1. Preparation work before installation
In order to prevent the high efficiency filter from being contaminated, the open box inspection and installation must be carried out after the installation of the air cleaning system, the air conditioner, the high efficiency filter box, the air duct and the clean room have been cleaned, after the test run of every single device of the air conditioning system and after the amount of dust blown out of the air duct has been stabilised.
Before installation, check the straightness of the filter frame or the end face of the side port, the allowable deviation of the end face flatness should not be more than 1mm each, if the end face flatness exceeds the allowable deviation, only the frame end face of the filter installation is allowed to be modified or adjusted, and the outer frame of the filter itself is not allowed to be modified, otherwise the filter media or the sealing part of the filter will be damaged and the filtration effect will be reduced.
2. Installation requirements
When installing the high efficiency filter, ensure that the direction of airflow is consistent with the direction of the arrow mark on the outer frame. When the high efficiency filter assembled with corrugated plate is installed vertically, the corrugated plate must be vertical to the ground and must not be reversed.
High efficiency filter and the frame of assembled high efficiency filter, its sealing generally adopts two kinds of top tightening method and pressure tightening method. For cleanliness requirements of more than 5 levels of clean system, some use the knife frame type high efficiency filter liquid tank sealing device.
(1) Top tightening method and pressure tightening method of installation: the characteristics of the top tightening method, can be installed and replaced in the clean room high efficiency filter.
When installing, the filter should be held lightly and not contaminated, and should not be knocked or hit with tools. It is strictly forbidden to touch the filter paper with hands or tools to prevent damage to the filter material and sealant.
The seal between the filter and the frame is generally made of closed-cell sponge rubber sheet or neoprene sheet, and it is also sealed with silicone rubber coating. The thickness of the sealing gasket is often 6~8mm, positioned and pasted on the filter frame, and the compression rate after installation should be 25%~30%. The splicing method of sealing gaskets is the same as the splicing method of flange connection gaskets of air clean system ducts, i.e. trapezoidal or vertebral splicing is used.
DOP high efficiency air supply outlet
For the sealing of the filter and the frame, do not block the eyelet on the ring cavity when using the double ring seal. Both the double ring seal and the negative pressure seal must be kept clear of the negative pressure duct.. In order to improve the "seal guide" combined with the sealing effect, the ring cavity on the opening, such as the design does not require, the side length of 484mm below the filter, an edge to open a hole, it is appropriate to open a hole in 1 ~ 2 sides; side length of 630mm below the filter, an edge to open a hole, should be opened in two sides; side length of 630mm above the filter, an edge to open two holes; side length of 630mm for filters with a side length of 630mm or more, two holes should be opened on one side and on both sides.
If the installed filter needs to be moved, lift the filter up a little and then gently lower it into the slot. The installed filter should not be pushed hard to avoid overflowing of liquid or damage to the filter. When replacing the filter, the pallet should be prepared in advance, and when the filter knife frame is removed from the liquid tank, the pallet should be placed under the filter immediately to avoid the liquid attached to the knife frame from dripping into the clean room or polluting the installed filter.
When we finish the installation of the high efficiency filter, we also have to leak test the high efficiency filter. The filtration efficiency of the high efficiency filter itself is generally tested by the manufacturer, and the filter filtration efficiency test report is generally attached to the factory. For enterprises, the purpose of leak detection is to check the sealing of the high-efficiency filter and its connection parts with the installation frame, etc., to discover possible defects in the high-efficiency filter itself and in the installation in time and take corresponding remedial measures to ensure the cleanliness of the area.