User guide

21-2
Safety Valves
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Safety Valves
Type SM152 diaphragm-type safety valves are used to protect pressurised water heaters according to
the requirements of DIN 4753, Part 1 and DIN 1988. 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.
Not chrome plated, set pressure 6,0 bar
Not chrome plated, set pressure 8,0 bar
Not chrome plated, set pressure 10,0 bar
Chrome plated, set pressure 6,0 bar
Chrome plated, set pressure 10,0 bar
Diaphragm safety valve for closed water heaters, SM152
Approvals TUEV approved, certified to Pressure Equipment Directive 97/23/EG,
Reference No. CE 0035
Media Water
Body material brass
Spring bonnet material synthetic material
Port connection type internal threads
Max. media temperature 95
o
C
Additional description The valve size is defined by the size of the inlet connection. For closed
water heaters in compliance with DIN 4753, Part 1 and EN 1717.
Tested to TRD 721 for pressure range 1.0 bar to 10.0 bar.
• Tested to TRD 721
• Easy venting
• Replacement insert makes servicing simple
• Standardised discharge connection
Port diameter DN size Set pressure Type
inch mm bar
1/2 15 6 SM152-1/2AA
3/4 20 6 SM152-3/4AA
125 6 SM152-1AA
1 1/4 32 6 SM152-11/4AA
Port diameter DN size Set pressure Type
inch mm bar
1/2 15 8 SM152-1/2AB
3/4 20 8 SM152-3/4AB
125 8 SM152-1AB
1 1/4 32 8 SM152-11/4AB
Port diameter DN size Set pressure Type
inch mm bar
1/21510 SM152-1/2AC
3/42010 SM152-3/4AC
12510 SM152-1AC
1 1/4 32 10 SM152-11/4AC
Port diameter DN size Set pressure Type
inch mm bar
1/2 15 6 SM152-1/2BA
Port diameter DN size Set pressure Type
inch mm bar
1/21510 SM152-1/2BC