The Civacon MaxAir™ II 5x4 Air Operated Emergency Valve is an optimal choice
for petroleum applications. The MaxAir™ II series valves are uniquely engineered
with no moving parts in the flow path for a superior flow rate.
Civacon's 5x4 MaxAir™ II Emergency Valve is 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
products. The Viton GFLT and Teflon encapsulated seals provide ultimate product
It 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 49CFR178.345-5 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.
Operating Pressure Requirements: Minimum of 40 psi (4.83 bar)
operating line pressure.