Honeywell SM120 PRODUCT DATA
SM120 Diaphragm Safety Valve
FOR CLOSED HEATING INSTALLATIONS
PRODUCT DATA
Application
The SM120 diaphragm safety valve provides the last line of security for heating systems if the prescribed safety controls fail. In an emergency they must therefore have the capacity to discharge the whole contents of a cylinder in the form of steam. In normal system use they do not come into operation.
Features
•For heating systems to DIN 4751
•Construction tested to TRD 721
•Protected against subsequent resetting
•For large output systems up to three valves can be fitted in parallel with separated discharges
•With venting facility
Range of Application
Closed heating or solar systems. Not suitable for water storage heaters.
Design
The safety valve comprises:
•Housing
•Spring bonnet
•Diaphragm
•Seal disc
•Venting knob
Materials
•Brass housing and spring bonnet
•Hot water resistant elastomer diaphragm and seal disc
•High quality synthetic material venting knob
Specifications
Flow temperature |
max. 120°C (248°F) |
Capacity |
50–350 kW |
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(45 000–300 000 kcal/h) |
Connection size |
R 1/2" to R 1 1/4" |
NOTE: The valve size is determined by the size of the inlet connection.
Copyright © 2001 Honeywell AG • All rights reserved |
(EN0H-1324GE23 R0401) |
SM120
Dimensions |
Function |
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The diaphragm safety valve is normally closed. If the |
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pressure in the boiler exceeds the set pressure of the safety |
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valve, then the force against the valve disc exceeds the force |
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exerted by the spring and the valve opens. |
Versions
SM 120 - . . . A = Set pressure 2.5 bar,
for closed heating systems
SM 120 - . . . B = Set pressure 3.0 bar,
for closed heating systems
Fig. 1. Dimensions
NOTE: All dimensions in mm unless otherwise stated.
Connections |
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Dimensions |
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Weight |
kW |
kcal/h |
OS-No. |
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Inlet |
Outlet |
H |
h |
l |
D0 |
kg |
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Set pressure 2,5 bar |
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1/2" |
3/4" |
93 |
28 |
36 |
15 |
0,3 |
50 |
45 000 |
SM 120 - 1/2 A |
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3/4" |
1" |
99 |
34 |
42 |
16 |
0,4 |
100 |
90 000 |
SM 120 - 3/4 A |
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1" |
1 1/4" |
137 |
41 |
51 |
22 |
0,9 |
200 |
175 000 |
SM 120 - 1 A |
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1 1/4" |
1 1/2" |
144 |
47 |
57 |
27 |
1,1 |
350 |
300 000 |
SM 120 - 1 1/4 A |
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Set pressure 3,0 bar |
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1/2" |
3/4" |
93 |
28 |
36 |
15 |
0,3 |
50 |
45 000 |
SM 120 - 1/2 B |
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3/4" |
1" |
99 |
34 |
42 |
16 |
0,4 |
100 |
90 000 |
SM 120 - 3/4 B |
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1" |
1 1/4" |
137 |
41 |
51 |
22 |
0,9 |
200 |
175 000 |
SM 120 - 1 B |
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1 1/4" |
1 1/2" |
144 |
47 |
57 |
27 |
1,1 |
350 |
300 000 |
SM 120 - 1 1/4 B |
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Home and Building Control |
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Honeywell AG |
Phone: (49) 6261 810 |
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Hardhofweg |
Fax: (49) 6261 81309 |
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D-74819 Mosbach |
braukmann@honeywell.com |
http://europe.hbc.honeywell.com |
(EN0H-1324GE23 R0401) |
2 |
Subject to change • All rights reserved |
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