Cleanroom Air Showers

The Construction of our Air Showers are conducted to ensure that all exterior and interior surfaces are completely sealed with materials compatible with class 1/10 Cleanroom construction standards. All visible surfaces are covered with high-pressure, white plastic laminate. Trim is constructed of clear, anodized aluminum. All interior duct surfaces are completely covered with plastic laminate, melamine laminate, clear anodized aluminum, or other suitable surface coverings compatible with class 1/10 Cleanroom construction standards. Doors are also made from clean, anodized aluminum and 1/4" tempered glass used at the entry and exit of the Air Shower. Heavy duty commercial door closers, door seals, and door sweeps are used to maintain the seal of the Cleanroom envelope. Adjustable air nozzles are constructed from white plastic. They are sized and spaced to provide on average 7,000 fpm air flow at the face of the nozzle. Return air registers are of white baked enamel steel grilles, built into the Air Shower wall system. Interior ceilings include an appropriate number of air nozzles and a fluorescent light, or, HEPA filters and lighting above a protective grille (on models with laminar flow ceilings). Also provided are predrilled and capped sprinkler penetrations.

The Filtration System is comprised of HEPA filters capable of removing 99.99% of dust particles to 0.3 microns in size. Filter access is from above unit, or as specified. Air Showers which are specified to include optional Constant Purge ceilings have fan powered HEPA filters mounted above a polystyrene eggcrate diffuser panel. The Constant Purge feature will add 6" to the standard Air Shower height. Replaceable pre-filters of 30% efficiency are used to maximize life of the absolute filters, and are accessible from the Air Shower interior, within return air grille(s).

The Air Shower Electrical System is comprised of a prewired electrical panel which contains the major electrical components, such as: rotary disconnect switch, transformers, fuses, motor starter, overload, terminal strips, ground bus, and programmable logic controller. Further included is a single-point connection of 208/220 volt/3 wire service or 460 volt/3 wire service which serves as the only source of power required by the buyer, as well as a paddle-wheel type high pressure blower, sized to provide 7,000 fpm velocity at the face of the air nozzles. A rotation indicator is permanently attached to the blower housing. All lighting is 115 volts, and all wiring methods comply with the National Electrical Code.

For the Control System, a Programmable Logic Controller (PLC) is used to control the sequence of operation of the Air Shower. An Emergency Off Button (EMO) located inside the Air Shower is mounted in a conspicuous location. Activating the switch causes the cycle to immediately end, and release all interlocks. Lighting is set to remain on. Door sensors are set at 24 volt DC magnetic reed switches, and door interlocks are 24 volt, located in the door jamb at the top of the entrance and exit ways. All locks are automatically set to release upon loss of power, or when the Emergency Off Button is pressed.

All our Air Showers are Inspected prior to shipping by factory quality assurance personnel. Units are set up square and plumb on a level surface in the factory test area, and any necessary adjustments to doors and door seals will be made to project satisfaction. Sound levels, velocity, vibration, cleanliness, trueness to size, and integrity of design are checked prior to disassembly and crating. After disassembly for shipment, all components are marked clearly for field installation. A floor plan, assembly instructions, and an electrical schematic are provided for each Air Shower. As always, our professional technical assistance is only a phone call away, before or after completion of any project. Specifications are subject to change without notice.