Explosion Isolation Flap Valves

Explosion Isolation Flap Valves

Performance Features

  • Short installation distances
  • Low maintenance costs
  • Passive mode of operation
  • Reliable mechanical locking

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  • Types
  • Sizing
  • Documentation

Types

Process Equipment Protection Basis Mechanical Isolation Guidelines
Containment The mechanical isolation device applied must be designed to survive the maximum explosion pressure for the process material, Pmax. In addition, all of the piping and equipment upstream of the isolation device must also be designed to accept Pmax. This may require a design pressure as high as 230 psig (16 bar).
Venting The mechanical isolation device applied must be designed to survive the reduced explosion pressure of a vented deflagration, Pred. In addition, all of the piping and equipment upstream of the isolation device must also be designed to accept Pred. This will typically require a design pressure as low as 3 psig (0.2 bar).
Suppression The mechanical isolation device applied must be designed to survive the reduced explosion pressure of a suppressed deflagratlon, Pred. In addition, all of the piping and equipment upstream of the isolation device must also be designed to accept Pred. This will typically require a design pressure as low as 2 or 3 psig (0.14 or 2 bar).

Sizing

Normal Size Low Pressure Isolation Valve High Pressure Isolation Valve
in mm lbs Kg lbs Kg
4 100 57 26 150 69
6 150 96 44 195 89
8 200 151 69 305 140
10 250 297 136 415 190

Product Literature

Saf-t-Flap Explosion Isolation Valve
Understanding NFPA 654
Industrial Explosion Protection
OSHA Combustible Dust National Emphasis Program
The MBS Detec-Saf Alarm Systems