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The Clean Room Fogger, CRF-2, is used in smoke studies using DI Water or WFI water to produce a pure fog to visualize airflow and turbulence in Semiconductor Clean Rooms and Pharmaceutical ISO5, ISO7, ISO9 suites. Di Water Foggers are also called smoke generators, which can support USP 797 Pharmaceutical In-Situ Airflow Analysis.

Clean Room Fogger, CRF-2, 9cfm for 60 minutes operation - http://bjzbkj.com/zxxj.html

The CRF-2, Clean Room Fogger will satisfy many applications as well as clean rooms. This small, easy to use tool will introduce you to the benefits of using a DI Water fog for visualizing airflow and turbulence in controlled contamination areas.

Clean Room Fogger, CRF-2 Features - Click here for http://bjzbkj.com/zxxj.html Video

• Nine (9) ultrasonic transducers producing 9cfm of fog for 60 minutes
• Easy Fill Water Port, Water Level Fill Indicator is on left panel
• Clean Room Fogger Carry Handle for operator convenience
• Polypropylene enclosure to maintain clean and particulate free enclosure
• Transducer life: 5,000 hours
• Optional Fog Curtain Wand that plugs into Fog Tube
• Optional Remote Power Cable operates fogger inside a Barrier Isolator or behind a closed wall
• 2" Diameter (50.8 mm) hose that telescopes from 28" (71.1 cm) to 82" (208 cm)
• Fog Tube and Power Supply (120VAC or 220VAC) included with a ten (10) meter cable
• Easy to use with fast set up and instant On/Off operation
• Optional Rolling Carry Case for the Clean Room Fogger
• Paperless operation with the instructions and applications labeled on the right side of the clean room fogger

Clean Room Fogger, Pharmaceutical Suites, Semiconductor Clean Rooms

• Airflow balancing
• Leak detection in ducts
• Clean room laminar flow tests
• Wet bench exhaust optimization
• Personal safety exhaust verification
• Chemical process equipment ventilation tests
• Pressure balancing between rooms and spaces
• Visualization of airflow patterns and turbulence

	OPTIONAL Carrying Case

Model CRF-2, CRF Specifications

Dimensions	10” x 9” x 11” (25.4 cm x 22.9 cm x 27.9 cm)
Weight (including DI Water of WFI Water)	17 pounds, 7.7 kG
Liquid Volume	1 gallon, 3.7 liters, converts 55ml of water per minute producing the highest fog volume of all DI Water Foggers today
Fogger Operation, Visual Fog Distance, Fog (CFM) Volume	Model CRF-2 ~ 60 minutes continuous use, 7-8 feet visual airflow distance, 8-9cfm fog volume; Model CRF ~ 60 minutes continuous use, 6-7 feet visual airflow distance, 6cfm fog volume
Power	Input; 120 VAC or 220VAC power supply; output 48 Vac, 200W

Clean Room Fogger INFORMATION

The Clean Room Fogger is used in smoke studies and often called a smoke generator. Pure fog is the output, not smoke! Operating instructions are noted on the right panel of enclosure.

Theory of Operation: Ultrasonic cavitation using DI water or Pharmaceutical WFI Water. Use of any other liquids or chemicals will void the warranty.

 

The transducer life is ~5000 hours, which is protected from electrical damage when water level is too low. The water level sensor will interrupt the input voltage to the transducer module, should the water level drop to a low level to . This ensures long life and reliability.

 

Notes:

 

1. The clean room fog generated by this device contains microscopic droplets of DI water. AVOID USING IN IMMEDIATE VICINITY OF ELECTRICAL APPLIANCES, WATER SENSITIVE PRODUCTS AND EQUIPMENT.
2. The fan will operate with no water in the reservoir with the power switch in the ON position. This will aid in drying when the chamber is drained.
3. To increase drain plug tension, remove the plug, rotate clockwise (CW) the front latch while holding the rear metal disk.
4. The clean room fogger is intended to be used on a flat surface, on its feet. Tipping the fogger with water in the reservoir will damage the fogger. DO NOT OVERFILL OR TIP THE FOGGER.

