Air Make Up Units for Rail Car Paint Booths
Rail car paint booths exhaust a large volume of air, so replacement air has to be planned with booth balance, coating quality, temperature, and building pressure in mind. Double D Mechanical installs, relocates, and services air make up units, ductwork, controls, heaters, and related connections for rail finishing systems.
Discuss your installationBalancing Booth Exhaust Volume
The make-up air unit should be reviewed with the booth exhaust fans, filter condition, door openings, and building pressure. When replacement air is poorly placed or undersized for the operating condition, drafts, door pull, overspray movement, and temperature swings can affect production.
Discharge Locations Near Long Cars
Air delivery should support the spray zone without blowing directly across wet surfaces or pushing contamination from adjacent areas. Rail car length, roof access, painter position, and booth plenum arrangement all influence where duct drops, diffusers, or supply plenums should be placed.
Heat, Fuel, and Control Integration
Air make up units may involve gas or electric heat, dampers, control panels, safeties, and coordination with exhaust fan operation. Utility routing should leave burners, filters, motors, belts, dampers, and control components reachable for service.
Outdoor Placement and Duct Routing
Unit location affects structural support, roof curbs, wall openings, weather exposure, service platforms, crane clearance, and the route back to the booth. Ductwork should be laid out to reduce avoidable restrictions while preserving access to other rooftop or plant equipment.
Inputs for Sizing Discussions
Useful information includes booth dimensions, exhaust fan data, desired operating modes, coating process notes, temperature needs, fuel and electrical availability, building pressure concerns, and photos of potential unit locations.
Frequently asked questions
Why does a rail car booth need make-up air?
The booth exhaust system removes a large amount of air, and make-up air replaces it so the booth and surrounding building can operate with better balance.
Can make-up air affect finish quality?
Yes. Poor discharge placement or temperature control can create drafts, uneven conditions, or contamination paths near wet coating.
What should be coordinated with the exhaust fans?
Fan operation, control sequences, dampers, heater operation, pressure relationships, and shutdown functions should be reviewed together.
Where can the unit be installed?
Placement depends on available roof or ground space, structural support, duct routing, weather access, service clearance, and utility connections.
What should be checked during service?
Filters, belts, motors, dampers, burners or heating elements, controls, duct connections, and access panels should be checked.