Disengagement box

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FEATURES:
Safety equipment for gas storage tanks. Disengagement box is designed to mount two or more safety relief valves allowing to remove one valve at a time for calibration and maintenance keeping the tank in operation. In this temporary condition the tank is protected against overpressure through the spare valve in service on the box.
The lateral pin, protected by a steel cover, moves a shutter through the internal channels driving the gas flow toward the selected valve.
The finishing is in galvanised steel.

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REFERENCE LAWS:

  • PED 97/23/CE;
  • ATEX 94/9/CE;
  • 2006/42/CE;
  • 2004/108/CE.

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MAIN COMPONENTS:

  • N.1 Body in carbon steel S355;
  • N.1 Valve selection device with AISI304 stainless steel and teflon seals;
  • Purge valves AISI304 stainless steel;
  • Buna N o-rings.

Available on request:

  • ANSI 300 flanges;
  • VITON gaskets and seals;
  • Dry-break Quick couplings;
  • Flanged connection to the truck (brass).

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TECHNICAL CHARACTERISTICS:

  • Max operating pressure (PS) : 40bar;
  • Test pressure(PT) : 57,5bar;
  • Operating temperature (TS min/max) : -10°/+50°C (carbon steel),
  • Liquid : LPG (mix Propano-Butano) and Group 1 fluids;
  • NoPED cathegory : II^ category.

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CONNECTIONS:

  • Thread for PRV valves (NPT) = 1’’ ½, 2'‘, 2’’ ½;
  • Discharge orientation= horizontal / vertical / multiple valve;
  • Tank flange connection= from DN50 to DN100.

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MAX net DISCHARGE SECTION:

  • 1’’ ½ = 15,2cm^2;
  • 2’’ = 15,9cm^2;
  • 2’’ ½ = 15,9cm^2.

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FINISHING:
Galvanised, thickness of the protection leyer from12 to 16μm.

AVAILABLE MODELS:

                                                                                                                                                

 

Tank flange connection Code Safety relief valve Discharge type Drawing Min discharge section [cm2] A B C D E
1’’ ½ SAFETY VALVES Dimensions (mm)
DN50 ( 2’’ ) Non standard (*) N.2 3133G (1½ NPT) HORIZONTAL 4251 1/A 15,2 173 327 500 205 180
DN50 ( 2’’ ) 200/055/00 N.2 3133G (1’’ ½ NPT) VERTICAL 4252 1/A 15,2 173 327 500 225 165
DN65 ( 2’’ ½ ) Non standard (*) N.2 3133G (1’’ ½ NPT) HORIZONTAL 4253 1/A 15,2 173 327 500 205 190
DN65 ( 2’’ ½ ) 200/055/03 N.2. 3133G (1’’ ½ NPT) VERTICAL 4254 1/A 15,2 173 327 500 225 185
DN80 ( 3’’ ) Non standard (*) N.2 3133G (1’’ ½ NPT) HORIZONTAL 4255 1/A 15,2 173 327 500 205 200
DN80 ( 3’’ ) 200/055/04 N.2 3133G (1’’ ½ NPT) VERTICAL 4256 1/A 15,2 173 327 500 225 200
’’ SAFETY VALVES Dimensions (mm)
DN65 ( 2’’ ½ ) 200/059/08 N.2 7534G (2 NPT) HORIZONTAL 4257 1/A 15,9 195 327 522 205 670
DN65 ( 2’’ ½ ) 200/059/02 N.2 7534G (2 NPT) VERTICAL 4258 1/A 15,9 195 327 522 705 185
DN80 ( 3’’ ) 200/059/00 N.2 7534G (2 NPT) HORIZONTAL 4259 1/A 15,9 195 327 522 205 678
DN80 ( 3’’ ) 200/059/01 N.2. 7534G (2 NPT) VERTICAL 4260 1/A 15,9 195 327 522 705 200
DN100 ( 4’’ ) Non standard (*) N.2 7534G (2 NPT) HORIZONTAL 4261 1/A 15,9 195 327 522 205 695
DN100 ( 4’’ ) 200/059/04 N.2 7534G (2 NPT) VERTICAL 4262 1/A 15,9 195 327 522 705 235
DN100 ( 4’’ ) 200/059/03 N.4 7534G (2 NPT) MULTIPLE 4270 1/A 15,9 427 854 720 / /
2’’ ½ SAFETY VALVES Dimensions (mm)
DN65 ( 2’’ ½ ) Non standard (*) N.2 3149G (2 ½ NPT) HORIZONTAL 4263 1/A 15,9 173 327 500 205 290
DN65 ( 2’’ ½ ) Non standard (*) N.2 3149G (2 ½ NPT) VERTICAL 4264 1/A 15,9 173 327 500 325 185
DN80 ( 3’’ ) Non standard (*) N.2 3149G (2 ½ NPT) HORIZONTAL 4265 1/A 15,9 173 327 500 205 297
DN80 ( 3’’ ) Non standard (*) N.2 3149G (2 ½ NPT) VERTICAL 4266 1/A 15,9 173 327 500 325 200
DN100 ( 4’’ ) Non standard (*) N.2 3149G (2 ½ NPT) HORIZONTAL 4267 1/A 15,9 173 327 500 205 315
DN100 ( 4’’ ) 200/059/05 N.2 3149G (2 ½ NPT) VERTICAL 4268 1/A 15,9 173 327 500 325 235
DN100 ( 4’’ ) Non standard (*) N.4 3149G (2 ½ NPT) MULTIPLE 4271 1/A 15,9 427 854 337 / /
Note : * Available on request


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