IEP Technologies
Explosion-isolation flap valves provide explosion protection
The self-actuating IFV and IFV-M Isolation Flap Valves (photo) mitigate the risk of fire and dust explosions, keeping flames and explosions from propagating to upstream equipment linked by ductwork. An isolation flap valve installed in the duct is closed rapidly by the pressure wave from the downstream explosion, ahead of the flame-front arrival. By stopping the flame from reaching the upstream vessel, it prevents the flame and explosion pressure from reaching attached vessels and creating a secondary and often more energetic explosion, says the manufacturer. The IFV-M model adds integrated monitoring of the flap position and dust accumulation in the valve body, meeting the requirements of the OSHA Combustible Dust Directive, NFPA 654 and NFPA 69. These valves are available in a variety of sizes for dust class ST1 and ST2. — IEP Technologies, part of Hoerbiger Wien GmbH, Vienna, Va.