Specification sheet

SG162D
Safety group with pressure reducing valve
for pressurised hot water storage units up to 200 litres
Product specification sheet
Application
Safety groups of this type are controls to DIN 4753 Part 1 and
DIN 1988 for the protection of pressurised hot water storage
units with capacities up to 200 litres.
They are composite assemblies which integrate in one unit all
necessary safety components, including check valve, shutoff
valve, test point and diaphragm-type safety valve.
6.
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 and this reduces the pressure from the inlet supply to the
pressure required for the system. It also prevents uncontrolled
dripping from the safety valve when the inlet pressure fluctuates.
EN0H-1305GE23 R0610 • Subject to change
Special Features
•
Check valve is DVGW approved
•
Safety valve is TÜV approved
•
Easy venting
•
Can be fitted on the left or right
•
Pressure reducing valve with inlet pressure balancing - inlet
pressure fluctuation does not influence the outlet pressure
Construction
•
Housing and connection pipes are chrome plated
The safety group comprises:
•
Meets KTW recommendations for potable water
•
Housing
•
•
Shutoff valve
Certified to Pressure Equipment Directive 97/23/EC, Reference No. CE 0035
•
Check valve with test plug
•
Approved safety valve
•
Tundish and trim plate
•
Chrome-plated connection pipes
•
Pressure reducing valve
Materials
•
Chrome-plated hot-pressed brass housing
•
High-quality synthetic material check valves
•
High quality synthetic material test plug
•
Chrome-plated hot-pressed brass safety valve housing
•
High quality white synthetic material tundish and trim plate
•
Chrome-plated brass connection pipework
•
Chrome plated brass pressure reducing valve housing
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
Inlet pressure
Outlet pressure
Operating pressure
Water
Max. 16 bar
4 bar
Maximum at least below 20 % opening
pressure of safety
Technical Data
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 tempera- Max. 70 °C
ture
1/ "
Connection size
2
Clearance from wall 70 mm and 100 mm
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27
SG162D Safety group with pressure reducing valve
Method of Operation
Safety group integrates a check valve, shutoff valve, test point,
diaphragm safety valve and pressure reducing valve in one
appliance.
Water from the inlet water supply first enters the pressure reducing valve. This functions on a force equalising system - the force
of a moving piston operates against the force of an adjustment
spring. The inlet pressure has no influence on the opening or
closing of the valve. Inlet pressure fluctuations therefore have no
influence on the outlet pressure. The check valve has a moving
valve disc and flow pushes this open against the force of a
spring. The downstream safety valve is a direct operating safety
valve - the opening force operates 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.
Options
SG162D-1/2A = Safety valve opening pressure 6.0 bar
SG162D-1/2C = Safety valve opening pressure 10.0 bar
Connection size
Nominal size diameter
Dimensions
1/
2"
15
100
100
100
a)
b)
c)
d)
e)
f)
Shutoff valve
Test plug for check valve
Check valve
Diaphragm-type safety valve with venting device (replaceable)
Tundish (no special vapour trap required)
Pressure reducing valve
TÜV · SV · ..* - 701 · 1/2" · W · p
EN0H-1305GE23 R0610 • Subject to change
Safety valve
Approval numbers
..* valid Approval No.
R
DN
(mm)
L
H
h
28
www.honeywell.com
SG162D Safety group with pressure reducing valve
Installation Example
Installation Guidelines
Typical Applications
•
Safety group must be fitted in the cold water supply to the hot
water storage unit
•
The installation must be carried out so that:
Safety groups of this type are installed within the scope of their
specification on the inlet to hot water storage units of up to
200 litres nominal capacity
•
•
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
For safety reasons, during heat up water may emit from the
discharge pipework
Do not close!
The pressure reducing valve is necessary:
•
If the inlet pressure is greater than 80% of the safety valve set
opening pressure
The following are some typical applications:
•
Closed hot water storage units
•
Reverse calorifiers
It is important that no attempt be made seal off the pipework
to stop this discharge!
Maintenance
In accordance with DIN 1988, Part 8, the following operations should be carried out regularly. A planned maintenance scheme is
recommended.
Operation
EN0H-1305GE23 R0610 • Subject to change
Inspection
Maintenance
Interval
Carried out by
Pressure reducing valve: Visual inspection on pressure gauge of the set Annually
outlet pressure at zero flow and at peak flow (large take off).
User or specialist
Check valve: Check operation by opening the test point and closing the Annually
lower shutoff valve.
User
Safety valve: Check operation as follows: With the system operating, Every six months
open the venting device. The resulting water flow must fully drain away.
When the ventil is released,the valve must fully close.
User or specialist
Pressure reducing valve: If no stable outlet pressure can be established Every 1 to 3 years
depending on
at zero flow during the visual inspection, the pressure reducing valve
insert should be removed for checking and if necessary be replaced. system operating
conditions
Specialist
Safety valve: If a malfunction occurs,this may be cured by repeated
manual opening and closing of the valve. If this method does not
succeed, then an overhaul of the valve will be necessary.
Annually
Specialist
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29
SG162D Safety group with pressure reducing valve
Spare Parts
Safety Group SG162D, from 1998 onwards
No. Description
3
2
3
1
3
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
Part No.
Safety valve exchange
Approval No. - TÜV · SV · ..* - 771 - 1/2" · W · p
1/ "
6 bar
A162-BA
2
1/ "
10 bar
A162-BC
2
..* valid Approval No.
1
2
Flanged offset angled 1/2"
tube
3
Connection set
complete
1/
2"
0900625
4
Angle tube O
1/
2"
2597200
5
Tundish
1/
2"
0901768
6
Pressure reducing
valve
1/
2"
D162-1/2A
6
4
Dimension
5
Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Z.A. La Pièce 16,
1180 Rolle, Switzerland by its Authorised Representative Honeywell GmbH
EN0H-1305GE23 R0610
Subject to change without notice
© 2010 Honeywell GmbH
2596600