SG150
Safety group
with interchangeable safety valve insert
Product specification sheet
Application
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.
Special Features
• DVGW-approval requested
• Fully approved for noise level protection to class 1
• Replacement insert tested to TRD 721
• Easy venting
• Meets KTW recommendations for potable water
Construction
The safety group comprises:
• Housing with test socket G
• Connections (versions AA, AB and AC)
• Shutoff valve
• Check valve cartridge
• Approved safety valve exchange insert
• Drain connector
• Insulation shells
• Pressure gauge optional
Materials
• Dezincification resistant brass housing
• Brass threaded connections
• Cut-off valve, test socket, plug-in backflow stopper, safety
valve replacement set and flow-guide made of high-quality
plastic
• Fibre-reinforced NBR diaphragm
• NBR seals
EN0H-1355GE23 R1007 • Subject to change
• EPP insulation shells
1
/4"
Range of Application
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.
Medium Water
Operating pressure Maximum at least below 20 % opening
pressure of safety
Technical Data
Installation position Horizontal and vertical
Opening pressure Set by manufacturer at 6.0, 8.0 or 10.0 bar
Subsequent alteration of the setting is not
permitted and is impossible without
destroying the security cap
Operating temperature
Connection size
Max. 40 °C
1
/2" + 3/4"
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SG150 Safety group
Method of Operation
Safety groups of this type combine check valve, shutoff valve,
test point and diaphragm type safety valves in one appliance.
Flow first passes through the check valve and this flow holds the
valve disc in the open position against the force of a spring.
The downstream safety valve is a direct operating safety valve.
That is, the opening force operates against the force of a spring.
The shutoff valve enable the check valve to be checked and
serviced.
Options
SG150- ... AA = With threaded male connections, 6.0 bar
SG150- ... AB = With threaded male connections, 8.0 bar
SG150- ... AC = With threaded male connections, 10.0 bar
SG150- ... EA = Without fittings, set pressure 6.0 bar
SG150- ... EB = Without fittings, set pressure 8.0 bar
SG150- ... EC = Without fittings, set pressure 10.0 bar
Connection size
Connection size R
Weight Version A
approx. kg 0.7
Version E
1
/2"
0.55
3
/4"
0.9
0.67
Funnel outside-ø (mm) D 40 40
Dimensions (mm)
L
l
1
H
h
165
55
124
28
186
67
132
30
For water heaters with capacity (litres)
200 200
Safety valve
Approval numbers
TÜV · SV · ..*2 - 700 · (
TÜV · SV · ..* - 617 · (1/2", 3/4") · W · p (8, 10 bar)
1
/2", 3/4") · W · p (6 bar)
DIN/DVGW Approval No. requested
..* valid Approval No.
Accessories
M08M Pressure gauge
Housing ∅ 50 mm, connecting pin above G
Partition: 0-16 bar
D150 Pressure reducing valve
Pressure reducer D150-1/2 for completion of the
M08M
safety group SG 150 with connection size 1/2”
D160S Pressure reducing valve
Pressure reducer D160S-3/4 for completion of the
safety group SG 150 with connection size 3/4“
D150/D160S
VST06-A Connection set
Threaded connections
1
/4"
VST06-A
2 www.honeywell.com
VST06-B
VST06-B Connection set
Solder connections
EN0H-1355GE23 R1007 • Subject to change
Installation Example
SG150 Safety group
Arrangement of the safety group as channel design
Arrangement of the safety group as corner design
Installation Guidelines
• Safety group must be fitted in the cold water supply to the hot
water storage unit
• Installation in horizontal or vertical pipeline possible
• The installation must be carried out so that:
o There are no shutoff valves or fittings, narrowing of the
pipework or strainers between the water heater and the
safety valve
o Good access is provided for service and maintenance
o The safety valve is fitted above the top of the water heater
to avoid the need for draining down when exchanging the
safety valve insert
• If there is no drainage facility in the room where the heater is
installed, then the safety valve may be fitted in an adjacent
area. DIN 1988, part 2 is to be observed
Typical Applications
Safety groups of this type are installed in accordance with their
specification upstream of water heaters.
The following are some typical applications:
• Central hot water supply systems
• Hot water storage units
Maintenance
In accordance with DIN 1988, Part 8, the following operations should be carried out regularly. A planned maintenance scheme is
recommended.
Operation Interval Carried out by
Inspection Backflow stopper: functional check by opening the test plug and closing
Annually User
the cut-off valve.
Safety valve: Check operation as follows: With the system operating,
Every six months User or specialist
open the venting device. The resulting water flow must fully drain away.
When the ventil is released,the valve must fully close.
Maintenance Safety valve: If a malfunction occurs,this may be cured by repeated
Annually Specialist
manual opening and closing of the valve. If this method does not
EN0H-1355GE23 R1007 • Subject to change
succeed, then an overhaul of the valve will be necessary.
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SG150 Safety group
Spare Parts
Safety group SG150, from 2007 onwards
1
No. Description Dimension Part No.
1 Safety valve
1
3
5
4
5
2
exchange insert
Approval No. - TÜV · SV · ..* - 617 Approval No. - TÜV · SV · ..* - 700 6 bar
8 bar
10 bar
1
/2" A152-1/2AA
3
/4" A152-3/4AA
1
/2" A152-1/2AB
3
/4" A152-3/4AB
1
/2" A152-1/2AC
3
/4" A152-3/4AC
1
/2"+3/4"·W·p
1
/2"+3/4"·W·p
..* valid approval No.
2 Blanking plug
with O-ring R
1
/4"
S06K-1/4
(5 pcs.)
3 Discharge tundish TA160S
4 Check valve insert
5 Sealing ring
(10 pcs.)
1
/2" 2166200
3
/4" 2110200
1
/2" 0901443
3
/4" 0901444
Automation and Control Solutions
Honeywell GmbH
Hardhofweg
D-74821 Mosbach
Phone: (49) 6261 810
Fax: (49) 6261 81309
http://europe.hbc.honeywell.com
www.honeywell.com
Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Ecublens, Route
du Bois 37, Switzerland by its Authorised Representative Honeywell GmbH
EN0H-1355GE23 R1007
Subject to change without notice
© 2007 Honeywell GmbH
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