User guide

21-6
Safety Groups
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Accessories
Spare Parts
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, diaphragm type safety valve and pressure reducing 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. In addition, a balanced seat pressure reducing valve is fitted on the inlet
to control the supply pressure to that required for the system.
With threaded male connections, set pressure 6,0 bar
Pressure gauge with housing diameter 50 mm, connecting pin above G 1/4,
range 0 - 16 bar
M08M16
Pressure reducing valve for completion of the safety group SG150 with connection
size 1/2"
D150-1/2
Pressure reducing valve for completion of the safety group SG150 with connection
size 3/4"
D160S-3/4
Connection set with 1/2" threaded male connections
VST06-1/2A
Connection set with 3/4" threaded male connections
VST06-3/4A
Connection set with 1/2" solder connections
VST06-1/2B
Connection set with 3/4" solder connections
VST06-3/4B
Discharge tundish
TA160S
Plug with O-ring R1/4" (packs of 5)
S06K-1/4
Safety valve insert, set pressure 6 bar
A152-1/2AA
Safety valve insert, set pressure 6 bar
A152-3/4AA
Safety valve insert, set pressure 8 bar
A152-1/2AB
Safety valve insert, set pressure 8 bar
A152-3/4AB
Safety valve insert, set pressure 10 bar
A152-1/2AC
Safety valve insert, set pressure 10 bar
A152-3/4AC
Check valve insert for safety valves 1/2"
2166200
Check valve insert for safety valves 3/4"
2110200
Safety group with interchangeable safety valve insert and pressure reducing valve,
SG150D
Approvals DVGW-approval requested
Media Water
Body material brass, dezincification resistant
Max. media temperature 40
o
C
Pressure setpoint range 1,5 ... 6 bar
Setpoint scale yes
Transparant strainer chamber yes
Balanced seat design yes
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
• Pressure reducing valve with inlet pressure balancing - inlet
pressure fluctuation does not influence the outlet pressure
• Easy venting
• Meets KTW recommendations for potable water
Port connection type Port diameter (inch) DN size (mm) Set pressure (bar) Type
external threads 1/2 15 6 SG150D-1/2AA
external threads 3/4 20 6 SG150D-3/4AA