Portable Fogger, Battery Operated, DI Water Fogger, 4cfm - http://www.ati17.com/product.html#

Notes:

1. The fog generated by this device contains microscopic droplets of DI water. AVOID USING IN
   IMMEDIATE VICINITY OF ELECTRICAL APPLIANCES, WATER SENSITIVE PRODUCTS AND EQUIPMENT.

CO2 Fogger, 3cfm - http://www.ati17.com/product.html#

The CO2 Fogger is used to visualize airflow, turbulence and velocity patterns in your clean rooms. The fog is produced using a 1 lb. block of dry ice placed in a DI water reservoir which has been heated. The Model 5 CO2 Smoke Generator and Clean Room Fogger is NOT an “On Demand” fogger. Once the Fog process has started, it will continue to produce fog, 3 cfm at first, then decreasing down to 0 cfm when the dry ice has been consumed. During operation it can be unplugged and carried to the area to be tested. The Optional CO2 Fogger wand is designed to allow the user to select the type of fog dispersed from the wand, e.g., jet fog (left photo) or curtain fog (right photo). Simply sliding the end of the wand will select the desired fog pattern.

Applications

• Cleanroom laminar flow tests
• Airflow balancing
• Wet bench exhaust optimization
• Chemical process equipment ventilation tests
• Personnel safety exhaust verification
• Pressure balancing between rooms and spaces
• Leak detection in ducts

 

CO2 Vapor Fogger Specifications

Optional input voltages of 100VAC, 240VAC, 50/60Hz

Fogger Technology

The three types of foggers manufactured for use in the semiconductor and pharmaceutical industry are described below.

Ultrapure LN2 Fogger: This type of smoke generator or clean room fogger is used in smoke studies to provide the highest volume, density and purity of fog. Purity is created by bringing the water to a boil, creating a vapor, while simultaneously using gravity to remove the residual mass from the vapor. This process removes any bacterial agents and residual particulate matter from the vapor. The pure vapor is then passed over an LN2 bath, which naturally boils at room temperature. The water molecules quickly attach to the nitrogen molecules (quenching process), creating a nominal 3um fog droplet. The volume of water and nitrogen molecules that combine is extremely high in quantity, creating a dense, high volume, ultrapure fog output with exit temperatures of about 80 degrees F with an exit pressure of less than 0.5 lbs, so as not to disturb the surrounding airflow. The fog is ultrapure leaving minimal, if any, trace particles behind. It evaporates to its gaseous hydrogen, oxygen and nitrogen components, which are natural to the Cleanroom environment. The high density of the fog increases the duration and travel distance of the fog. This fogger can be used in a Class 1 - 10,000 Cleanroom environment.

Clean Room Fogger, CRF-2, DI Water Fogger: This type of fogger has less fog density (less capability to visualize airflow) than the UltraPure Fogger described above, but more density than the CO2 fogger described below. Model CRF-2 produces the highest volume of fog of all DI Water Foggers at 9 cfm for 60 minutes, or 540 cf of fog over a 60 minute period. The DI water fog is generated by atomizing DI water into water droplets, which are nominally 3-10um in size. The water droplets can contain residual particulate matter remaining in the DI water, but this would be very trace amounts. If the facility manager operates a class 10 to Class 10000 Clean room, the use of a DI Water Fogger poses no problem. However, Cleanroom Engineers who manage facilities operating at Class 1 to Class 10 performance may desire to use an M2001 UltraPure Fogger. Although some DI Water foggers are described as ultrapure, unless the DI water is vaporized to remove bacterial agents and residual particulate matter, the fog is not ultrapure. The 3lb output pressure of a DI water fogger can add disturbance to the airflow. Minimize this by using the optional Fog Curtain Wand, which reduces output pressure while spreading the fog pattern wide and point the fog in the direction of the airflow or at 90 degrees to the airflow. The temperature output is typically less than the surrounding room temperature, thus a fog generated from the atomized water droplets will sink momentarily in a typical 70 degree room temperature.

