Author - sannyzhao

05 Nov

Why do we need a cleanroom?

Why do we need a cleanroom? The Cleanroom The purpose of every cleanroom is to control an environment by limiting the presence of sub-micron particles and modifying inadequate environmental conditions. The level to which the environment is controlled is what separates one cleanroom from another. For instance, a Class 10 cleanroom has 10 particles of size 0.5 microns per cubic foot of air, where as a Class 100,000 clean room has 100,000 particles of size 0.5 micron per cubic foot of [...]

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03 Nov

Air Filter’s Air Flow Rates In Different Cleanliness

Air Filter’s Air Flow Rates In Different Cleanliness For detailed information on Air Flow Rates, contact a HAOAIR specialists to get specific answers to your project. Class per ISO 14644 (Old FS 209 e) Average Airflow (Across Entire Room) Air Changes (per hour) ISO 8 (Class 100,000) 0.005 – 0.041 m/sec (1 – 8 ft/min) 5 – 48 ISO 7 (Class 10,000) 0.051 – 0.076 m/sec (10 – 15 ft/min) 60 – 90 ISO 6 (Class 1,000) 0.127 – 0.203 m/sec (25 – 40 ft/min) 150 – 240 ISO 5 (Class 100) 0.203 – 0.406 m/sec (40 – 80 ft/min) 240 – 480 ISO 4 [...]

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29 Oct

ULPA Filters Introduction of HaoAir Tech

ULPA Filters Introduction of HaoAir Tech ULPA stands for Ultra Low Particulate Air. Growing market demand from advanced science and technology led to development of ULPA filters which provide a minimum of 99.999% efficiency (0.001% maximum penetration) on 0.3 micron particles for achieving better cleanliness classes and cleaner working environments. These are used for ultracleanrooms, where contamination levels have to be controlled at levels better than that which can be achieved with conventional HEPA filters. Boron free ULPA filters of 99.9997% [...]

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26 Oct

HEPA Filters Instruction Of HaoAir Tech

HEPA Filters Instruction Of HaoAir Tech HEPA filters stands for High Efficiency Particulate Air. The HEPA filters work on diffusion principle to remove particulate matter. And are extremely important for maintaining contamination control. These filter particles as small as 0.3 µm (microns) with a 99.97% minimum particle-collective efficiency. This is remarkable considering that the outside air we breathe may contain up to 5 million suspended particles of dust, smog, and pollen in one cubic foot. These filters typically use glass fiber [...]

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21 Oct

Filtration Principles Of Air Filter

Filtration Principles Filtration of particles relies on four main principles: (1) inertial impaction, (2)interception, (3) diffusion, and (4) electrostatic attraction. The first three of these mechanisms apply mainly to mechanical filters and are influenced by particle size.  inertial impaction 1) Impaction occurs when a particle traveling in the air stream deviates from the air stream (due to particle inertia) and collides with a fiber. Generally impaction filters can only satisfactorily collect particles above 10 microns in size and therefore are used only [...]

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18 Oct

Filtration System Of HaoAir Tech’s Air Filters

Filtration System Of HaoAir Tech’s Air Filters Any air introduced in the controlled zone needs to be filtered. Air filtration involves the separation of “particles” from airstreams. Their removal method is almost as diverse as the size ranges of the particulates generated. Understanding separation techniques requires an exact definition of what particles are. As particles become very small, they cease to behave so much like particles as they do gas phase molecules. It is difficult to tell whether such small [...]

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16 Oct

What differentiates cleanroom HVAC to conventional systems?

What differentiates cleanroom HVAC to conventional systems? Cleanroom HVAC design encompasses much more than conventional temperature and humidity control. Typical office building air contains from 500,000 to 1,000,000 particles (0.5 microns or larger) per cubic foot of air. A Class 100 clean room is designed to never allow more than 100 particles (0.5 microns or larger) per cubic foot of air. Class 1000 and Class 10,000 clean rooms are designed to limit particles to 1000 and 10,000 respectively. A clean [...]

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14 Oct

Personal Protective Equipment In Clean Room

Personal Protective Equipment In Clean Room Various tasks in the cleanroom carry various requirements for using personal protective equipment. The purpose of these rules is not to hinder your work but to keep you and those around you safe. Proper PPE will greatly reduce the risk of an injury should you or someone around you cause a 29 chemical accident. Each chemical bench has specific PPE requirements for anyone working there. These requirements also apply to someone observing work at [...]

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10 Oct

Fresh Chemicals Storage and Transporting

Fresh Chemicals Storage and Transporting Bottles of fresh chemicals are to be stored in one of the two chemical pass-through cabinets or in the small cabinets under the proper benches. The chemical bottles should be wiped down prior to being placed in the pass-through from the outside hallway to minimize particulates. Bottles of fresh acid or caustic chemicals other than developer should be transported from the cabinet to the hoods using a rubber bucket and one heavy nitrile glove. This [...]

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08 Oct

General Clean room Regulations For Clean Room

General Clean room Regulations Below is a list of general clean room regulations recommended as a minimum for the successful operation of a cleanroom. All professional cleaning personnel should be aware and follow these regulations at all times. Regulations All personal items such as keys, watches, rings, matches, lighters and cigarettes should be stored in the personal locker outside the gowning room. Valuable personal Items such as wallets may be permitted in the cleanroom provided they are NEVER removed from beneath the cleanroom [...]

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