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1. Safety Guidelines
1. Follow the installation instructions.
2. Use the appliance
• according to its intended use
• in good condition
• with due regard to safety and risk of danger.
3. Note that the appliance is exclusively for use in the
applications detailed in these installation instruc-
tions. Any other use will not be considered to comply
with requirements and would invalidate the
warranty.
4. Please take note that any assembly, commis-
sioning, servicing and adjustment work may only be
carried out by authorized persons.
5. Immediately rectify any malfunctions which may
influence safety.
2. Functional description
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 taken as 0.6 bar minimum.
3. Application
The membrane safety valve is only suitable to drain
drinking water from closed hot drinking water systems
according to DIN 1988 and DIN 4753-1 for protection
against exceeding pressure
Medium
Water
MU1H-1367GE23 R0609
GB
4. Technical data
Installation positionHorizontal with safety cap pointing
up
Opening pressure Factory preset to 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 tempe-
Max. 95 °C
rature
Connection size
Internal thread on inlet
Internal thread on outlet
1"
Valve size is defined by the size of
the inlet connection
5. Options
OS.-No.
Set pres-
sure
SM150- 1/2ZA 6.0 bar Rp
SM150- 1/2ZB 8.0 bar Rp
SM150- 1/2ZC 10.0 bar Rp
SM150- 1/2A 6.0 bar Rp
SM150- 1/2B 8.0 bar Rp
SM150- 1/2C 10.0 bar Rp
SM150- 3/4ZA 6.0 bar Rp
SM150- 3/4ZB 8.0 bar Rp
SM150- 3/4ZC 10.0 bar Rp
SM150- 3/4A 6.0 bar Rp
SM150- 3/4B 8.0 bar Rp
SM150- 3/4C 10.0 bar Rp
6. Scope of delivery
The safety valve comprises:
• Angled housing
• Adjustment spring
• Diaphragm
• Security cap with part label
6
/
",
/
1
3
2
4
/
",
/
1
3
2
Connection
Connection
size Inlet
size Outlet
/
" IG
Rp
/
" IG
1
1
2
2
/
" IG
Rp
/
" IG
1
1
2
2
/
" IG
Rp
/
" IG
1
1
2
2
/
" IG
Rp
/
" IG
1
3
2
4
/
" IG
Rp
/
" IG
1
3
2
4
/
" IG
Rp
/
" IG
1
3
2
4
/
" IG
Rp
/
" IG
3
3
4
4
/
" IG
Rp
/
" IG
3
3
4
4
/
" IG
Rp
/
" IG
3
3
4
4
/
" IG
Rp1" IG
3
4
/
" IG
Rp1" IG
3
4
/
" IG
Rp1" IG
3
4
Honeywell GmbH
",
",
4
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