Have a certain understanding of it, know the bags into the bag filter is the biggest characteristic of installation, replacement and testing filters are in PVC bags (or high-temperature bag) under the protection of FFU fan filter unit, no contact with the outside air, not only to ensure the safety of personnel and the environment, also let the replacement process more convenient. In fact, in addition to the use of a safe and convenient to replace the bag filter technology, the overall strong and air tightness is also very commendable. The bags into the bag out of the nuclear industry standard production, mainly based on national filter such as: the United States ASME N509 (nuclear power plant air purification equipment and components), ASME N510 (nuclear air treatment system testing), Germany DIN (25496 nuclear facilities with air components). The general welding equipment for stainless steel, between the hermetic isolation valve is connected with the box with flange connection, usually neoprene neoprene gasket and flange gasket seal, under the special needs (such as high risk, high pathogenic environment) equipment can resist earthquake. The box with the hermetic isolation valve using the same standard of sealing, gas tight isolation valve in the closed condition, the standard of 2500 Pa at a constant external pressure under pressure decay leak test, the German standards of 2000 Pa at a constant external pressure, allowable leakage rate is less than 10 l/ (hm2). The seal between the filter unit and the box frame has two forms, in North America by liquid (gel) seal, a circle of special zone around the gel filtration unit, when the filter unit into the filter box, the box frame completely into the internal gel so as to ensure the sealing between the two; and in Europe. The air bag is arranged between the filter unit and the filter element into the box frame, after inflating the balloon, then the airtight detection using professional equipment, to ensure the full seal.
Today, we talk about the installation and replacement of bags with high efficiency filters:
The initial installation of the filter, the new filter unit along the track directly into the filter box lock, then the PVC bag is installed on a flange with special design (Ribbed Bagging Ring) port, and use of the safety belt (Security Strap) with PVC to ensure the sealing between bag and flange, the PVC bag folded, closed the access door, so PVC bag and a filtering unit together in closed bags into the bags out of the box body.
Replace the filter unit, the staff open the access door, stretching his hands PVC Bag Gloves (Filter Handling GloveSleeve), release of the locking device filter unit, the used filter unit into the PVC bag, and then include the filtering unit in the middle part of the bag tightly cut, so that the filter unit abandoned through the PVC bag removed from the box. Then the new filter element into the new PVC bags, PVC bags and then set the new on the flange port truss, remove the flange on the remnants of the pocket, into a new
Bag Gloves (Bag Stub Removal Glove Sleeve), the truss will be the cut, then a good volume of new bags, close the access door and pressed, to complete all of the replacement process.
Installation and replacement of the entire process, in addition to the filter unit was first installed, all the dirty filter unit removed and a new filter unit are passed into the PVC bag, to ensure isolation of the entire system, can not directly change after fumigation, save a lot of time, and more safe and reliable. At the same time, because of the way of replacing the filter element, this kind of filtering equipment is called the image of the bag into the bag out (BIBO).
consulting