July 22, 1994

Contract \# TW0592

**SPECIAL SPECIFICATION**

**SECTION 15493**

**[LAMINAR FLOW BENCHES/FUME HOOD]{.underline}**

[Page]{.underline}

**[PART 1 - GENERAL]{.underline}**

1.01 Description. 2

1.02Related Work.. 2

1.03Quality Assurance. 2

1.04References. 2

1.05Submittals. 2

1.06 Delivery, Storage, and Handling. 3

1.07 Project/Site Conditions. 4

**[PART 2 - PRODUCTS]{.underline}**

2.01Acceptable Manufacturers. 5

2.02 Equipment. 5

**[PART 3 - EXECUTION]{.underline}**

3.01 Inspection. 8

3.02 Installation/Application/Erection. 8

3.03 Field Quality Control. 8

3.04 Adjusting and Cleaning 9

3.05 Commissioning. 9

3.06 Demonstration. 9

**SPECIAL SPECIFICATION**

**SECTION 15493**

**[LAMINAR FLOW BENCHES/FUME HOOD]{.underline}**

**[PART 1 - GENERAL]{.underline}**

**1.01 [DESCRIPTION]{.underline}**

> A. This Section covers requirements for providing laminar flow
> benches/fume hood with pre-piped and pre-wired connections.

**1.02 [RELATED WORK]{.underline}**

> A. Section 01300
>
> B. Section 15010
>
> C. Section 15892
>
> D. Section 15994
>
> E. Section 15995

**1.03 [QUALITY ASSURANCE]{.underline}**

> A. Certify the laminar flow bench performance according to Federal
> Standard 209.

**1.04 [REFERENCES]{.underline}**

> A. Federal Standard 209
>
> B. National Fire Protection Association (NFPA) 70, National Electrical
> Code (NEC).

**1.05 [SUBMITTALS]{.underline}**

> A. Make submittals according to this Section, Section 15010, and
> Section 01300.
>
> B. Product data for each laminar flow benches/fume hood:
>
> 1\. Unit design requirements.
>
> 2\. Unit features.
>
> 3\. Weights (shipping, installed, and operating).
>
> 4\. Furnished accessories.
>
> 5\. Installation and start-up instructions.
>
> C. Shop drawings detailing fabrication and installation of laminar
> flow benches/fume hood including plans, elevations, sections,
> component details, attachments, color finishes, and other construction
> elements. Include the following:
>
> 1\. Dimensions.
>
> 2\. Weight loadings and distribution.
>
> 3\. Clearances for maintenance and operation.
>
> 4\. Size and location of field connections.
>
> D. Wiring diagrams detailing power and control wiring. Differentiate
> clearly between manufacturer-installed wiring and field-installed
> wiring.
>
> E. Maintenance data for each laminar flow benches/fume hood.
>
> F. Certification of performance from the factory.
>
> G. Certification letter from manufacturer stating that the laminar
> flow benches/fume hood have been through start-up procedures and that
> they are functioning properly.

**1.06 [DELIVERY, STORAGE, AND HANDLING]{.underline}**

> A. See Section 15010.
>
> B. Protect laminar flow benches/fume hood from damage by factory
> packing.
>
> C. Reject any damaged laminar flow benches/fume hood upon arrival.
>
> D. Store laminar flow benches/fume hood to prevent damage, and protect
> from weather, dirt, fumes, water, and construction debris. Provide a
> clean dry space.
>
> E. Handle laminar flow benches/fume hood according to the
> manufacturer\'s rigging and installation instructions for unloading
> and transporting into the final location.

**1.07 [PROJECT/SITE CONDITIONS]{.underline}**

> A. Coordinate layout and installation of the laminar flow benches/fume
> hood with the piping system and exhaust ductwork. Revise locations to
> suit field conditions and as approved by the Architect/Engineer (A/E).
>
> B. Coordinate installation with laboratory furniture installation.

