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Air Filtration System tailored to fit your needs at a great price? 

At Industrial Maid we offer the finest air filtration equipment and provide the  personal service the Midwest is known for.   Just give us a call or send us an e-mail if you have questions or if we can serve you in any way.
 
                                                
With a combined 30 years of experience designing air purification systems we welcome the chance to serve you.
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Application Pictures

Ventilation Hood Systems
APPLICATIONS CONTAMINANTS

Welding Stations

Welding Smoke & Fumes

Robotic Welding Stations

Smoke from Freshly Welded Parts

Molding Processes

Molding Odors & Vapors

Cold Heading & Quenching

Coolant, Smoke & Vapors

Vertical Hood Systems
Available in Various Sizes
from 2' x 3' to 6' x 10'

 

Vertical Fume Ventilation Hood  Specifications

 


 

CONSTRUCTION:
12 & 14 Ga. Powder Coated Steel Frame
3/16 Polyethylene Panels
Full Carbon Steel Construction Available
11 & 18 Ga. Hood Cam Door and Filter Latches
MOTOR:

3/4 HP 115/1/60
1 HP 208/230/460/3/60 TEFC
3 HP 208/230/460/3/60 TEFC
5 HP 208/230/460/3/60 TEFC

ELECTRICAL:Wired to Jct. Box

BLOWER:Direct Drive BI Wheel

FILTERS:
2" Aluminum Baffle Prefilter
4" Pleated Prefilter
95% Fiberglass Bag Filter

OPTIONS:
Eyebolts
Acoustic Lining
Magnahelic Pressure Gauge
Manometer
Floor Stand
Custom Welding Hood Sizes

VOLUME:
1000-6500 CFM @ .75" W.G.

DIMENSIONS:
RH36V-1         70" H x 40" W x 38" D
RH36V-IBD     80.5" H x 26" W x 25" D
RH36V-1X2     76.5" H x 66" W x 38" D
RH36V-1X3     86.25" H x  92" W x 38" D
RH36V-1X4     91" H x 118" W x 38" D
RH36V-2x2     76.5" H x 66" W x 61.5" D
RH36V-2x3   91" H x 92"  W x 62" D

WEIGHT:
534-1350 lbs. 

 * Efficiencies are based on ASHRAE test methods.

Welding fume ventilation
RH36V-1X2
INDUSTRIAL MAID RHV SERIES - WELDING VENTILATION HOODS

Industrial Maid introduces the new RHV welding hood – a complete packaged welding smoke and fume hood for industrial air filtration. The units can be configured to cover areas from 4’ X 4’ to 16’ X 16’ or larger if needed. A three stage filter system includes the baffle filter, 4” pleated filter (Merv) and a 95% multi-pocket main bag filter (Merv).  These filters will handle oily weld smoke and options are available to include a final HEPA filter for stainless steel or other applications requiring higher efficiency filtration. 

The RHV ventilation hood series incorporates a low static pressure motor blower package, require no compressed air and no handling of dust from trays or drums. The resulting fume extractor efficiency translates into an economical solution for handling welding smoke and fumes; dollars saved as a direct result of controlling utility costs.

AZTECH RH36V-1

1,600 CFM

SPEC SHEET

AZTECH RH36V-IBD

1,600 CFM

SPEC SHEET

AZTECH RH36V-1X2

2,000 CFM

SPEC SHEET

AZTECH RH36V-1X3

3,300 CFM

SPEC SHEET

AZTECH RH36V-1X4

4,500 CFM

SPEC SHEET

AZTECH RH36V-2X2

3,500 CFM

SPEC SHEET

AZTECH RH36V-2X3

4,500 CFM

SPEC SHEET

(Note: links to specifications and spec drawings will open in a new browser window for a more printer-friendly document)

Horizontal Industrial Fume Hood Systems
Available in Various Sizes
from 4' x 10' to 10' x 12'

 

Horizontal Industrial Ventilation Hood  Specifications

 

 

CONSTRUCTION:
17,10,14 & 16 Ga. Powder Coated Steel Frame
Powder Coated Steel Cabinet
3/16 Polyethylene Panels Available
4-way Aluminum Exhaust Grille
20 Galv. Steel Hood

MOTOR:
3/4 HP 115/1/60
2 HP 208/230/460/3/60 TEFC
3 HP 208/230/460/3/60 TEFC
5 HP 208/230/460/3/60 TEFC


ELECTRICAL:Wired to Jct. Box

BLOWER:
3/4 HP - Direct Drive
2 & 3 HP - Belt Drive
3 & 5 HP - Direct Drive High Pressure

FILTERS:
2" Aluminum Baffle Prefilter
4" Pleated Prefilter
95% Fiberglass Bag Filter


OPTIONS:
HEPA After Filter
Silencer
Magnahelic Pressure Gauge
Fluorescent Light Kit
6" AZTech Orange Strip Curtain

VOLUME:3000-6500 CFM @ .75" W.G.

DIMENSIONS:
3500

RH35-3       36.5" H x 87.5" W x 134" D
RH35-4       36.5" H x 112" W x 134" D
RH35-5       36.5" H x 136.5" W x 134" D
6000

RH60-3       36.5" H x  87.5" W x 144" D
RH60-4       36.5" H x 112" W x 144" D
RH60-5       36.5" H x 136.5  W x 144" D

WEIGHT: 700-1175 lbs.
 * Efficiencies are based on
ASHRAE
test methods.

