LABORATORY CABINETRY AND SPECIALTIES: FUME HOODS

Transcription

1 Laboratory Cabinetry and Specialties: Fume Hoods LABORATORY CABINETRY AND SPECIALTIES: FUME HOODS

2 Laboratory Cabinetry and Specialties Fume Hoods.2

3 Laboratory Cabinetry and Specialties Table of Contents Specifications Fume Hood Series High Performance/Low Velocity Hood Airfoil-Type Hood Airfoil-Type Double-Faced Demo Hood Bench-Type Slim Line Hood Student Work Station ADA Design Airfoil-Type Hood Radio Isotope Hood Perchloric Acid Hood Portable Fume Hoods Canopy Fume Hoods Options Ceiling Enclosures...24 Lattice Assembly...24 Airflow Monitor...25 Base Cabinets Local Extractors Technical Description...27 Table Mount...27 Wall Mount...28 Ceiling Mount...29 Hoods...30 Accessories Stevens Industries, Inc. Due to continuing product development, Stevens reserves the right to change specifications without notice. Fume Hoods.3

4 Specifications PART 1 GENERAL 1.01 GENERAL DESIGN REQUIREMENTS A. Fume hoods shall function as ventilated, enclosed workspaces, designed to capture, confine, and exhaust fumes, vapors and particulate matter produced or generated within the enclosure. B. Design fume hoods for consistent and safe air flow through the hood face. Negative variations of face velocity shall not exceed 20% of the average face velocity at any designated measuring point as defined in this section. C. Average illumination of work area: Minimum 80 foot-candles. Work area shall be defined as the area inside the superstructure from side to side and from face of baffle to the inside face of the sash, and from the working surface to a height of 28 inches. D. Fume hood shall be designed to minimize static pressure loss with adequate slot area and stainless steel exhaust collar configuration. Maximum average static pressure loss readings taken three diameters above the hood outlet from four points, 90 degrees apart, shall not exceed the following maximums (typical sash height at 30"): Face Velocity Measured S.P.L. (W.G.) 75 F.P.M..18 inches 100 F.P.M..30 inches 125 F.P.M..45 inches 150 F.P.M..60 inches PART 2 MATERIALS AND CONSTRUCTION 2.01 FUME HOOD MATERIALS A. Steel: High quality, cold rolled, mild steel meeting requirements of ASTM A366; gauges U.S. Standard. B. Stainless Steel: Type 304; gauges U.S. Standard. C. Ceiling Closure Panels: Minimum 18-gauge; finish to match hood exterior. D. Bypass Grilles: Low resistant type, 18-gauge steel, upward directional louvers. E. Safety Glass: 7/32" thick laminated safety glass. F. Sash Cables: 7 x 7 steel, coated, 1/16" diameter coated to 3/32". (Military spec. quality) G. Sash Guides: Full length extruded corrosion resistant polyvinyl chloride or powder coated steel with PVC guides to protect against metal to metal contact. H. Pulley Assembly for Sash Cable: 2" diameter, nylon tired, ball bearing type with cable retaining device. I. Sash Pull: Full width 16-gauge steel to match hood color. J. Interior Access Panels: To be made of the same material as the fume hood liner. Panels are to be held in place by means of a non-mechanical type fastening system. K. Fastenings: 1. Exterior structural members attachments: Sheet metal screws, zinc plated. 2. Interior fastening devices concealed. Exposed screws not acceptable. 3. Exterior panel member fastening devices to be corrosion resistant non-metallic material. Exposed screws not acceptable FUME HOOD CONSTRUCTION A. Superstructure: Rigid, self-supporting assembly of double wall construction, maximum 5-1/4" thick. 1. Wall consists of a sheet steel outer shell and a corrosion resistant inner liner, and houses remote operating service fixture mechanisms and electrical devices. Fume Hoods.4

