This explosion-isolation flap is now available in stainless steel
The DFI explosion-isolation flap valve (photo) is safe for use within food production and chemical plants to protect against rust, paint or other contaminants from entering the product. Currently available in sizes from 4 to 32 in., the DFI is also now available in 40 in. (DN1000) for the traditional version. This allows DFI to be used in even larger dust collectors or other industrial applications that convey organic dust. DFI includes two flaps on a vertical center-bar hinge that are held open by normal process flow. When a deflagration occurs, the pressure reverses the flow and quickly closes the lightweight flaps into a locked position strong enough to withstand the explosion pressure. The compact, fast-closing flaps allow installation close to the vessel and elbows in both horizontal and vertical ducts, depending on DFI size. The device withstands high explosion pressures up to 1.5 barg from ST1, ST2, light metal and low-MIE (minimum ignition energy) dusts. By simulating real-world conditions, it will experience in the field, the DFI exceeds testing standard EN16447. Hall 1, Stand 236 — Fike Deutschland, Weinheim, Germany