**[PART 2 - PRODUCTS]{.underline}**

**2.01 [ACCEPTABLE MANUFACTURERS]{.underline}**

> A. Liberty Industries, Inc. or approved substitute

**2.02 [EQUIPMENT]{.underline}**

> A. General
>
> 1\. Provide a blower, filter unit, sash (or cover), work surface,
> frame/chassis, side panels, base cabinets (or support legs), lights,
> power cord, and services for the laminar flow benches/fume hood as
> indicated in this Section. Provide features and services as indicated
> in Tables 1, 2, and 3.
>
> 2\. Provide UL labeled components for the units.
>
> 3\. Provide a unit that delivers air across the entire cross-section
> in accordance with Federal Standard 209d (90 +/- 20 fpm).
>
> B. Physical Characteristics
>
> 1\. Construct the blower to be dynamically balanced without the use of
> speed controls. Provide a 115-Volt, 1-phase, 60-Hertz motor for the
> blower. Size the blower assembly to provide air flow with a minimum 50
> percent increase in the HEPA filter pressure drop.
>
> 2\. Provide vibration isolation and seismic snubbers for the blower
> according to Section 15200-S.
>
> 3\. Design the laminar flow bench noise generation to be less than the
> Occupational Safety and Health Administration\'s required level.
>
> 4\. Provide industry-standard, 99.99 percent efficient, HEPA filter
> units per IES-RP-CC001.3 which are inter-changeable with filters of
> the same size on other laminar flow benches and the laminar flow fume
> hood.
>
> 5\. Provide minimum 16-gage (ga.) metal; use 304 or 316 stainless
> steel where stainless steel is identified.
>
> 6\. Provide pre-piped and labeled piping connections, so all
> connections are made exterior to the laminar flow bench. Provide
> pre-wired power connections with a pre-wired, 3-prong, 8-foot long,
> power cord.
>
> 7\. Construct the laminar flow bench exterior of welded cold-rolled
> steel or stainless steel component parts as indicated in Table 1.
> Provide access panels which are attached with screws to allow for
> removal of the panels. Provide front, rear, and side access panels for
> maintenance. Provide for front removal of the filters through the
> access panels. Provide steel component parts with an acid, alkali, and
> solvent resistant finish on both exterior and interior surfaces after
> fabrication of all cold-rolled steel parts and prior to final
> assembly. Provide approved finish color.
>
> 8\. Provide at the top of the laminar flow bench a fluorescent or
> incandescent light fixture as indicated in Table 2. Provide a fixture
> shielded from the hood interior by a tempered glass panel sealed to
> the hood by an extruded vinyl channel. Provide electronic ballasts and
> T-8 lamps for fluorescent fixtures.
>
> 9\. Provide a sash (or cover) for the hood as indicated in Table 1.
> Provide a 16-mil transparent vinyl plastic film with snaps or 1/4-in.
> transparent lexan for the sash as indicated in Table 1. Provide a
> stainless steel piano hinge full length for the sash (or cover) which
> permits the sash (or cover) to be lifted from the front of the laminar
> flow bench for easier access during equipment placement. Provide
> hooks, clamps, or snaps to hold the sash (or cover) up during this
> equipment placement.
>
> 10\. Construct the laminar flow benches/fume hood to permit passage
> through a 3-foot by 7-foot personnel door.
>
> 11\. Design the laminar flow fume hood exhaust to be down through the
> working surface and out the back of the base cabinet.
>
> 12\. Interior Surface Construction
>
> a\. Provide laminar flow bench interior materials as indicated in
> Table 1. Provide minimum 16-ga. metal, 304 or 316 stainless steel
> where stainless steel is indicated. Weld stainless steel materials
> together. Triple weld polypropylene materials together. Provide
> neoprene gaskets to join dissimilar materials.
>
> b\. For areas exposed to the laminar flow bench interior, use
> stainless steel fasteners on removable parts.
>
> c\. Provide a smooth finish on the interior surfaces to reduce dirt
> accumulation.
>
> d\. Provide 14-ga. reinforced stainless steel for the work surface as
> indicated in Table 1.
>
> e\. Provide reinforced working surface capable of supporting 100
> pounds per square foot without damage or warping.
>
> 13\. Features
>
> a\. Provide features as indicated in Tables 2 and 3.
>
> b\. Provide a Dwyer \"Magnehelic\" Gauge or approved substitute for
> the air filter gauge. Provide a scale range which exceeds the system
> operating range by 100 percent both above and below the operating
> range limits unless noted otherwise on the Drawings. Provide 2, 5, or
> 10 unit scale divisions as appropriate to system range. Provide in.
> w.g. divisions.
>
> 14\. Service Locations
>
> a\. See Table 3.
>
> b\. Locate the duplexes, remote valve operators, and light switches on
> the laminar flow bench front exterior surface as identified in Table
> 3. Replace duplexes with a power strip having equal number of outlets
> and same protection, if so desired.
>
> c\. Provide 3/8-in. service valves with remote serrated hose
> connection located on the laminar flow bench work surface.

**[PART 3 - EXECUTION]{.underline}**

**3.01 [INSPECTION]{.underline}**

> A. Inspect areas and conditions, with Installer present, for
> compliance with requirements for installation tolerances, and other
> conditions affecting performance of the laminar flow benches/fume
> hood.
>
> B. Inspect rough-in for utilities to verify actual locations of
> connections prior to installation.
>
> C. Do not proceed until unsatisfactory conditions have been corrected.

