Installation requirements for high-efficiency filters in dust-free workshops? - Frequently Asked Questions
Installation requirements for high-efficiency filters in dust-free workshops
The high-efficiency filter in the dust-free pharmaceutical cleanroom is an important part of the air cleaning system. The filter material used is ultra-fine glass fiber and ultra-fine asbestos fiber. Its installation is the focus of the installation of the entire system; in order to prevent the high-efficiency filter from being polluted , Before unpacking inspection to prepare for installation, empty...
Text label: dust-free pharmaceutical cleanroom filter, high-efficiency filter installation requirements
Installation requirements for high efficiency filters in clean workshops
The high-efficiency filter in the dust-free pharmaceutical cleanroom is an important part of the air cleaning system. The filter material used is ultra-fine glass fiber and ultra-fine asbestos fiber. Its installation is the focus of the installation of the entire system; in order to prevent the high-efficiency filter from being polluted , Before unpacking inspection and preparing for installation, the air cleaning system must be installed, the air conditioner, high-efficiency filter box, air duct and clean room have been cleaned, and the amount of dust blown out of the air duct after the trial operation of each individual equipment of the air conditioning system and the air duct is stable; installation; Before checking the straightness of the filter frame or the end face of the edge port, the allowable deviation of the end face flatness should not be greater than 1mm. If the end face flatness exceeds the allowable deviation, only the end face of the frame where the filter is installed is allowed to be modified or adjusted, and the filter is not allowed to be modified. The outer frame of the filter itself, otherwise it will damage the filter material or sealing part in the filter and reduce the filtering effect.
When the high-efficiency filter is unpacked, inspected and installed, it must be installed in the air cleaning system, qualified for debugging, and run for more than 12 hours to blow off the dust in the system, air conditioners, high-efficiency filter boxes, air ducts and clean rooms After cleaning, trial operation of each individual equipment of the air conditioning system, and the amount of dust blown out of the air duct is stable, it can be carried out to avoid contamination of the high-efficiency filter; if the filter frame size is found to be wrong or uneven during installation, only the frame can be modified. Make it meet the requirements to ensure tight connection. Do not modify the filter, and do not force the connection because the frame is not flat, which will cause the filter frame to be damaged. Make sure that the airflow direction is consistent with the direction of the arrow mark on the outer frame, and the filter assembled with corrugated plate When the filter is installed vertically, the corrugated board must be vertical to the ground and must not be reversed; the connection of the filter box and the connection between the filter box and the air duct are the same as the connection method of the air duct. For mouth connection, riveting is used for plates with a thickness greater than 1.2mm. The corner bite and joint angle bite can be used in the bite form. Try to avoid the snap-type bite. The disadvantage of the snap-type bite is that the insertion part is not tight and air leakage If the amount is serious, the splicing plate can use a single flat bite; for air-conditioning systems with strict requirements on cleanliness, a high-efficiency filter should be used in front of the air supply to eliminate fine dust in the air. Filters are used in series to extend their life. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for dust-free workshops and dust-free workshops.
High-efficiency filter and the frame for assembling high-efficiency filter, the sealing generally adopts two methods: top-tight method and compression method. For the 100-level and 10-level clean systems with strict cleanliness requirements, some use knife rack type high-efficiency filter The sealing device of the liquid tank of the filter; the sealing of the filter and the frame is generally made of closed-cell sponge rubber plate or neoprene rubber plate, and silicone rubber is also used for sealing. The thickness of the sealing gasket is usually 6-8mm, and it is positioned on the filter frame. , the compression rate after installation should be 25%-30%, the splicing method of the sealing gasket is the same as the splicing method of the air duct connection flange gasket of the air cleaning system, using trapezoidal splicing; the sealing of the filter and the frame, when using double-ring sealing , Do not block the holes on the ring cavity, both the double ring seal and the negative pressure seal must keep the negative pressure pipeline unobstructed. The liquid tank seal overcomes the shortcomings of the compression valve due to the poor flatness of the end face of the frame, which makes the filter seal not tight, the gasket is aging and leaking, and the replacement and disassembly cycle is long. During the installation process, the connection of the skeleton components should be as smooth as possible. , After the frame liquid tank is connected, use silicone rubber or epoxy resin glue and other sealants to seal all joints and gaps, heat the sealing liquid in a water bath to about 80 °C to melt, and quickly pour it into the tank to reach the design depth. After the sealing liquid has condensed, the high-efficiency filter can be installed.
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