NBC Protection Features for Your, Nuclear Warfare, Biological Warfare and Chemical Warfare Filter

Our Safe Room Filter Construction

The heart of any chemical warfare or biological warfare carbon filter is always the blower.  Trying to get air through a carbon block filter is a little like trying to blow air through a ¾ inch piece of plywood.  Well, O.K. – it’s not that bad, but you get the idea.  Because of this high static pressure requirement, the engineers at Filter Science have developed the most advanced and efficient blower for a biological warfare or chemical warfare filter available today.  Designed from the bottom up specifically for your filter, it utilizes advanced custom computer technology to satisfy the demanding needs of an extended Nuclear, Biological, or Chemical attack.

Secure Blower Housing
The housing of every blower is 20 gauge welded steel.  It is painted with an electrostatic deposition powder coat for long life and durability.  In areas of blower attachment to the filter frame, we utilize 16 gauge steel for superior strength.  Each blower housing is fitted with a highly specialized curved inlet ring for maximum performance.  The air intake guard is 16 gauge Stainless Steel.

Ultra High Efficiency Blower Motor
24 Volt DC
Supply Voltage Range + 18 to 29Vdc
Speed Control via 0 to + 10Vdc Input (5mA Max Drive Current)
Brushless Electronic Commutation Provided by Dependable Solid State Circuitry
Dependable Ball Bearings
100% Electrically and Dynamically Tested
Electronic Locked Rotor Protection
Soft Start Inrush Current
Automatic Reset Capability
Polarity Protected
Pulse Width Modulation
Wide Operating Voltage Range

During an emergency, power may become a very important commodity.  If you are using a back up generator as a power supply, the more your Nuclear, Biological and Chemical filter uses, the less electricity you will have for other, possibly life saving, needs. The time to think about power consumption is before you purchase a filter.  If you lose the power grid in your area, and you only have battery power – the power consumption of your filter motor may become an important issue indeed.  To this end, the engineers at Filter Science have chosen to utilize a 24 Volt Brushless DC blower with Pulse Width Modulation speed control. The advantages of a brushless DC external rotor motor are numerous.  They have a favorable compact size because the motor is mounted within the blades or impeller.  These motors eliminate voltage or frequency variables, reduce EMI, operate more safely and have smoother acceleration.

Why a 24 Volt blower if I am using house current?  A good question, and the answer is a little complex, but we will try to make it simple.  A well wound DC motor is far more efficient than its 110 volt counterpart.  If, instead of brushes, you use a brushless technology which uses electronic circuitry to rapidly switch the magnetic fields instead of mechanical brushes, you are again increasing the efficiency, as well as extending the motor life to 50,000 hours instead of the standard 4 or 5,000 hours on a motor with brushes.  If you then control this motor with a PWM line or Pulse Width Modulation, you again increase efficiency.  These are all expensive options in blower production and significantly increase blower cost, however, the blower in each of our units is now close to five times more efficient in electrical power usage.  Exactly what you want in case of an emergency.

In addition, all our motors are totally enclosed so they run clean and stay clean.  This gives you longer life and trouble free operation.  The motor and blower will be there when you need them the most.

Advanced Switching Power Supply
For all you engineers out there – please see below.  For the rest of us – please just take our word for it.  This is real boring stuff.

200 Watts
Universal 85-264VAC Input Universal Input
High Efficiency
Regulated Outputs
3000V Isolation
Built in EMI Filter
Power Factor Correction
Unit measures 3.9”W x 7.83”L x 1.97”H
SP-200-24             24 VDC 8.4           more power supply info   >

NBC Filter Enclosure - All Steel Construction 

Every Filter Science unit is constructed of heavy duty, 16 gauge steel.  Our laser cutting, metal stamping and forming are all done in Phoenix, Arizona.  We run an extensive line of modern CNC machines and press brakes to ensure exacting dimensions and quality.  The quality of our steel parts is ensured by state-of-the-art laser measurement.

We utilize a paperless workflow system where the entire fabrication, assembly process and assembly instructions are accessed on-line to ensure the most up-to-date, accurate information.  A shop floor computerized control system ensures a smooth flow of material and labor.

Filter Science has taken pride in manufacturing a unit which is unobtrusive in your daily life.  We understand that in order to be ready for a terrorist event, your unit may have to become a daily part of your décor.  We tried hard to take this into consideration in our initial design.  

In many areas of construction, we use 304 Stainless Steel or 6063T6 Aluminum to assure your Nuclear, Biological and Chemical filter will be there when you need it.  Stainless Steel gives you the tensile strength and corrosion resistance required of difficult environments, along with the modern look of stability.  From the harsh salt air of the coasts, to the humidly of the south, and the cold of the northern states – our biological warfare and chemcial warfare unit has been built with you in mind.

Hardware, Controls and Handles
Every aspect of your Filter Science unit has undergone diligent and rigorous testing before it has become part of our family of products.    The hardware and controls were no exception.  Before a part we did not manufacture, became part of a Filter Science unit, it had to fulfill our specifications and pass, or surpass our tests.

Air Control Valves

The NBC 450 is equipped with two 6 inch air intakes and each of these intakes has its own Stainless Steel valve.  One valve will bring outside air into the filter and the other will bring inside room air into the filter.  Each valve can be easily operated between fully open and fully closed.  This added safety feature on the NBC 450 allows the user to select between outside air, inside air, or an infinite combination of the two.

