Honeywell SM110 Product specification sheet

Construction

The safety valve comprises:

• Angled housing

• Adjustment spring

• Diaphragm

• Security cap with part label

Materials

• Brass housing

• Spring steel adjustment spring

• High grade synthetic material security cap

• Hot water resistant elastomer diaphragm

EN0H-1366GE23 R0509 • Subject to change

SM110

Diaphragm safety valve

for closed heating systems

Product specification sheet

Application

Membrane safety valves of this type are used to protect closed
heating systems according to EN 12828.

In accordance with statutory requirements, the diaphragm safety
valve is preset to the required fixed set pressure by the manufac­turer and is sealed with an embossed security cap marked with
the test badge and pressure rating to prevent unauthorised
tampering with the setting. Subsequent alteration of the setting is
not permitted and is impossible without destroying the security
cap. The preset pressure is embossed on the security cap.

Special Features

• Certified to Pressure Equipment Directive 97/23/EC, Refe­rence No. CE 0036

• Standardised discharge connection

• With lifting device

• Protected against subsequent changing of the default
settings

Range of Application

The membrane safety valve is only suitable to drain the following
media from closed heating systems according to EN 12828 for
protection against exceeding pressure

Medium Water or glycol-water mixture,

according to VDI 2035
Liquids of the fluid group 1 and 2 (pres-

sure device guideline, item 9) which do
not affect the materials used.

Technical Data

Installation position Horizontal with safety cap pointing up
Opening pressure Factory preset to 1.5, 2.0, 2.5, 3.0, 4.0 or

6.0 bar
Subsequent alteration of the setting is not

permitted and is impossible without

destroying the security cap
Operating temperatureMax. 120 °C
Connection size Internal thread on inlet

Internal thread on outlet

External thread on inlet

thread on outlet

Valve size is defined by the size of the inlet

connection

1

/2", 3/4",

1

/2", 3/4", 1"

1

3

/2" with internal

/4"

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SM110 Diaphragm safety valve

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REintritt

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Method of Operation

Diaphragm safety valves of this type are directacting safety
valves in which the disc is pushed up by the pressure from the
system against a spring which is holding the valve closed. If the
opening force exceeds the force exerted by the spring, then the
valve disc is lifted off the valve seat and the valve discharges the
medium. In accordance with the requirements of the standard,
the full discharge capacity of the valve will be achieved when the
system pressure climbs to no more than 10% above the set
pressure of the valve. Full shutoff must be achieved if the system
pressure falls to below 80% of the nominal set pressure of the
valve. For valves rated up to 3.0 bar, the closing pressure can be

RAustritt

taken as 0.6 bar minimum.

Options
OS.-No. Set pressureConnection

size Inlet
SM110- 1/2ZA2.5 2.5 bar Rp
SM110- 1/2ZA3.0 3 bar Rp
SM110- 1/2A1.5 1.5 bar Rp
SM110- 1/2A2.0 2.0 bar Rp
SM110- 1/2A2.5 2.5 bar Rp
SM110- 1/2A3.0 3.0 bar Rp
SM110- 1/2A4.0 4.0 bar Rp
SM110- 1/2A6.0 6.0 bar Rp
SM110- 3/4ZA2.5 2.5 bar Rp
SM110- 3/4ZA3.0 3.0 bar Rp
SM110- 3/4A1.5 1.5 bar Rp
SM110- 3/4A2.5 2.5 bar Rp
SM110- 3/4A3.0 3.0 bar Rp
SM110- 3/4A4.0 4.0 bar Rp
SM110- 1/2AA1.5 1.5 bar Rp
SM110- 1/2AA2.0 2.0 bar Rp
SM110- 1/2AA3.0 3.0 bar Rp

1

/2" IG Rp1/2" IG

1

/2" IG Rp1/2" IG

1

/2" IG Rp3/4" IG

1

/2" IG Rp3/4" IG

1

/2" IG Rp3/4" IG

1

/2" IG Rp3/4" IG

1

/2" IG Rp3/4" IG

1

/2" IG Rp3/4" IG

3

/4" IG Rp3/4" IG

3

/4" IG Rp3/4" IG

3

/4" IG Rp1" IG

3

/4" IG Rp1" IG

3

/4" IG Rp1" IG

3

/4" IG Rp1" IG

1

/2" AG Rp3/4" IG

1

/2" AG Rp3/4" IG

1

/2" AG Rp3/4" IG

Connection
size Outlet

Connection size Inlet R
Connection size Outlet R

1

/2" IG

1

/2" IG

3

/4" IG

3

/4" IG

1

/2" IG

3

/4" IG 1" IG

3

/4" IG

1

/2" AG

3

/4" IG

Dimensions (mm)

60
33
46

∅ D

H

60
33

o

32

T

62
33
46

60
33
46

62
36

46
Weight g 135 145 140 150 140
Maximum permissible heat input (kW) 50 100 50 100 50
TÜV Approval Nos. - - TÜV · SV · ..* - 2017 · 13 · H · 2,5bar

TÜV · SV · ..* - 2017 · 13 · H · 3bar
..* valid Approval No.
Only the products with an outlet diameter larger than the inlet diameter are TÜV-certified.

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EN0H-1366GE23 R0509 • Subject to change

Installation Example

SM110 Diaphragm safety valve

Installation Guidelines

• Mount the safety valve at the highest point of the heat gene­rator or in its immediate vicinity on the flow line

• The installation must be carried out so that:
o no shut-off fittings, restrictions or strainers are located

Typical Applications

Membrane safety valves are installed according to their specifi­cation upstream from heat generators.

The following is a typical application:

• closed heating systems

between safety valve and heat generator
o good access is provided for service and maintenance
o that the safety valve is positioned above the heat generator
o that between the safety valve and heat exchanger a max.

1 m long straight connection line with the size of the inlet

diameter is installed

• The safety valve must be mounted so that in its installed
condition no external forces act on it

• The discharge line must be performed to the size of the safety
valve outlet diameter and may not have more than 2 elbows
and or be longer than 2m

• The discharge line must be installed with an incline

Maintenance

We recommend conducting the measures listed below regularly and to enter into a maintenance agreement between operating
company and installation company.

Operation Interval Carried out by

Inspection Function check by verifying the response: While the system is operating,

briefly open the safety valve by turning the cap. After closing the cap the
valve must close again the backed up water drain completely.

Maintenance If a malfunction is detected, a repair can be attempted by opening and

EN0H-1366GE23 R0509 • Subject to change

closing the cap several times. A replacement is necessary if this action
is not successful.

Every six months User or specialist

Annually Specialist

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SM110 Diaphragm safety valve

Automation and Control Solutions

Honeywell GmbH
Hardhofweg
D-74821 Mosbach
Phone: [phone]
Fax: [phone]
http://europe.hbc.honeywell.com
www.honeywell.com

Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Rolle, Z.A. La
Pièce 16, Switzerland by its Authorised Repre­sentative Honeywell GmbH

EN0H-1366GE23 R0509
Subject to change without notice
© 2009 Honeywell GmbH