5 Specifications 2. Access to fixture valves concealed in wall provided by exterior removable access panels, access panels on the inside liner walls, or through removable front posts. 3. Hoods must be of full frame construction. Hoods that use metal brackets and spacers to hold interior and exterior panels in place are unacceptable. B. Exhaust Outlet: 10" round, 20-gauge stainless steel exhaust collars. C. Access Opening Perimeter: Top and sides of face opening to be radiused or angled. D. Bottom Horizontal: Foil shall be flush mount type and provide a 1" bypass to ensure a clean sweep and to minimize eddies along the work surface when sash is in the closed position. E. Sash Design: 1. Bottom sash rail: 1-1/2" frame section, 16-gauge steel, PVC, or stainless steel. Provide flush pull, full width of bottom rail. 2. Safety glass: Set into rails in deep form extruded polyvinyl chloride or neoprene glazing channels. 3. Counter balance system: Single weight, pulley, cable, counter balance system which prevents sash tilting by means of a "shaft driven" system and permits one finger operation at any point along full width. Sash not using this type of counter balance system is unacceptable. Maximum 9 pounds pull required to raise or lower sash throughout its full length of travel. Design system to hold sash at any position without creep and to prevent sash drop in the event of cable failure. 4. Open and close rubber bumper sash stops. F. Fume Hood Liner: Polyresin (reinforced polyester panel) smooth finish and white color in final appearance. Flexural strength: 14,000 psi. Flame spread: 15 or less per U.L.723 and ASTM E G. Baffles: Fabricate "fixed" baffles providing controlled air vectors into and through the fume hood of the same material as the liner. Hoods with adjustable baffles are unacceptable. All baffle support brackets to be non-metallic. H. Service Fixtures and Fittings: Color coded hose nozzle outlets and valves mounted inside the fume hood and controlled from the exterior with color coded index handles. 1. Valves: Needlepoint type with self-centering cone tip and seat of hardened stainless steel. 2. Provide pre-piping for all service fixtures from valve to common point for final connection by respective trades. Copper for water, air and vacuum, and black iron for gas services. 3. Fixtures exposed to hood interior: Brass with chemically resistant powder coating. 4. Remote control handles: Prong type, easy to grasp. I. Hood Light Fixtures: Two lamp, rapid start, T-8 U.L. Listed fluorescent light fixtures with sound rated ballast installed on top panel. 1. Interior of fixture: White, high reflecting plastic enamel. 2. Removable safety glass panel on interior of hood for re-lamping of lights. 3. Size of fixture: Largest possible up to 48" for hoods with superstructures up to six feet. 4. Includes lamps with fixtures. J. Electrical Services: Three wire grounding type receptacles rated at 120V G.F.I., 20 amperes. Flush Plates: Black acid resistant thermoplastic. Fume Hoods.5

6 51000 Series High Performance/Low Velocity Hood The SERIES hood is designed to create a safe work environment with a savings in operating cost without compromising containment. By operating at 60 F.P.M., air flow across the sash opening results in a 40% reduction in CFM resulting in savings in the cost of fume hood operation. The Series hood has been engineered to adhere to the standards of today's most rigorous testing procedures. Standard Features: Options: U.L Classified Shown with: Airflow Monitor and External Vacuum Breaker Options Special applications and other options available upon request. Fume Hoods.6

7 51000 Series High Performance/Low Velocity Hood Superstructure: Worktop: Hood Opening: Exhaust Parameters: 460 CFM.25 SP 200 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 600 CFM.34 SP 225 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 750 CFM.34 SP 270 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1010 CFM.34 SP 300 pounds (approx.) 96" hood includes cold water faucet, gas fixture, and cup sink on both left and right hand sides. Fume Hoods.7