Positive Position Air Control Valves Handles

Each valve handle is made of glass-fiber reinforced polyamide (PA) technopolymer.  It is resistant to solvents, oils, grease and other chemical agents.   It has a black oxide steel boss with a H7 standard tolerance reamed hole for a sure fit to the 6063T6 aluminum valve shaft.

Operation of the air control valve in your unit is performed smoothly thanks to the heavy-duty arm of the lever, while the enlarged and sunken semi-spherical end offers a comfortable support for the palm of the hand and an effective grip.    Our handle has two 180 degree holes for the positive control ball and spring click positioning operation.  This gives you the assurance this valve is going to stay in position in the event of a Nuclear, Biological or Chemical attack.

Positive Position Hinges
The hinges on your unit are made of die cast zinc, with a black urethane enamel finish. The hinge shaft is carbon steel.  Each hinge has 2 o-rings and 2 die-cast steel bushings.  The tensile strength of these hinges is excellent with a radial average ultimate load of 1550 pounds and an axial load of 450 pounds.

These hinges are constant torque friction hinges which will hold the filter door open without secondary mechanical support.  In other words – if you need to change a filter – the door will stay in whatever convenient position you place it.  Remember, it’s the little things that count in an emergency, and we pave the way for you.

Convenient Carrying Handles
Each unit handle is made of glass-fiber reinforced polyamide (PA) technopolymer.  It is resistant to solvents, oils, grease and other chemical agents.  Each handle utilizes brass inserts for secure attachment to the filter cabinet.  Tensile stress and impact strength of 448 pounds come from breaking tests carried out under stringent test conditions.  So what does all that mean for your filter – it means this handle can absorb very strong shocks and thanks to its special technopolymer – it will never break.  If you need to move your filter in an emergency, the last thing you need is a broken handle.  The engineers at Filter Science have made sure that will never happen.

Steel Cabinet Latches
The latches of a Nuclear, Biological and Chemical filter are central to its proper function.  Ours are case hardened, 12L14 steel with a zinc alloy plate, plus a sealer.  The latching spring is 1064 steel with a black powder coat.  All rivets on this latch are 430 Stainless Steel.

The ability of this latch to keep the proper torque and tensional control over your filter latching system surpasses even our high standards.

Stainless Steel Grills

Filter Science utilizes a heavy 304 Stainless Steel for all its vent openings.  This steel is plasma cut for stand-off accuracy with a brushed steel finish for a great look.

Flange Adapters

Each Flange Adapter on the Filter Science unit is 18 gauge steel with an electrostatic deposition powder coat finish to match the cabinet.  This heavy gauge steel adapter provides a security level between you and your outside connection.  It is clearly marked for accuracy and convenience.

Circuit Breakers
Every Filter Science unit is protected by two circuit breakers.  Fuses simply won’t do if you are trying to re-establish power in an emergency.  Each of these circuit breakers is a simple “push to reset”.  One is for the AC side and the other for the DC side.

DC Battery Connections
Conveniently located on each unit are two Nylon insulated connection posts for connecting your DC power in an emergency - red for connection to the positive battery terminal and black for connection to the negative battery terminal.  Simply flip the on/off switch to DC power and you will be operating on DC power. 

On/Off and Variable Speed Control
In the event of an explosive terrorist attack, it is common for a large amount of dust and debris to fill the air.  Remember the dust and debris in the air after 911?  While your Filter Science NBC filter will handle far more of this debris than any other filter, it too can become “loaded” with these airborne particles.  As this occurs, you will need more fan power to overcome the clogging effect of this debris.  The engineers at Filter Science have provided you with this life saving option. With our variable speed control and powerful blower, you can increase your blower power to maintain the same amount of clean airflow.

Quick Change Filter Design
In a long period emergency, you may wish to change one or more of your filters.  The original design engineers at Filter Science gave this option a high priority.  The result is our patented split cabinet design, which allows you to change your Nuclear Grade Particulate Filter, your Carbon Filter or your Prefilter, in less than 10 seconds.  Example:  In the paragraph above we describe the dust laden air which can accompany a terrorist attack. Most of this debris will be captured in our four layer progressive density prefilter which has been designed to capture 85 % of the large airborne particles and protect the Nuclear Grade, High Density, Particilate filter and the Carbon filter.  With our split cabinet design and double gasket construction, you can safely change this prefilter in just a few seconds.  This will restore full airflow to your filter, without increasing air speed, should you wish to utilize this option. Your nuclear warfare, biological warfare and chemcial warfare filter will be back in business.

Double Gasket Construction
One of the keys to a well designed Nuclear, Biological and Chemical Filtration system is to make sure there is no air leakage.  With this in mind, we have engineered a double gasket protection system, and utilized it on all our units.  Each filter is protected with its own gasket.  In addition, each individual cabinet in our filter is protected by an additional gasket.  When you close the door of a Filter Science unit, both gaskets seal simultaneously.

Puzzle Cut Gaskets
In addition, each of our gaskets is puzzle cut, instead of simply cutting them on a straight 45 degree angle.  This puzzle cut enhances the air retention properties of the gasket and greatly reduces leakage.  This attention to detail, gives you and your family the assurance of protection you need in a Nuclear Warfare, Biological Warfare or Chemical Warfare emergency.

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