Lab Products/Lab Hood/Chemical Hood


 

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Laboratory Fume Hoods are one of the most important components used to protect laboratory personnel from exposure to hazardous chemicals and agents used in the laboratory. When used properly, they can provide an effective backup safety device for the containment and exhaust of toxic, offensive or flammable materials when the containment of an experiment or procedure fails and vapors or dust escape from the apparatus being used. We are one of the foremost Chemical Fume Hood Manufacturers and Stainless Steel Fume Hood Suppliers.

The Cabinet is made of thick ply board & reinforced with teak wood whatever necessary interiors coated with asbestos sheets, coated with epoxy paint or convert FRP lining as per requirements.

Working table is covered with glazed ceramic tiles and provided with necessary water inlet & outlets with sink (stainless steel). Provision of water inlet/outlet, sink will be on request only.

Front door is made of 6mm clear glass in laminated teakwood frame and connected with a counter weight balance through a nylon rope. The door will have the provision of vertical sliding facility.

Exhaust blower consists of single phase motor, directly connected with a PVC Exhaust blower consists of single phase motor, directly connected with a PVC impeller and enclosed in a epoxy coated MS casing. The rating, speed & capacity of the Blower sill are designed on the basis of the SIZE & VOLUME of the FUME HOOD.

However the suction velocity of the FUME HOOD will be around 100 cfm per square feet.

The exhaust assembly can be of build-in-type or external mount type. The blower assembly will directly be connected with suitable exhaust ducting, which is made of PVC pipes with suitable bend & joints and rain guard.

* Chemical & Fire resistant Phenolic Resin Lining inside the Chamber
* Different choice of worktops suitable for a wide range of applications (S.S/ GRANITE/TILES)
* Clear tempered safety glass sash utilizes counter weights for smooth and effortless operations


Options :

* Compact Ductwork System with Exhaust Fan
* Fume Scrubber
* Wash-Down System
* Electrical Wiring
* Solvent Storage Base Cabinet
* Acid Storage Base Cabinet
* Fire Proof Tiles

Chemical Fume Hoods

The laboratory chemical fume hood is the most common local exhaust ventilation system used in laboratories. Local exhaust ventilation is the primary method used to control inhalation exposures to hazardous substances. The system consists of a hood, ductwork, and an exhaust ventilation fan.

All fume hoods should have a continuous monitoring device to allow convenient confirmation of adequate hood performance. If a hood is found to have an improperly operating continuous monitoring device or lacks a device, contact REM to request repairs or installation of a continuous monitoring device. Common types of continuous monitoring devices are oil gauge manometers, Magnehelic gauges, and digital control indicators.

Fume hoods are surveyed annually by the Industrial Hygiene section of REM. The survey consists of measuring airflow velocity at the face opening of the hood, checking the hood sash for ease of movement as well as cracks and breaks in the glass, checking the hood light, and maintaining and recording the reading on the visual continuous monitoring device on the hood. Below are the method used by REM to measure airflow velocity of the various types of hoods found on the West Lafayette campus.

Horizontal Sash Opening Hoods: Position the sashes to obtain maximum face opening of the hood (half-sash). Ideally the measurement will be taken from the center of the face of the hood.

Vertical Sash Opening Hoods: The hood face will be defined as the area from the hood work surface or airfoil to the bottom of the hood sash. Raise the sash to the halfway point, or the sash stop if unit is equipped with a stop.

Combination Sash Hoods: Measure both ways (with vertical sash at half-sash; with horizontal sash positioned to obtain maximum face opening of the hood). Ideally the horizontal sash measurement will be taken from the center of the face of the hood. Two labels will be placed on the hood indicating the different approved working height/opening size.

Walk-in Hoods: close the bottom sash to the floor and raise the top sash 100%. If obstructions are in the area of the face of the hood, preventing proper sash placement, the hood will be posted with a "STORAGE ONLY." sign. Repairs will not be requested. A REM note will be left for the user, notifying of the status of the hood and instructing the user how to change the hood status.

Current Standard for Face Velocity Range and Appropriate Use

* General Use = Face Velocity (FV) 80 to 125 fpm
o 80 fpm ≤ FV ≤ 125 fpm

* Storage Only = Face Velocity less than 80 fpm or greater than 125 fpm
o FV < 80fpm or FV > 125 fpm

If adjustments to airflow or the continuous monitoring device are necessary, REM will request these adjustments. If other maintenance and/or repairs to the fume hood are required (such as broken sash glass or a burned out hood light), REM will contact the appropriate party, i.e., Building Deputy or Principal Investigator, and give a written notice of the specific repairs needed.

Upon completion of the survey of the hood, REM will record the:

* Face velocity measurement,
* Approved use status
* Date of inspection
* Name of person inspecting
* Expiration date

This information will be on a label and placed at the indicated approved working height related to that face velocity measurement. Hood users should place the hood sash at the working height indicated by the black arrow on the label when operating the hood.

Before using the hood, users should compare the reading indicated on the visual continuous monitoring device with the recorded reading on the sticker on or near that device. Instructions are printed on this sticker in the event of a variation in the two readings.