User manual HONEYWELL SM120 DATASHEET

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Manual abstract: user guide HONEYWELL SM120DATASHEET

Detailed instructions for use are in the User's Guide.

 [. . . ] 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.  [. . . ] Not suitable for water storage heaters. 

Specifications
Flow temperature max. 120°C (248°F) 50­350 kW (45 000­300 000 kcal/h) R 1/2" to R 1 1/4"

Design
The safety valve comprises: · Housing · Spring bonnet · Diaphragm · Seal disc · Venting knob

Capacity Connection size

NOTE: The valve size is determined by the size of the inlet connection. 

Materials
· Brass housing and spring bonnet · Hot water resistant elastomer diaphragm and seal disc · High quality synthetic material venting knob

Copyright © 2001 Honeywell AG · All rights reserved

(EN0H-1324GE23 R0401)

SM120

Dimensions

Function
The diaphragm safety valve is normally closed. If the pressure in the boiler exceeds the set pressure of the safety valve,  then the force against the valve disc exceeds the force exerted by the spring and the valve opens. 

Versions
SM 120 - . A = Set pressure 2. 5 bar,  for closed heating systems SM 120 - .  [. . . ] Dimensions NOTE: All dimensions in mm unless otherwise stated. 

Connections Inlet 1/2" 3/4" 1" 1 1/4" 1/2" 3/4" 1" 1 1/4" Outlet 3/4" 1" 1 1/4" 1 1/2" 3/4" 1" 1 1/4" 1 1/2" H 93 99 137 144 93 99 137 144

Dimensions h 28 34 41 47 28 34 41 47 l 36 42 51 57 36 42 51 57 D0 15 16 22 27 15 16 22 27

Weight kg 0, 3 0, 4 0, 9 1, 1 0, 3 0, 4 0, 9 1, 1

kW

kcal/h

OS-No. 

Set pressure 2, 5 bar 50 100 200 350 50 100 200 350 45 000 90 000 175 000 300 000 45 000 90 000 175 000 300 000 SM 120 - 1/2 A SM 120 - 3/4 A SM 120 - 1 A SM 120 - 1 1/4 A SM 120 - 1/2 B SM 120 - 3/4 B SM 120 - 1 B SM 120 - 1 1/4 B

Set pressure 3, 0 bar

Home and Building Control Honeywell AG Hardhofweg D-74819 Mosbach
(EN0H-1324GE23 R0401)

Phone: (49) 6261 810 Fax: (49) 6261 81309 braukmann@honeywell. com
2

http://europe. hbc. honeywell. com
Subject to change · All rights reserved [. . . ]

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