8 51100 Series Airfoil-Type Hood The SERIES hood is an airfoil-type hood with a 45-degree angle around the fascia and a flush mount radius airfoil across the bottom. The result is minimized turbulence with increased performance. The superstructure is designed to remove fumes, both those heavier and lighter than air. Baffle positions are fixed for both safety and consistent and complete containment of fumes at all sash positions. The interior of the hood is lined with a U.L.-certified Polyresin board. The exterior is fabricated of cold rolled steel and finished with acid wash and powder coat. The solid frame galvanized steel construction provides both stability and convenient knock-down ability to improve flexibility. Posts are 5" (127mm) wide. Standard Features: Options: U.L Classified Shown with: Airflow Monitor and External Vacuum Breaker Options Special applications and other options available upon request. Fume Hoods.8

9 51100 Series Airfoil-Type Hood Superstructure: Worktop: Hood Opening: Exhaust Parameters: 791 CFM.25 SP 200 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1095 CFM.34 SP 225 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1360 CFM.34 SP 270 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1880 CFM.40 SP 300 pounds (approx.) 96" hood includes cold water faucet, gas fixture, and cup sink on both left and right hand sides. Fume Hoods.9

10 51200 Series Airfoil-Type Double-Faced Demo Hood The SERIES hood features the same aerodynamic design as found in the Series, but with entrance from two sides. This provides an educational viewing hood that is commonly used in classroom/classroom or classroom/prep room situations, or whenever demonstration of experiments is desired. All remote controls (electrical and plumbing) are configured to the "instructor" side. The superstructure is designed to remove fumes, both those heavier and lighter than air. The interior of the hood is lined with a U.L.-certified Polyresin board. The exterior is fabricated of cold rolled steel and finished with acid wash and powder coat. The solid frame galvanized steel construction provides both stability and knock-down ability to improve flexibility. Posts are 5" (127mm) wide. Standard Features: Options: U.L Classified Shown with: Airflow Monitor and External Vacuum Breaker Options Special applications and other options available upon request. Fume Hoods.10

11 51200 Series Airfoil-Type Double-Faced Demo Hood Superstructure: Worktop: Hood Opening: Exhaust Parameters: 790 CFM.33 SP (one sash open, one closed) 200 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1095 CFM.34 SP (one sash open, one closed) 225 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1360 CFM.34 SP (one sash open, one closed) 270 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1880 CFM.40 SP (one sash open, one closed) 300 pounds (approx.) 96" hood includes cold water faucet, gas fixture, and cup sink on both left and right hand sides. Fume Hoods.11

12 51300 Series Bench-Type Slim Line Hood The SERIES hood is a thin wall hood with slimmer front posts to expand workspace. The superstructure is designed to remove fumes, both those heavier and lighter than air. Baffle positions are fixed for both safety and consistent, complete containment of fumes at all sash positions. The interior of the hood is lined with a U.L.-certified Polyresin board. The exterior is fabricated of cold rolled steel and finished with acid wash and powder coat epoxy paint. The hood is good value for those occasional use installations. Its narrow profile allows for use on standard 30" deep epoxy tops and fits through typical standard doorways. Standard Features: U.L Classified Options: Gooseneck, and Double Gas Fixtures Base Front Special applications and other options available upon request. Fume Hoods.12

13 51300 Series Bench-Type Slim Line Hood Superstructure: Worktop: Hood Opening: Exhaust Parameters: 920 CFM.25 SP 175 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1170 CFM.39 SP 200 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1420 CFM.37 SP 250 pounds (approx.) Fume Hoods.13

