Q&A

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Generally, filter bags can be divided into five types:

Size 1: diameter 7”, length 17”

Size 2: diameter 7”, length 32”

Size 3: diameter 4”, length 8”

Size 4: diameter 4”, length 14”

Size 5: diameter 4”, length 20”

According to flow rate, viscosity, temperature, and impurities to select the proper specifications and materials.

We are able to make customized products for other specifications.

Common types are G collar, F collar, Stainless Steel ring and Carbon Steel ring.

  1. G collar: It is applicable to " Top Flow Single Bag Filter Vessel”. This design is embedded, and fixed to the cover. It is convenient and good leak-proof.
  2. F collar: it is applicable to “Top Flow Single Bag Filter Vessel”, “Side Flow Bag Filter Vessel” and “Multi-Bag Filter Vessel”. It is designed as hook type, so we recommended to use bag extruders. It is the most common use, and less limited by vessel type.
  3. Carbon Steel Ring and Stainless Steel Ring: It is applicable to “Top Flow Single Bag Filter Vessel”, “Side Flow Bag Filter Vessel” and “Multi-Bag Filter Vessel”. It can endure high temperature, pressure, and tension. When the filter bag become heavier or more high viscosity, it will have the better replacement and easy to pull off.

The general use of Stainless Steel ring and Carbon Steel ring is due to high temperature problems. To replace Steel ring, we develop Nylon material and Santoprene material collars. They have good temperature, chemical resistance and good adhesion.

If you need other type of collars, please to contact us.

Non-woven filter bag joints can be divided into two types, welded and sewn.

The welded parts are used ultrasonic shock to produce high-temperature bonding, so that the same attributes can be woven together. It will be not hardening phenomenon because high temperature.

If the filter bag is made with high temperature joints, it will be hardening and embrittlement. It is easy to broken and leakage.

Actually, when it is in continuous operation and constant pressure situation, this problem is never happened before. If you have any doubts, you can select the welded filter bag.

1. Because the bottom of the filter bag dangle and does not touch the bottom of the stainless steel basket, due to pressure extrusion and broken.

2. Filter bag joints are not connected completely. If there is a broken bag, please ship the broken bag back to us, we could make analysis after we get return filter bag from customer.

Generally, it is caused by external forces.

If there are sharp object, the filter bag bears the tension pressure, and it is easy to make the filter bag tear.

We divide it into two categories: hardness and softness.

Hardness: Such as solid material, there are still some impurities after filtration. So, we recommended you to use ABP Absolute Filter Bag.

Softness: Impurities are belonged to polymer or oil. So, we recommended you to use High Performance Absolute Filter bag, e.g. MBP Oil Holding Filter Bag, AGF High Performance Absolute Filter bag, and PGF High Performance Filter bag.

It depends on the products and operating conditions. Such as particles, flow rate, pressure, flow speed, pressure drop, products made with dispatch production and poor initial design.

Recommended replacement time should refer to the pressure drop.

Under the same conditions of temperature and pressure, the typical filter bag recommended replaceable pressure drop is 2.5 kg/cm2 and for the filter cartridge is 1.5 kg/cm2.

If there are any filtration problems, you can contact us, we would be pleasure to solve the problems for you.