DUNGS SAV - Slam Shut Valves DN 25-DN 50

[{"filename":"sav-dn25-dn50_datasheet_en_279849.pdf","text":"SAV\nSafety Shut-off Valve\n\n\n\n Safety Shut-off Valve Type SAV\n\n Direct acting shut-off device with\n adjustable setpoint springs for over-pressure and\n under-pressure monitoring\n\n In compliance with EN 14382\n\n\n\n • Inlet pressures up to 20 bar (2 000 kPa)\n • High flow rat\n • Manual reset\n • External impulse\n • Maintenance-friendly\n • Flange connection DN 25 - DN 50\n • Threaded connection Rp 1\" - Rp 2\"\n\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 1 ... 19\n\fTable of contents SAV\n\n Application\t\t\t\t\t\t 3\n\n Approval\t\t\t\t\t\t 3\n\n Technical data\t\t\t\t\t\t 4\n\n Pressure taps\t\t\t\t\t\t 5\n\n Nomenclature\t\t\t\t\t\t 6\n\n Adjustment ranges SAV flanged\t\t\t\t 7\n\n Adjustment ranges SAV threaded\t\t\t 8\t\t\n Selection of SAV springs \t\t\t 9\n Installation dimensions SAV flanged\t\t\t 10\n\n Installation dimensions SAV threaded\t\t\t 11\n Function\t\t\t\t\t\t 12\n\n Sectional drawing SAV\t\t\t\t\t 12\n\n Device selection / flow diagram\t\t\t\t 13 - 17\n\n Calculation of gas types\t\t\t\t\t 18\n \t\t\t\n Contact details\t\t\t\t\t\t 19\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 2 ... 19\n\fSAV Application Approval\nSpring-loaded, shut-off valve with Safety valve closes when over and\nadjustable setpoint springs for EC type testing certificate as per:\n under pressures occurs in industrial\nlimitation of the upper and lower gas burners and gas heating appli-\npressure downstream. External ances. Also for installation in the mu- • EC-Pressure Equipment Directive\nimpulse of the valve downstream nicipal and commercial gas supply.\npressure.\n Suitable for gases of gas families\n 1, 2, 3 and other neutral gases.\n\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 3 ... 19\n\fTechnical Data SAV\n\n Safety shut-off valve in compliance with EN14382\n Type SAV 100... IS (integral strength range) /\n SAV 250... DS (differential strength range)\n\n Type of gas Family 1+2+3\n\n Nominal diameters Connecting flange PN 25 according to EN1092-1or ANSI 150 lbs (B16.5)\n Flanges DN 25 40 50\n\n Nominal diameters threaded Connecting thread Rp (EN 10226-1) or NPT (B1.20.1)\n Rp/NPT 1\" 1 1/2\" 2\"\n\n Max. inlet pressure SAV 100... 10 bar (1 000 kPa) / SAV 250... 20 bar (2 000 kPa)*\n\n Response time <2s\n\n Lower adjustment range Wdu 10 mbar up to 3 000 mbar (1-300 kPa)\n\n Upper adjustment range Wdo 60 mbar up to 5 000 mbar (6-500 kPa)\n\n Materials Main body housing: cast iron GJS 400-15 (GJS 400-18 on request)\n Diaphragm housing: aluminium (steel on request)\n Diaphragms:\t\t NBR\n\n Ambient temperature -20 °C to +60 °C\n\n\n\n *19 bar (1900 kPa) with ANSI 150 flanges\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 4 ... 