CO2 Fogger: This type of smoke generator or CO2 Fogger is designed for low volume, non-process critical applications such as bench airflow testing. The fog is created using CO2 ice as the fogging agent. The fog contains elements of the CO2 and the user must determine if the residual CO2 components are acceptable in a process environment operating Class 100 to Class 10,000. The 3-5lb output pressure of a CO2 fogger also distorts the airflow patterns, thus adding to the turbulence. The output starts at about 6cfm and slowly decreases to 0 CFM in about 6-8 minutes for an average of 3cfm.

Smoke Sticks

Smoke Sticks are used in smoke studies in some Pharmaceutical Clean Rooms around the world. Below is a discussion on the use of smoke sticks used to visualize airflow and turbulence?

A smoke stick is often used visualize airflow turbulence, but smoke sticks are filled with particulates and chemicals. Smoke is created using chemical reactions; thus the smoke is SPUTTERING (sputter) or popping out of the smoke stick in a non-consistent pattern with velocity, but little volume. It is a particle smoke, compared to a visible, pure water based fog, thus smoke sticks are a contaminating smoke. The smoke stick generates an inconsistent flow or pattern of smoke, but it is low cost, which is why some managers allow use of smoke sticks in their Pharmaceutical clean rooms. Clean up after use of Smoke Sticks is time consuming and costly in labor.

Compare a smoke stick to a Clean Room Fogger or an UltraPure LN2 fogger, both which produce a constant volume of fog with a consistent fog output and pure fog. Di Water foggers produce a consistent flow of visible water vapor, which enters the airflow to visualize the airflow patterns and turbulence, then begins to evaporate, returning back to the hydrogen, oxygen and nitrogen components that we breathe. No particulate contamination, no chemical contamination. Water based foggers produce a constant volume of fog at a constant rate, which provides consistent visualization of airflow patterns and turbulence. The Smoke Stick has to be waved around to see what kind of airflow pattern there is, while a Di Water fogger is simply placed in position and produces a flow of fog that can be directed 360 degrees to easily describe the airflow patterns and turbulence. In addition, tubes are now available to create "fog curtains", or a wall of fog, which smoke sticks can not produce.

How many smoke sticks are used per smoke cycle? How much labor is needed to clean up after smoke stick use. Do you need to Clean all the walls where the smoke stick was used. How did the chemical particulates and particles affect the process area? These are critical questions for a pharmaceutical manager. Did the contaminating particles and chemicals get into the drug process?

How much labor is used to cleanup after smoke stick use and if the cleanup did not get every chemical particle, then some smoke chemical material is added to the Pharma process or trapped in a filter somewhere, until it escapes into the Pharma process. That is a quality control issue for that company using smoke sticks.

The low labor cost of using smoke sticks is the reason facility managers may use smoke sticks, but are the chemical and particulate effects to the pharma process being analyzed? Non-contaminating fog does not emit particulates, requires less labor and does not contribute any unwanted chemicals to the Pharma process. A Di Water Fogger provides these advantages in fog volume, fog consistency and fog purity, which easily outweighs the low cost of smoke sticks, the high cost of labor for cleanup and the detrimental affects to quality control!

Smoke Sticks - quality side of the drug product: The smoke chemicals are not of the same chemistry as the drug product, thus smoke chemicals and particulates could migrate into the drug process. There is no guarantee the cleaning process removed all the unwanted particulates and chemicals, from for example, a glove box or isolation box. The chemicals and particulates eventually migrate to the air filter system, which is not 100% effective. If this is the case, the quality and purity of the drug process is affected. Drug quality is the basis of product credibility, which is a valuable asset in customer relations.

Smoke Sticks - labor side of the drug product: The smoke is generated by a chemical reaction, which causes the smoke to sputter into the environment. The smoke is inconsistent in volume, thus the smoke stick is unpredictable for airflow visualization. The chemicals migrate to equipment and walls, which then must be cleaned, and requires an added labor cost. The use of Smoke sticks generates an inefficient smoke, not a consistent fog.

Our Clean Room Fogger is used in nearly all smoke studies using Di Water or WFI water producing micro fog droplets that evaporate back into hydrogen and oxygen, the same air we breathe. No clean up is required, at all. No additional time delays and clean up labor is not required. The fog is consistent in volume and constant in output to describe the airflow patterns and turbulence. These are equipment, quality and application concerns to consider when the need for airflow visualization is considered.