High-performance chemistry hood to eliminate hazardous fumes, chemicals, compounds and more. The laboratory fume hood is chemical and heat resistant. The chemical fume hood unsurpassed containment of chemical fumes and vapors with the lowest possible energy consumption.
High performance. Protecting people. Mission accomplished.
Chemistry hood has been protecting lab techs since 1925. We design every lab fume hood to keep hazardous fumes away from you and your lab and maximize containment.
High-Performance Fume Hoods:
- 60 fpm or less face velocity
- At maximum sash opening height (25″ minimum)
- Tested per ANSI/ASHRAE 110
- Mannequin 3″ from sash plane
- A detector in the breathing zone
- 0 AM 0.05
Protector® Chemistry Hood
The Protector chemistry hood is the culmination of lab conquered seventy-five years of research and development in laboratory fume hood technology. The Protector chemistry hood offers unsurpassed containment of chemical fumes and vapors with the lowest possible energy consumption.
Smoke tests in traditional lab hoods show the tendency for contaminants generated in the interior to roll forward. Producing high concentrations of fumes behind the sash in close proximity to the user’s breathing area. In contrast, smoke tests on Protector chemistry hood show contaminants are removed in a single pass with a remarkable lack of turbulence. The result is a dramatic reduction in the concentration of hazards within the laboratory fume hood.
No Contaminants Escape The Chemistry Hood
This efficient airflow is created by several unique features of the Protector fume hood. The aerodynamic curve of the airfoil along with the large radial edge of the work surface function together to correct airflow prone to reversal in traditional fume hoods. This directs air to sweep the dish to work surface for maximum containment. Explicitly designed for robust containment during use clean sweep openings pull naturally accelerated inflow air from under the airfoil so that clean air continually flows in front of the lab fume hood user creating a constant protective barrier from contaminants.
The low profile aerodynamic sash handle directs airflow above and below. Reducing the probability of contaminated air escaping into the user’s breathing space. A continuous slot runs the entire height of the sash opening within the sash tracks. This passive opening allows small volumes of clean air to enter the chemical hood at the plane of the sash for an added barrier of protection.
The upper dilution air supply regularly bathes the laboratroy fume hood interior above the work area with clean air to eliminate chemical fumes along the sash plane near the user’s breathing area. This air is directed down the backside of the sash and the remainder is drawn through perforations into the upper fume hood chamber. This method of bypass inflow manipulation yields zero static pressure change and any sash position resulting in a constant volumetric rate of air into the chemical hood for continuous air volume applications and sufficiently restricting the bypass when used with a variable air volume mechanical system.
Traditional Fume Hoods Vs. Our Chemistry Fume Hood
Traditional By-Pass Fume Hood Design
Smoke tests on traditional fume hoods demonstrate the tendency for contaminants generated in the interior to roll forward producing high concentrations of contaminants behind the sash in close proximity to the user’s breathing zone.
Protector XStream Chemistry Hood Design
In contrast, smoke tests on the Protector XStream show contaminants removed in a single pass and a lack of turbulence. Horizontal air flowing toward the baffle forces contaminants to the rear interior, away from the user. The upper dilution air supply sweeps the upper interior to eliminate stagnant pockets of air and to prevent contaminants from concentrating behind the sash. This airflow pattern is accomplished without additional blower(s) or moving components.
The most significant and innovative feature of the Protector chemical hood is the rear baffle system. When the sash is open to its energy-conserving 18-inch height or optional 28-inch full open height the slots in the primary baffle direct air in non turbulent streams from the fume hood face into the baffle in a single pass. The secondary baffle located between the primary baffle in the back wall counteracts the upward air streams that create row or vortex in traditional lab hoods.
In addition to mitigating vortex dependent containment, the primary baffle slots are arranged by ingenious designs. This specific baffle slot pattern is designed to manipulate and optimize the face velocity profile. The result is a reduction in the deviation from the profile average and reduction of turbulence.
Proven Highest Performance Chemical Fume Hood
The industry standard for chemistry hood containment is defined as a hood that meets the CFA requirements for high performance. CFA defines this as a fume hood with the sash fully open face velocity of sixty feet per minute and when subjected to an ashtray 110 test has levels of tracer gas at or below 0.05 parts per million in the manufacturer’s test facility.