Welding fume exhaust
RH35X3
welding hood
RH60-4X2

INDUSTRIAL MAID RH SERIES - WELDING VENTILATION HOODS

Industrial Maid introduces a full line of Robotic Welding Ventilation Hoods – in airflow ranges of 1,000 CFM to 10,000 CFM. The unique systems have a steel fabricated cabinet, easy access filter service doors and a three stage filter combination. The inlet filter is a washable baffle filter, the pre-filter is a Merv 7 pleated filter and the final filter is a multi-pocket Merv 13 filter bag. A final HEPA filter is available for stainless steel welding (to control hexavalent chromium). The product has been tested and proven to handle both dry and oily welding fume collection applications. The units are energy efficient, simple to service and offer a “low cost of ownership”. No dust trays or dump bins are necessary and the units do not require any compressed air. For more information on our performance guarantee and available sizes to meet your specific welding smoke cell application needs call TF:877-624-3247.
  

AZTECH RH3500

3,500 CFM

SPEC SHEET

AZTECH RH6000

6,000 CFM

SPEC SHEET

(Note: links to specifications and spec drawings will open in a new browser window for a more printer-friendly document)   

The Positioning of Welding Fume Exhaust Systems
Otherwise known as "Location, Location, Location"

The key to keeping workers safe from the dust, smoke and fumes that enter environmental air as a result of many industrial processes, is to capture the air with it's suspended particulates, before it is inhaled.  After investing precious time and money on welding fume exhaust systems, many business owners and safety managers would be alarmed to know that the majority of their workers are still breathing in harmful fumes.  A tour of too many manufacturing plants would find a frighteningly high number of source capture arms either suspended above the welder's head or too far away from the source to be effective.  If you stop to think about angles and airflow, a fume extractor hanging above a worker's head, could actually be pulling the weld fumes straight into his face and airspace.

3 Critical Pieces to Achieving Proper Source Capture of Welding Fumes are:

1) An easily positioned fume extractor with a well-designed industrial ventilation hood.

As we all know heat rises, so the welding smoke, fumes and particulates created by the heat of a welding arc naturally travel upwards above the weld.  Since the purpose of a fume extraction hood is to prevent fumes from entering a welder's breathing space, proper positioning of the ventilation hood should be of primary consideration.  The operator should make sure that the fume extractor is located above the weld and opposite him/her, effectively drawing the fumes out of the breathing space. 
 

2) Proper airflow through the fume extractor.

In most cases industrial fume hoods should be located within the distance of two hood diameters from the source of the fume smoke. However the final location should be determined only after careful analysis of variables such as the amount of airflow passing through the welding fume collector, the overall movement of air in the workspace and the specific design of the hood.  The most effective ventilation hood pulls in air from every direction so it is important to remember that the velocity of the moving air decreases sharply as you move away from the hood opening as illustrated in the diagram to the right.

The American Conference of Governmental Industrial Hygienists (ACGIH) offers the table below to illustrate the airflow formula for determining the capture velocities of some common hood designs.

The most commonly recommended air velocity across the welding area is in the range of 100 ft./min.  Higher velocities may compromise the shielding gas around the weld material.

Hood Type Description Aspect Ratio. W/L Airflow
Plain Opening

0.2 or Greater and Round

Q =V (10X2+A)

Flanged Opening

0.2 or Greater and Round

Q =0.75V (10X2+A)

Flanged Multiple Slot Opening 2 or More Slots 0.2 or Greater Q =0.75V (10X2+A)

Q = Volumetric airflow(cfm)  V = Centerline air velocity(fpm)  A = Area of hood opening  X = Distance from hood to source of the fumes

The concept that "more is better" does not necessarily apply here.  Many times those in charge of selecting a industrial ventilation hood system assume that very large volumes of air, or CFM, are necessary for optimum fume exhaust.  Using industrial fume hood design and air volume to determine the correct CFM required for any given application prevents wasting money by over heating and cooling plant air.  The most common formula to calculate how much airflow is required is Q =V (10X2+A).

For example, a welding application with a 6" diameter plain-opening round hood that requires 100 fpm at the welding zone would require 1020 CFM if the fume ventilation hood is placed 12" from the weld area.

Q = 100 fpm [10(1 ft.)2 + 0.196 ft.2]
Q = 1020 cfm

The same hood placed 8" from the source however would only require 464 CFM.

Q = 100 [10(8/12)2 + 0.196)]
Q = 464 cfm

Because the airflow pattern is different for each style of industrial ventilation hood, it is a good idea to use the same steps and formula to determine which is most efficient design for a given process.

3) Training welders to position the hood properly

The calculations above are simple but eye-opening examples of how moving a fume extractor just 4" closer to the fume source can mean the CFM required to maintain 100 fpm is reduced by more than 50%. It is vitally important that welders be trained in the importance of keeping welding fume collectors in the proper position in order to maximize the safety of their work environment and their health.

 


The Industrial Maid Ventilation Hood Systems use a three stage filter configuration.  A 2" baffle filter is used for spark arrestance (for fire safety issues), a 4" pleated pre-filter separates out the larger welding dust particles and a final multi-pocket high efficiency bag filter takes out all the smaller welding smoke & fume particulate.  The air cleaning system is designed to have a low air to cloth ratio (low air speed through the filters. This allows the filters to collect more dust & particulate, thus extending the filter life.  The units do not require the use of expensive cartridge filters or compressed air.  The filters can be serviced by disposal so no dust is handled from dump trays or drums.

It is important to note that the study of the potential dangers of exposure to welding fumes and welding smoke is ongoing.  Epidemiology indicates that pulmonary exposure to welding fumes could cause health issues such as inflammation of the lungs, neurotoxicity and in some cases even cancer.  The National Institute of Occupational Safety and Health (NIOSH) has constructed a system designed to generate a welding fume and inhalation exposure scenario that will be used to study which exposure conditions, generator criterion, and welding processes and materials cause biological feedback in an animal model.
 

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Page last updated: 06/08/2010