14 51400 Series Student Work Station The SERIES hood is the latest in fume hood design. The slope back front operator face and safety glass side ports allow open end viewing. The back is lined with a Polyresin board, making it ideal for applications against a back wall or island and peninsula settings of back-to-back unit arrangements. Utilizing models with the full-view safety glass back panel option allows 4-sided visibility. These units are especially suited for walkaround island applications. The rear post width allows units to be built within wall structures, with the viewing back side visible to the classroom and the side ports and slope front side contained within a safe zone "prep room arrangement." The superstructure is designed to remove fumes, both those heavier and lighter than air. The structure exterior is fabricated of cold rolled steel and finished with acid wash and powder coat epoxy paint. Framing is galvanized steel construction with U.L.-certified Polyresin board liner material. Standard Features: and Gas Fixture mounted in fume hood base front. 60" U.L Classified 2-TUBE VAPOR SEALED 24"-FLUORESCENT LIGHT 24" 27" 16" Shown with: Full-View Safety Glass Back Panel Option 2 1/2" 52" Options: 36" LOWER HORIZONTAL EXHAUST PLENUM Special applications and other options available upon request. 1 1/4" TROUGH/AIRFOIL STAINLESS STEEL 3 3/8" 29" 32 3/8" Fume Hoods.14

15 51400 Series Student Work Station Superstructure: Worktop: Hood Opening: Exhaust Parameters: 770 CFM.25 SP 400 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1000 CFM.33 SP 480 pounds (approx.) Superstructure: Worktop: Hood Opening: Exhaust Parameters: 1250 CFM.50 SP 560 pounds (approx.) With Standard Polyresin Back Panel Back-to-Back Island or Peninsula With Full-View Safety Glass Back Panel Option Island or Peninsula 3-Sided Viewing Back Wall 3-Sided Viewing, Each Unit 4-Sided Viewing Instructor/ Prep Room Side Classroom Side Wall Fume Hoods.15

16 51500 Series ADA Design Airfoil-Type Hood The SERIES hood is an airfoil-type hood designed to meet ADA dimensional guidelines. The superstructure is designed to remove fumes, both those heavier and lighter than air. Baffle positions are fixed for both safety and consistent, complete containment of fumes at all sash positions. The interior of the hood is lined with a U.L.-certified Polyresin board. The exterior is fabricated of cold rolled steel and finished with acid wash and powder coat epoxy paint. The solid frame galvanized steel construction provides both stability and convenient knock-down ability to improve flexibility. Posts are 5" (127mm) wide. The flush mount airfoil flips back out of the way for cleanup. Under the airfoil is a containment trough to capture accidental spills that may flow over the dished work surface. Trough assembly is fabricated of 304 stainless steel. Standard Features: Options: U.L Classified Shown with: Airflow Monitor and External Vacuum Breaker Options Special applications and other options available upon request. Fume Hoods.16

17 51500 Series ADA Design Airfoil-Type Hood Overall: Superstructure: Worktop: Steel Base: Hood Opening: Exhaust Parameters: 580 CFM.50 SP Open kneespace allows use of Rollout Flammable Storage Cabinet (see page 24) Includes base assembly Overall: Superstructure: Worktop: Steel Base with (1) 12"W Cabinet: Hood Opening: Exhaust Parameters: 770 CFM.60 SP Open kneespace allows use of Rollout Flammable Storage Cabinet (see page 24) Includes base assembly Overall: Superstructure: Worktop: Steel Base with (2) 18"W Cabinets: Hood Opening: Exhaust Parameters: 950 CFM.75 SP Open kneespace allows use of Rollout Flammable Storage Cabinet (see page 24) Includes base assembly Fume Hoods.17

18 51600 Series Radio Isotope Hood The SERIES hood has the same aerodynamic design as the Series standard airfoil-type hood with the added feature of flush mount radius construction on a one-piece 304 stainless steel liner and countertop. The standard vertical rising sash is fabricated from 16-gauge type 304 stainless steel with the same chemical resistance as the rest of the hood. The exterior is fabricated of cold rolled steel and finished with acid wash and powder coat epoxy paint. The solid frame galvanized steel construction provides stability. Posts are 5" (127mm) wide. Standard Features: Light Switch Options: U.L Classified Shown with: Airflow Monitor and External Vacuum Breaker Options Special applications and other options available upon request. Fume Hoods.18

