflow and back syphonage of water from the hot water
unit.
With threaded male connections, set pressure 6,0 bar
With threaded male connections, set pressure 8,0 bar
With threaded male connections, set pressure 10,0 bar
Without fittings, set pressure 6.0 bar
Without fittings, set pressure 8.0 bar
Without fittings, set pressure 10.0 bar
Safety group with interchangeable safety valve insert, SG150
Approvals DVGW-approval requested
Media Water
Body material brass, dezincification resistant
Max. media temperature 40
o
C
Additional description For closed hot water storage units up to 200 litres according to DIN
4753 Part 1 and DIN 1988. Tested to TRD 721 for 1.0 to 10.0 bar
pressure range
• Fully approved for noise level protection to class 1
• Replacement insert tested to TRD 721
• Easy venting
• Meets KTW recommendations for potable water
Port connection type Port diameter DN size Set pressure Type
inch mm bar
external threads 1/2 15 6 SG150-1/2AA
external threads 3/4 20 6 SG150-3/4AA
Port connection type Port diameter DN size Set pressure Type
inch mm bar
external threads 1/2 15 8 SG150-1/2AB
external threads 3/4 20 8 SG150-3/4AB
Port connection type Port diameter DN size Set pressure Type
inch mm bar
external threads 1/2 15 10 SG150-1/2AC
external threads 3/4 20 10 SG150-3/4AC
Port connection type Port diameter DN size Set pressure Type
inch mm bar
––156 SG150-1/2EA
––206 SG150-3/4EA
Port connection type Port diameter DN size Set pressure Type
inch mm bar
––158 SG150-1/2EB
––208 SG150-3/4EB
Port connection type Port diameter DN size Set pressure Type
inch mm bar
––1510 SG150-1/2EC
––2010 SG150-3/4EC