Amazingly when the protector chemistry hood is subjected to the ashtray 110 test method there is no detectable level of tracer gas outside the fume hood. Even at face velocities as low as 40 feet per minute. During independent testing the protector extreme performed well beyond C4 1 standards with a face velocity of 40 feet per minute and it sash fully open to protect her extreme was subjected to 50 feet per minute cross draft NIH protocol and tracer gas measurements in the chest of the mannequin. In each scenario, the fume hoods allowed 0.00 parts per million average levels of tracer gas outside the chemical fume hood. Although your safety officer or industrial hygienist will determine the actual face velocity setting for your fume hoods standard of performance demonstrates the factor of safety built into extreme containment.
Safety is foremost but the protector extremes. Energy efficiency is equally impressive. Energy consumption is directly related to the volumetric rate measured in cubic feet per minute. Achieving 60 feet per minute face velocity on a six-foot extreme with the sash and its full open position requires only 690 cubic feet per minute regardless of your desired operating face velocity the protector extreme requires the lowest cubic feet per minute and lowest operating costs offering unrivaled containment and lowest possible energy consumption. The Protector chemistry hood is the pinnacle of modern lab fume hood design.
Build Your Fume Hoods System
1. Select Fume Hoods
2. Select Work Surface
3. Select Bast
Base Cabinet for acid, solvent or standard storage
4. Select Other Accessories
5. Select Remote Blower and Ductwork
Protector® XStream® Chemistry Hood
A laboratory fume hood is a ventilated enclosure where harmful materials can be handled safely. Air flows into the lab hood to capture and contain contaminants, preventing their escape into the laboratory.
Smoke tests provide a visual inspection of the fume hood’s ability to contain fumes generated inside with a sash and the raised position. Smoke is exhausted evenly from all areas of the chemical hood. Aerodynamically designed components such as the sash foil, vertical fascia, baffle, and liner enhance the fume hood’s ability to capture fumes.
As the sash is lowered, the speed of the air passing through, the sash opening increases. The bypass chemistry hood is designed to minimize the fluctuations in face velocity, has a sash is lowered or raised.
Fixtures models feature:
Two pre-plumbed service fixtures with forged brass valves, lower right side with brass tubing for gas, and lower left side with copper tubing for cold water. We provide components for converting either or both fixtures to air and vacuum. We do not provide inlet tubing.
For Use with Remote Blower Specifications
Air enters the hood through openings along the top of the lab fume hood and underneath the airfoil; even when the sash is in the fully closed position. The baffled directs the air to follow specific flow patterns within the fume hoods and also generates a uniform velocity of air.
Fumes generated near the work surface are drawn into the lower opening, the baffle in conjunction with the sash foil directs the air currents to sweep the work surface on hoods with open slots along the edges of the baffle. Fumes generated in the middle of the chemical hood are drawn in from the sides.
Many conditions affect the efficiency and safe operation of any chemistry hood for maximum containment. Work should be performed at least six inches inside the lab hoods. Large apparatus or clutter inside the chemistry hood can obstruct the airflow and allow fumes to escape. Apparatus should be elevated on blocks to allow air to flow under it. Abrupt movements can cause turbulence, allowing fumes to escape the sash should be lowered or raised gently.
8′ models available with:
Optional split dual tempered safety glass vertical-rising sashes with cable and pulleys and powder-coated sash handles.
10′, 12′ and 16′ models feature:
Split dual tempered safety glass vertical-rising sashes with cable and pulleys, powder-coated sash handles and 10″ (25.4 cm) high static viewing windows to permit the sashes to rise without extending above the fume hoods. Four sashes on 16′ models.
By knowing how it functions most efficiently, you can ensure that your lab safety ventilation system is effectively protecting you and your important work.
Location is important for optimal chemistry hood performance. The lab fume hood should be located away from windows, doors, ceiling, air diffusers, heat registers or fans that alter the air patterns in the laboratory. Personnel walking by can disrupt the airflow. So the hood should be installed in a low traffic area. Lowering the sash lessens the effect of traffic and other external airflow disturbances. To get the maximum performance from this important piece of laboratory safety equipment, it is important to understand the design and proper operation of your laboratory fume hood.