**3.02 [INSTALLATION/APPLICATION/ERECTION]{.underline}**

> A. General
>
> 1\. Install laminar flow benches/fume hood level and plumb, in
> accordance with manufacturer\'s written instructions.
>
> 2\. Arrange installation of units to provide access space for service
> and maintenance.
>
> B. Connections
>
> 1\. Piping installation requirements are specified in other Division
> 15 sections. The Drawings indicate the general arrangement of piping,
> valves, fittings, and specialties.
>
> 2\. Electrical Connections: The following requirements apply:
>
> a\. Connect unit components to ground in accordance with the NEC.

**3.03 [FIELD QUALITY CONTROL]{.underline}**

> A. Arrange and pay for a factory-authorized service representative to
> perform the following:
>
> 1\. Inspect the field assembly of components and installation of the
> laminar flow benches/fume hood including piping and electrical
> connections.
>
> 2\. Inspect the blower operation and confirm proper installation of
> the HEPA filters.
>
> 3\. Prepare a written report on findings and recommended corrective
> actions.

**3.04 [ADJUSTING AND CLEANING]{.underline}**

> A. Adjust sashes for proper operation.
>
> B. Clean unit laminar flow bench interiors to remove foreign material
> and construction dirt and dust.

**3.05 [COMMISSIONING]{.underline}**

> A. Provide labor, material, equipment, etc., required to facilitate
> the commissioning process. Perform form tests and verification
> procedures required by the commissioning process when requested by the
> Commissioning Authority and directed by the General Contractor. See
> Section 15995.

**3.06 [DEMONSTRATION]{.underline}**

> A. Provide a factory-authorized service representative supervise
> start-up of equipment, to demonstrate operation, and to train
> personnel.
>
> B. See Section 15995.
>
> END OF SECTION

EXCEPT FOR ATTACHMENTS

LAMINAR FLOW BENCHES/FUME HOOD SPECIFICATION TABLES 1, 2 & 3

**LAMINAR**

**FLOW**

**BENCHES/FUME**

**HOOD**

**SPECIFICATION**

**TABLE 1**

**Dimensions** **Construction** **Basis of Design**

**Equip.Room** **Material**

**No.**

**LFB-**

**B =** **PP = polypropylene,**

**Back,** **PVC = polyvinyl**

**B =** **chloride,**

**blue** **S = slate,**

**oil-** **SS = stainless**

**based** **steel,**

**paint,** **VPF = snapdown vinyl plastic**

**ER =** **film,**

**epoxy** **WS = white**

**(chemicalenameled**

**resistant)steel**

**resin,**

**Fr =**

**Front,**

**G = glass,**

**L = lexan,**

**PG = plexiglas,**

**PL =**

**plastic**

**laminate,**

**Maximum** **Maximum** **Working** **Working** **Opening** **Sash**
**Working** **Frame/Drain** **Side** **Base** **Filter**

**Unit** **Unit** **Surface** **Surface** **Height** **or**
**SurfaceChassis** **Panels** **Cabinet** **Unit**

**Width** **Height** **Height** **Depth** **Inches** **Cover** **or**
**Housing**

**Inches** **Inches** **Inches** **Inches** **Support**

**Legs**

1 1404 62.5 102 35 30 36 Fr, L SS SS - G SS SS

2 1303 62.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

3 1303 62.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

4 1303 50.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

5 1303 50.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

6 1303 50.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

7 1303 50.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

8 1303 50.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

9 1401 98.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

10 1401 98.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

11 1401 98.5 102 35 30 36 Fr, SS SS - G SS SS

VPF

12 1106 62.5 102 30 24 22 Fr, SS SS - G WS WS

VPF

19 1504 74.5 102 30 30 30 - SS SS - L WS WS

20 1504 74.5 102 30 30 30 - SS SS - L WS WS

21 2207 74.5 102 30 36 21 - PL SS - PG B B

22 2207 74.5 102 30 36 21 - PL SS - PG B B

23 2207 74.5 102 36 36 36 - PL SS - PG WS WS

24 2207 74.5 102 30 36 21 - PL SS - PG B B

25 2207 74.5 102 30 30 21 - PL SS - PG B B

26 2205 74.5 102 36 30 36 - PL SS - PG WS WS

27 2205 74.5 102 36 30 36 - PL SS - PG WS WS

LFH- 1403 74.5 102 36 28 30 VPF SS WS - SS WS WS

1

**LAMINAR**

**FLOW**

**BENCHES/FUME**

**HOOD**

**SPECIFICATION**

**TABLE 2**

**Equip.** **Room** **Features**

**No.**

**LFB-**

**Support** **Air Flow** **Air** **Air** **Work Surface**

**Structure** **Lighting** **Sink** **Drain** **Pattern** **Intake**
**Exhaust** **Perforated**

**Location** **Location**

**(125**

**footcandles**

**at the work**

**surface)**

**Support** **Base**

**Legs** **Cabinet**

**Y = Yes** **Y = Yes** **D = Doors** **F =** **Y = Yes** **Y = Yes**
**D = Down** **I = Air Flow** **T = Top** **T = Top** **Y = Yes**