19\n\fPressure taps\n\n\n 1 External impulse line connection of the\n SAV, Ermeto screw connection\n GE 12- ¼ for tubes 12 x 1.5\n\n 2 Vent line connection of the SAV,\n G ¼ ISO 228\n\n\n\n\n 1\n\n\n 2\n\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 5 ... 19\n\fNomenclature\n\n\n Example SAV 100025 ND SAV 100 025 ND ANSI\n\n\n Type Safety shut-off valve\n\n\n MOP 100 … 10 000 mbar (1 000 kPa)\n 250 … 20 000 mbar (2 000 kPa)\n\n\n Nominal diameter 10 1”\n 15 11/2”\n 20 2”\n 025 DN 25\n 040 DN 40\n 050 DN 50\n\n\n Pressure ranges ND-MD Low and medium pressure\n HD-UHD High and ultra high pressure\n\n\n Thread / flange type with Standard PN 25 flanges or thread Rp\n ANSI with ANSI 150 lbs\n NPT with NPT threads\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 6 ... 19\n\fAdjustment ranges SAV flanged\n\n\n Type Connection Version Order Lower switch- Upper switch-\n number ing point ing point\n\n Wdu Wdo\n SAV 100025 ND-MD DN 25 ND-MD 270291 10-500 mbar 60-999 mbar\n SAV 250025 HD-UHD DN 25 HD-UHD 271122 150-3 000 mbar 600-5 000 mbar\n SAV 100040 ND-MD DN 40 ND-MD 270294 10-500 mbar 60-999 mbar\n SAV 250040 HD-UHD DN 40 HD-UHD 271123 150-3 000 mbar 600-5 000 mbar\n SAV 100050 ND-MD DN 50 ND-MD 270297 10-500 mbar 60-999 mbar\n SAV 250050 HD-UHD DN 50 HD-UHD 271124 150-3 000 mbar 600-5 000 mbar\n SAV 100025 ND-MD ANSI NPS 1” ND-MD 277799 10-500 mbar 60-999 mbar\n SAV 250025 HD-UHD ANSI NPS 1” HD-UHD 275186 150-3 000 mbar 600-5 000 mbar\n SAV 100040 ND-MD ANSI NPS 11/2” ND-MD 277802 10-500 mbar 60-999 mbar\n SAV 250040 HD-UHD ANSI NPS 11/2” HD-UHD 275184 150-3 000 mbar 600-5000 mbar\n SAV 100050 ND-MD ANSI NPS 2” ND-MD 277805 10-500 mbar 60-999 mbar\n SAV 250050 HD-UHD ANSI NPS 2” HD-UHD 273855 150-3 000 mbar 600-5 000 mbar\n\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 7 ... 19\n\fAdjustment ranges SAV threaded\n\n\n Type Connection Version Order Lower switch- Upper switch-\n number ing point ing point\n Wdu Wdo\n SAV 10010 ND-MD Rp 1” ND-MD 287908 10-500 mbar 60-999 mbar\n SAV 10010 HD-UHD Rp 1” HD-UHD 287909 150-3 000 mbar 600-5 000 mbar\n SAV 10015 ND-MD Rp 11/2” ND-MD 287911 10-500 mbar 60-999 mbar\n SAV 10015 HD-UHD Rp 11/2” HD-UHD 287912 150-3 000 mbar 600-5 000 mbar\n SAV 10020 ND-MD Rp 2” ND-MD 287914 10-500 mbar 60-999 mbar\n SAV 10020 HD-UHD Rp 2” HD-UHD 287915 150-3 000 mbar 600-5 000 mbar\n SAV 10010 ND-MD NPT NPT 1” ND-MD 287917 10-500 mbar 60-999 mbar\n SAV 10010 HD-UHD NPT NPT 1” HD-UHD 287918 150-3 000 mbar 600-5 000 mbar\n SAV 10015 ND-MD NPT NPT 1.1/2” ND-MD 287920 10-500 mbar 60-999 mbar\n SAV 10015 HD-UHD NPT NPT 1.1/2” HD-UHD 287921 150-3 000 mbar 600-5000 mbar\n SAV 10020 ND-MD NPT NPT 2” ND-MD 287923 10-500 mbar 60-999 mbar\n SAV 10020 HD-UHD NPT NPT 2” HD-UHD 287924 150-3 000 mbar 600-5 000 mbar\n\n\n\n\nSAV Ÿ Edition 03.2026 Ÿ 279 849 8 ... 19\n\fSelection of SAV springs\n\nThe response pressure results from\nthe force of the installed adjusting Specific adjustment range, underpressure Wdsu\nspring. The upper response pres-\n Spring Order Wire diameter Length Diameter…