OC Oval – Critical Grade Series

Typical Attenuation – 28 to 36 DB(A)

Connection sizes are nominal. Dimensions are in inches. Weights are in pounds, depend on selected options, and are approximate.


  • Bottom, top, and no mounting lug options (f).
  • Carbon steel or 304 stainless steel construction (m).
  • Carbon steel housings coated with satin black paint rated to 1200°F
  • Connections: 125/150# ANSI bolt pattern flanges


  • Side outlet (d) orientation.
  • Bottom inlet and top outlet “F” dimensions (n).
  • Inlet size and connection type (i/j) and outlet connection type (p).
  • Dual inlet (h/n).
  • Flush mount inlet (j).
  • See EM Silencers Part Number Legends (p.6); dual inlet and “F” dimension options require a part number from MIRATECH.


  • Custom configurations, materials, connections, overall dimensions, etc.
  • Part numbers will be confirmed upon receipt or project desing requirements, specifications, or order.