HL Air Curtains are for petrochemical and chemical facilities or refineries.
They prevent doorway energy losses and restrict infiltration of airborne contaminants or fumes. Air curtains are made based on explosionproof motors, spark-resistant fans, HL electrical components and construction, or other precautions required by ANSI/NFPA-70.
Standard construction complies with Class I, Div. 1 and 2, Groups C and D for gases; Class II, Div. 1 and 2, Groups F and G for dust. Optional Groups A and B construction is optionally available.
HLs are factory-assembled in single length units from 3 to 16-ft long cabinets that don't require intermediate installation supports. They feature 1/2 to 15-hp explosionproof motors plus heavy-duty blowers to protect 6 to 20-ft high doorway heights.