Civacon MaxAir HP 5 in. x 4 in. Flanged Elbow Crude Oil Emergency Valve w/ Viton Seal

4 in.
Product Type:
Air Operated Flanged Elbow
12.00 LBS
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Civacon's MaxAir? HP 5""x 4"" Air Operated Emergency Valve is suitable for both petroleum and crude applications. The MaxAir? HP Series valves are uniquely engineered with no moving parts in the flow path for a superior flow rate. Also designed with an independent external exhaust, which isolates the valve exhaust from the rest of the system. This valve is compatible with diesel, biodiesel, gasoline, ethanol and methanol. The Viton GFLT seal provides ultimate product compatibility.

This valve features an integrated air inlet that allows the unit to close if it becomes sheared in the result of an accident. It incorporates a frangible shear groove per 49CFR178.345-8 tested per TTMA RP 84. A factory installed fusible plug that will melt at a temperature of 212° F(100° C) allowing the valve to deplete air pressure. Also included is a mechanical jack screw for manual operation in the event of air pressure loss.

The MaxAir? HP High Performance Emergency Valve conforms with API 1004 and EN 13083 standards.


  • Designed for crude and petroleum applications
  • No moving parts in flow path for superior flow rates and faster drops
  • Independent external exhaust
  • Viton GFLT Seal for superior compatibility
  • Mechanical jack screw allows product to be off-loaded in the event of air pressure loss
  • Meets API 1004 and EN 13083 standards
  • Compatible with 4" TTMA sumps
  • Compatible with diesel, biodiesel, gasoline, ethanol and methanol
  • Hard coat anodized aluminum and stainless steel components
  • Available in a variety of configurations
  • Operating Pressure Crude: Minimum 70 psi (4.83 bar) line pressure
  • Operating Pressure Petroleum: Minimum 30 psi (2.06 bar) line pressure


Product Manual (PDF Download)