19 51600 Series Radio Isotope Hood Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 570 CFM.25 SP 200 pounds (approx.) Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 1095 CFM.34 SP 225 pounds (approx.) Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 1360 CFM.34 SP 270 pounds (approx.) Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 1880 CFM.40 SP 300 pounds (approx.) 96" hood includes cold water faucet, gas fixture, and cup sink on both left and right hand sides. Fume Hoods.19

20 51700 Series Perchloric Acid Hood The SERIES hood has the same aerodynamic design as the Series and features a built-in trough to capture runoff in washdown procedures where perchloric acid is in use. Also included is a manual washdown feature for the areas behind the baffles as well as the duct collar areas. The interior of the hood is fabricated of 316 stainless steel and is integrally welded to a 316 stainless steel work surface, buffed and polished to a #4 finish. Top is 1-1/4" with a 1/4" dish to retain any spills. The flush mount radiused airfoil is type 316 stainless steel, with same chemical resistance as rest of hood. The standard vertical rising sash is fabricated from 16-gauge type 316 stainless steel, with the same chemical resistance as the rest of the hood. It has a fulllength finger lift, designed to eliminate reverse air currents along the sash opening. Standard Features: Options: U.L Classified Shown with: Airflow Monitor and External Vacuum Breaker Options Special applications and other options available upon request. Fume Hoods.20

21 51700 Series Perchloric Acid Hood Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 770 CFM.33 SP 200 pounds (approx.) Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 1000 CFM.34 SP 225 pounds (approx.) Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 1250 CFM.34 SP 270 pounds (approx.) Superstructure: Integral Worktop: Hood Opening: Exhaust Parameters: 1880 CFM.40 SP 300 pounds (approx.) 96" hood includes cold water faucet, gas fixture, and cup sink on both left and right hand sides. Fume Hoods.21

22 Portable Fume Hoods OR BLOWER 14" 1" 36 1/4" (shown with epoxy top and cart) Hood Only HEPA Filter Portable Hood Hood with Epoxy Top Hood with Epoxy Top and Cart Hood Only Vented Exhaust Portable Hood Hood with Epoxy Top Hood with Epoxy Top and Cart The HEPA Filter Portable Hood requires no exhaust hoses or wall ducts and is completely self-contained. The backward-curve design includes a 120V variable speed blower to maximize efficiency and minimize noise. The 99.99% efficient HEPA filter is replaceable from the top of the unit. A one-inch 30% pre-filter is replaceable from the interior. Filter and blower sit atop a welded powder coated steel structure. Chamber is enclosed with plexiglass windows for viewing from all four sides. Front fold-up door allows access for apparatus and experiments. Standard Features: The Vented Exhaust Portable Hood requires 2" flexhose and wall duct. The backward-curve design includes a 1/6 HP 120V 80 CFM blower. This self-contained unit has side discharge through a 2" side fitting and requires use of 2" flexhose to safe ventable area. Unit has welded powder coated steel structure. Chamber is enclosed with plexiglass windows for viewing from all four sides. Front fold-up door allows access for apparatus and experiments. (2" flexhose and wall duct not included.) Standard Features: Special applications and other options available upon request. Special applications and other options available upon request. Fume Hoods.22

23 Canopy Fume Hoods Canopy fume hoods are designed to collect and exhaust heat, steam, and odors when mounted above hot plates, water baths, or portable equipment. They are available in three models and six standard widths. Custom sizes are also available. Standard canopy hoods are available in 18-gauge cold rolled steel, finished with acid wash and powder coat epoxy paint. Stainless canopy hoods are fabricated of 16-gauge 304 stainless steel with a #4 smooth grain finish. Flat Back/Flat Sides Flat Back/Sloped Sides Center Style Powder Coated 2 Stainless Steel Threaded Rods Stainless Steel 2 Stainless Steel Threaded Rods Powder Coated 2 Stainless Steel Threaded Rods Stainless Steel 2 Stainless Steel Threaded Rods Powder Coated 4 Stainless Steel Threaded Rods Stainless Steel 4 Stainless Steel Threaded Rods Fume Hoods.23