**Dr =** **Fluorescent** **Into**

**N = No** **N = No** **Drawers** **N = No** **N = No** **H =**
**Bench** **B =** **B =** **N = No**

**Ds = Doors** **I =** **Horizontal** **O = Air Flow** **Bottom**
**Bottom**

**&** **Incandescent** **Out of**

**Shelves** **Bench**

**S =** **E = Exhaust**

**Shelves**

1 1404 N Y D F N N D O T - N

2 1303 N Y D F N N D O T - N

3 1303 N Y D F N N D O T - N

4 1303 N Y D F N N D O T - N

5 1303 N Y D F N N D O T - N

6 1303 N Y D F N N D O T - N

7 1303 N Y D F N N D O T - N

8 1303 N Y D F N N D O T - N

9 1401 N Y D F N N D O T - N

10 1401 N Y D F N N D O T - N

11 1401 N Y D F N N D O T - N

12 1106 Y N - F N N D O T - N

19 1504 Y N - F N N H O B - N

20 1504 Y N - F N N H O B - N

21 2207 N Y D F N N H O B - N

22 2207 N Y D F N N H O B - N

23 2207 Y N - F N N D O T - N

24 2207 N Y D F N N H O B - N

25 2207 N Y D F N N H O B - N

26 2205 Y N - F N N H O B - N

27 2205 Y N - F N N H O B - N

LFH-1 1403 N Y D F N N N E T B Y

**LAMINAR**

**FLOW**

**BENCHES/FUME**

**HOOD**

**SPECIFICATION**

**TABLE**

**3**

**Features** **Service**

**Equip.** **Room** **Locations**

**No.**

**LFB-**

**Air Intake Filters** **Frame** **Ar =** **Duplex,** **with** **on**

**Groundedargon,** **FP = foot pedal operator,airthe**

**Y = Yes, N = No** **BS =** **LS = lightflow** **right,**

**blower** **switch,** **rate** **2R**

**switch,N2 =** **gauge = 2**

**DPLX** **nitrogen,** **L =** **on**

**= 120** **NPW =** **1** **the**

**V,** **non-** **on** **right,**

**GFCI,** **potable** **the** **etc.**

**Duplex,water,** **left,**

**NDPLX** **R\'stat = Rheostat2L**

**= 120** **to** **= 2**

**V,** **control** **on**

**Non-** **laminar** **the**

**GFCI,** **flow** **left,**

**DI =** **bench** **etc.**

**deionizedair flowR =**

**water,** **rate** **1**

**Roughing** **30% NBS** **99.99%Y =** **Grounding** **N2** **Ar**
**Duster**

**Filter** **EfficientEfficientYesTerminals** **Gun**

**on** **Y =**

**0.3** **N =** **Yes**

**micron** **No** **N = No**

**and**

**smaller**

**particles**

**per**

**IES-RP-CC001.3**

**DI** **NPW** **R\'stat** **NDPLX** **DPLX** **LS** **BS** 1 1404 N N Y
Y L - -

Y - - - 2L - L L 2 1303 N N Y Y L L

\- Y - - - 2L - L L 3 1303 N N Y Y L

L - Y - - - 2L - L L 4 1303 N N Y Y

L L - Y - - - 2L - L L 5 1303 N N Y

Y L L - Y - - - 2L - L L 6 1303 N N

Y Y L L - Y - - - 2L - L L 7 1303 N

N Y Y L L - Y - - - 2L - L L 8 1303

N N Y Y L L - Y - - - 2L - L L 9

1401 N N Y Y L L - Y - - - 4L - L L

10 1401 N N Y Y L L - Y - - - 4L - L

L 11 1401 N N Y Y L L - Y - - - 4L -

L L 12 1106 N N Y Y L L - Y - - - -

2L L L 19 1504 N N N N - L - Y - - -

\- L L L 20 1504 N N N N - L - Y - -

\- - L L L 21 2207 N N Y N - L - N -

\- R L - L L 22 2207 N N Y N - L - N

\- - R L - L L 23 2207 N N Y N - L -

N - - - - - L L 24 2207 N N Y N - L

\- N - - R L - L L 25 2207 N N Y N -

L - N - - R L - L L 26 2205 N N Y N

\- - - N - - - L - L L 27 2205 N N Y

N - - - N - - - L - L L LFH-1 1403 N N

Y Y L L L N R R - - 2L L L