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|Home >> PRODUCTS >> Fluid Filter Element >> Filter Bags
Bag Filter Installation Instructions

Operator's Manual

-Bag Filter Installation Instructions-

Warning: Filters and filtration systems can be seriously hazardous if improperly operated. Make sure to read this Manual and understand all procedures thoroughly prior to any operation. Operators MUST wear appropriate protective gears at ALL time.


Filterek liquid bag filters are designed for liquid filtration and purification purposes only. First time end users are strongly encouraged to consult with local Filterek authorized distributor for filter media compatibilities, including but not limited to chemical compatibilities, temperature range, system pressure, liquid flow rate, specific gravity and viscosities, etc. Improper use may result in performance failure, operator body injuries or even death.

1. Bag Filter Installation


1.1 Flow Direction: Unlike the filtration concept of cartridge filters, the correct flow direction of bag filters is from inside out, i.e. Unfiltered liquid flow into the bag filter, go through the filter media, filtered liquid comes out the bag filter and goes downstream, Reverse flow will result in immediate operational failure.


1.2 Basket Support: Bag filters must be mechanically supported by metal baskets. Bag filters are NOT designed to withstand system pressure by themselves. Without basket support or with improper basket support, bag filters will rupture when pressure is applied. Prior to bag installation, make sure the support basket is in place.


At installation, make sure the bag bottom is fully seated into the support basket. Suspended bag filters may rupture when pressure is applied. Use Filterek genuine bag filter installer to gently push the bag downward so that the bag bottom reaches the bottom of the basket.


1.3 Filter Top Seal: Signature and patent SDS seal ring is highly effective in preventing liquid bypass. The traditional steel rings are also viable seal ring alternatives, however sealing effectiveness is somewhat compromised. Bag filters topped with improper seal rings, which can not guarantee bypass free operations, will lead to performance failures.


Make sure the seal ring is properly seated into the filter housing collar, otherwise bypass may take place during operation.


 2. Bag Filter Replacement


   2.1 Change-out Pressure Differential: The recommended bag filter change-out pressure differential across the bag media is 0.10 MPa (15PSI). Continuing beyond this point will result not only in rapid flow rate reduction and contaminant unloading, but also increase the risk of filter rupture. The maximum differential pressure allowed is 0.23 MPa (35PSI).


   2.2 Removal of Used Filter: During operation, the filter media may be embedded into perforated holes on the basket under excessive pressure, making it difficult to remove the bag filter. When this happens, DO NOT use excessive force to pull the bag, as it will break the ultrasonic welding line and detach the seal ring from the bag body. To safely remove the bag, shake the basket rapidly and then use a spine motion to separate the bag from the basket, slowly pull the use bag out.


3. Bag Filter Replacement Procedure

  The following operating procedure must be strictly observed for safe operation.


      3.1  System Off: Turn off and lock pump, close inlet and outlet valves.

      3.2  Pressure Release: To prevent injury, make sure that the nozzle is point at a safe direction. Open vent valve slowly to depressurize the housing.

      3.3  Open Cover: Must make sure that the interior pressure is zero before opening the cover.

      3.4  Discard Used Bag Filter.

      3.5  Basket Inspection: Inspect for roundness and rim conditions. The entire upper rim of basket must seat evenly on retaining collar. Warning: operating without basket and / or installing basket incorrectly will cause major filter failure.

      3.6  Install New Bag Filter: Filter bags must be inserted into the basket. Cartridges must be seated properly between seal cups.

      3.7 Gasket Inspection: Choose compatible gasket material for specified operation. Replace worn gasket immediately with genuine Filterek gaskets.

      3.8  Close Cover: Pay special attention when close housing cover. Make sure gasket is not twisted and / or out of groove. Torque tightening eye nuts in a sequence of 180°to each other.

      3.9  Close Vent Valve.

      3.10  Turn Pump on.

      3.11  Open Inlet Valve: Open valve slowly to observe leaks. Shall leakage take place, shut off inlet valve and start over from Item 3.8.

      3.12  Open Outlet Valve


 4.  Bag Filter Reuse


4.1  Bag filters are disposable in nature. Under normal circumstances, reuse and repeat use are not recommended. Reuse will compromise filter media integrity, resulting not only in performance failure, but also cross contamination.


5.  Bag Filter Storage


 5.1  Bag filters are seal packed in heavy duty carton boxes. Unused bag filters must be re-packed into the plastic bags to keep them from dust and humility.


 5.2  Following the storage instructions printed on the carton box. DO NOT over stack as excessive weight will damage bag filters. Avoid prolonged storage.


6.  Used Bag Filter Disposal


   6.1  Maximum caution is essential when remove bag filters used to filter health hazardous liquid. Operators must ware appropriate gears at all time.


   6.2   Dispose used bag filters in accordance with applicable government regulations and laws.


7.  Need to Knows


   7.1  Differential Pressure: It is important to check pressure differential regularly during operation. Operating above the recommended 0.10 MPa(15PSI) change out pressure differential will negatively affect flow rate, reduce production efficiency.


  7.2  System Failure: If pressure differential suddenly drops, stop operation immediately and check for possible seal failure and / or filter rupture.


  7.3  Bypass: Filtration brings about pressure differential. Pressure differential will gradually build up as filters retain more and more contaminants. No pressure differential and/or no pressure differential increase imply that there is no actual filtration is taking place. Stop operation and check for possible seal failure and / or filter rupture.

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