24 Options Ceiling Enclosures/Lattice Assembly Series Ceiling Enclosures The SERIES ceiling enclosures provide a professional, finished design in any setting. Ceiling enclosures are fabricated of cold rolled steel and finished to match the fume hood superstructure. Ceiling enclosures extend from top of hood to ceiling height or soffit. To specify, provide model number and size of hood, plus floor-to-ceiling or floor-to-soffit dimension. CEILING ENCLOSURE ASSEMBLY DETAIL Lattice Assembly The lattice assembly consists of 1/2" diameter aluminum apparatus rods with side mounting plates and cross clamps. Lattice assembly may be added to hood in field when not ordered with hood. To specify, provide model number and size of hood. Fume Hoods.24

25 Options Airflow Monitor AFA 500 Mk3 Fume Hood Airflow Monitor Airflow monitors are highly recommended for use and must be ordered with hood. Not sold separately. Alarm range F.P.M. ( m/s) Accuracy Face velocity accuracy +/- 10% Airflow sensor On-board or Remote sensor Calibration Single or 2-point (Installer selectable) Low Air Alarm delay Fixed 5 secs Relay output 1--(Low Air alarm) Analog output Not available Relay input 2-Night setback and Sash High Comm. Port RS232 - Can be connected via Serial interface to LAN network (Full hood performance software reporting available) External alarm indication Not available Power Requirement Input - 120VAC, 60Hz Output - 15VDC, 500ma Display - visual LEDs: red, alarm; green, normal Alarm indication Red LED and audible alarm Horn silence Temporary Mounting Semi Flush Operating temperature degrees F (13-30 C) Storage temperature degrees F ( C) Instrument dimensions Instrument Case: 5.2"H x 3.19"W x 1.97"D (132mm H x 81mm W x 50mm D) Agency listings U.L. & CE Options: Sash high indication Night setback Uses a micro switch or Proximity switch input. With repeat alarm feature factory set to 5 min. (Can be adjusted via laptop up to 30 mins) Uses a relay input Fume Hoods.25

26 Base Cabinets The metal fume hood base cabinets conform to the method of testing and performance requirements set forth in the Scientific Apparatus Makers Association (SAMA): Sheet steel shall be mild, cold rolled, prime grade, stretcher leveled, re-squared, free from scale, rust, etching, deep scratches, ragged edges or other imperfections. ADA Base Frame Matches Hood Color Actual Height " Hood Base Cabinet Matches Hood Color Acid Storage Cabinet Matches Hood Color Flammable Storage Cabinet Rollout Flammable Storage Cabinet Standard Yellow Color Flame Resistant Adjustable Galvanized Steel Shelf 2" Removable Spill Pan Standard Yellow Color Flame Resistant 27" Height Includes Casters Shipping Weight 160# Swivel Casters, (2) with Brake Adjustable Galvanized Steel Shelf 2" Removable Spill Pan Fume Hoods.26

27 Local Extractors Technical Description/Table Mount Technical Description All Models FRICTION JOINTS Adjustable polypropene (PP) friction joints with ball bearings. "0" ring made of corrosion resistant rubber. Supporting springs and other mounting parts made of zinc-plated steel. TUBES Made of thin-walled aluminum or polypropylene. Air tight dampers supplied as standard. FAN AND FILTERS Connect to separate fan, central extraction system, or filter. PRACTICE VALUES AIR FLOW Laboratory, Schools, Chemistry Institutions 3" DIA 90 CFM 40 L/S OTHER INFORMATION Color, friction joints white Air temperature range 5 F to 175 F Weight 3.3 to 6.8 lb Connection 03 7/8 Table Mount - 3 Joints Assembled, with plate for table mounting, without hood or suction nozzle. Part Measure Inch Max Standard A B C Radius B PP 16" 12" 3" 40" B PP 22" 18" 3" 51" B PP 30" 18" 3" 60" Total pressure drop in/wg 3,5 3,0 2,5 2,0 1,5 1,0 0,5 10 Air flow l/s O3" Table 3 joints Air flow cfm Flexible bracket for mounting on tabletop or shelf. Sold as accessory. Suitable for 03". Delivered complete with two "C" clamps. Table Bracket BF Fume Hoods.27

