Laboratory Ventilation Systems
16Pages

Laboratory Ventilation Systems Fume Hood Exhaust Blowers HEPA & Carbon Filtration Ducting & Exhaust Fume Scrubbers Manifolds

Fume Hood Ducting and Exhaust System Ductwork connected to fume hoods may be arranged in a variety of patterns depending on requirements. Generally, the best exhaust system involves the shortest duct length and the fewest elbows. Duct size, length, and number of elbows affect static pressure loss and blower efficiency. Ideally, each fume hood should have its own ducting and blower to maximize hood flexibility and reduce danger of backdraft from other hoods. Common or manifold ductwork designs can be used, provided duct and blower have been sized properly. In these designs, individual hood...

Fume Hood Ductwork & Venting Accessories Ducting and accessories are chemical resistant and easy to install. Flexible and Rigid PVC Ducting 1. Flexible Ducting neoprene impregnated fiberglass reinforced with steel helix wire. Standard 12’ lengths. Each piece includes 2 clamps. 2. PVC Rigid Ducting chemical resistant for permanent installations. Standard 10’ lengths with straight ends. 3. PVC Coupling required to connect straight sections. 11. PVC Vent Outlet for horizontal venting through wall or window. Angled end prevents rain from entering. Male connector included. 12. Zero Pressure...

Fume Hood Exhaust Blowers Ordering Info Blower Description: UniFlow CE Fume Hoods Hood Width Hood Depth • Housing is constructed of heavy gauged galvanized steel, with a baked enamel finish, to resist weather & chemical exposures. • Flange inlet collars enable easy connection to ductwork. • Wheel is dynamically balanced to minimize noise and increase efficiency. • Ball bearing pillow blocks are pre-lubricated and resistant to both moisture and dirt. UniFlow SE & LE Fume Hoods • Motors meet NEMA standards for single speed motors. • These blowers are ideally suited for both supply and exhaust...

Fume Hood Exhaust Blowers Ordering Info A complete line of belt and direct drive exhaust blowers that are chemical resistant & available in standard and explosion-proof models. HEMCO blowers are designed to operate effectively and efficiently to remove noxious & hazardous fumes. Standard 115V 60Hz & international electrical configuration of 220V 50Hz AC available. Epoxy Coated Steel Blower Belt Drive Standard (STD) belt drive steel blower and impeller wheel are epoxy coated for superior chemical resistance. Explosion-proof blowers (EXP) have epoxy coated, non-sparking aluminum impeller wheel....

Sizing Fume Hood Exhaust Blowers Selecting a Blower: 1. Using the sizing instructions select the size blower required form the CFM static pressure charts. 2. When spark resistance is required, specify the explosion proof blower catalog number. 3. When selecting a blower to suite the operating condition,please specify the operating voltage & phase. 4. All blowers have a coated impeller wheel, the frame and housing have a baked chemical resistant, synthetic resin finish. 5. If specified a chemical resistant resin finish can be applied to the blower housing for maximum chemical resistance. 6....

Fume Hood Exhaust Blowers Static Pressure Info Table 2. Static Pressure loss per 100 ft straight run of duct by fitting diameter Table 3. Static Pressure loss per 90 degree elbow by fitting diameter cfm Table 4. Static Pressure loss per “WYE” by fitting diameter 18” Color Code Blue = Increased Noise Level Color Code Yellow = Normal Noise Level •The static pressure loss for 49 degree elbows is equal to 1/2 of the ratings for 90 degree elbows. UNIFLOW PERCHLORIC ACID FUME HOODS EXHAUST ORDERING DESCRIPTIONS 1. Blowers are constructed of fluoropolymer coated steel, are belt driven, include TEFC...

Clean Aire Carbon Filtration Systems HEMCO carbon filter paks are used in laboratory exhaust and supply systems to remove chemical odors and vapors from the airstream. Filters are loaded with virgin coconut activated carbon to efficiently absorb organic solvents and acid fumes. The filter pak housing features a hinged access door with gaskets and spring latches for convenient filter changes. Inlet and outlet plenums with duct connection collars are installed. The carbon filter pak can also be paired with a HEPA filter pak to collect particulate contaminants. Note: A standard “01” activated carbon...

Clean Aire HEPA Filtration Systems HEMCO HEPA filter paks effectively collect particulate contaminants from the exhaust air stream. HEPA filters are 99.999% effective at removing particulate .3 micron and larger. The filter pak housing features a hinged access door with gaskets and spring latches for convenient filter change. Inlet and outlet plenums with duct connection collars are installed. The HEPA filter pak can also be paired with a carbon filter pak to remove chemical fumes and odors. Note: HEMCO recommends a minihelic or magnehelic gauge to monitor the airflow differential across the...

Fume Hood Exhaust System Diagrams UniFlow SE Aire Stream, LE, CE, Fume Hood Diagram • Standard composite fiberglass fume hood for acids or solvent fumes Exhaust Blower Auxiliary Air Fume Hood Diagram • Standard composite fiberglass fume hood with supply air plenum Supply Blower Exhaust Blower • Designed to makeup 50% of exhaust volume • Typical exhaust blower is epoxy coated steel • When sash is up, air enters sash opening. When sash is down air enters through upper and lower bypass • Roof mount location is recommended • Ducting can be PVC, galvanized steel, or stainless steel • It may be...

Laboratory Ventilation Systems Designed to offer the complete solution to laboratory ventilation concerns. Integrated components, blowers, fume scrubbers, and ducting are engineered together to provide a safe, effective, and efficient fume hood ventilation system. VAV controllers minimize the amount of conditioned air that is exhausted through the fume hood. Fume hood Carbon/HEPA filter module page 11 Fume hood scrubber page 14 Belt driven tubular centrifugal fan to safely propel fumes away from the building. Fume hood Supply air enters Lab supply air is engineered to meet designed air...