28 Local Extractors Wall Mount Wall Mount - 3 Joints Assembled, with bracket for wall mounting, without hood or suction nozzle. Part Measure Inch Max Standard A B C Radius V PP 16" 12" 3" 40" V PP 22" 18" 3" 51" V PP 30" 18" 3" 60" V PP 40" 26" 3" 80" Air flow l/s Total pressure drop in/wg 3,0 2,5 2,0 1,5 1,0 0,5 O3" Wall 3 joints Air flow cfm Recommended Mounting Height and Side Displacement for Mounting of Wall and Ceiling Length Height from Side Displacement from Bench Workplace Center A B 40" 28" - 40" 12" - 24" 51" 38" - 48" 16" - 28" 60" 44" - 52" 20" - 32" 80" 48" - 68" 28" - 40" Wall Bracket VK When ordering a wall mount extractor, the wall bracket will be supplied. Fume Hoods.28

29 Local Extractors Ceiling Mount Ceiling Mount - 3 Joints Assembled without hood or suction nozzle. Ceiling bracket ordered separately. Part Measure Inch Max Standard A B C Radius T PP 16" 12" 3" 40" T PP 22" 18" 3" 51" T PP 30" 18" 3" 60" T PP 40" 26" 3" 80" Total pressure drop in/wg 3,5 3,0 2,5 2,0 1,5 1,0 0,5 10 Air flow l/s O3" Ceiling 3 joints Air flow cfm Designed for ceiling mounting, suitable for 3" arm, 5 standard lengths with side connection to duct 4". Standard design: powder coated sheet steel. Part Measure Standard L Inches TIM " TIM " TIM " TIM " TIM " Escutcheon plate, used with ceiling mounting TIM for stability and to cover the ceiling tile hole. Made of polypropylene. Ceiling Bracket TIM The ceiling mounting may be done placing the sleeve coupling above or below the ceiling. In the latter case, TIM CT is suitable. Escutcheon Plate TIM CT Designed for ceiling mounting, suitable for 3" arm, for extracting exhaust air vertically. Mounting plate and pipes delivered unassembled to facilitate adjusting final assembly height. Standard design: powder coated sheet steel. The exhaust air-duct is connected to the top of the tube. For extra stable mounting, use an extra mounting plate. Ceiling Bracket TIF 1000 Fume Hoods.29

30 Local Extractors Hoods/Accessories Dome Hood Used to get close to the source of pollution and screen off the sides, without obscuring the vision of the workpiece. Model # K Temperature Range 5 F to 175 F Flat Screen Hood Designed to maximize the working radius without obscuring the vision of the workpiece. Offers the best extraction efficiency at table and bench work. Model # PH Temperature Range 5 F to 175 F Square Hood Used for capturing gases from above or the sides of the work area. The configuration makes the square hood capture gases efficiently, without obscuring the vision of the workpiece. Model # SH Temperature Range 5 F to 175 F Suction Nozzle Used for work in difficult conditions. You can get close to the source of pollution without obscuring the vision of the workpiece. Model # S Temperature Range 5 F to 175 F Fume Hoods.30

31 Laboratory Cabinetry and Specialties Fume Hoods.31

32 Due to continuing product development, Stevens reserves the right to change specifications without notice Stevens Industries, Inc FumeHoods.9/09 STEVENS INDUSTRIES, INC. 704 West Main Street Teutopolis, Illinois P: