Hongtek

Bag filter mechanism

The flow of liquid from the inside filter bags to outside, the filter out particles trapped in the bag, so bag filter works by pressure filtration. Entire bag filter system consists of three parts: the filter container, basket and filter bags.

To filter the liquid to be supported from the support of the basket into the filter bag at the top, which makes the surface of the liquid evenly distributed in the filter, so that the entire flow of the medium is consistent with the distribution of the surface, there is no negative effect of turbulence.The flow of liquid from the inside filter bags to outside, the filter out particles trapped in the bag, making the replacement filter bag will not pollute the liquid has been filtered. In the filter bags handle design makes replacement quick and easy.

Features are as follows:

High flow capacity

Longer service life

High filtration efficiency, lowest cost.

Uniform flow of liquid so that the average particle distribution of impurities in the filter layer in the bag

1.Selection of filter bags material 

First, the fluid to be filtered according to the chemical name, due to the chemical filter is available with contraindications to find out, and then for its operating temperature, operating pressure, pH, operating conditions (Eg, whether it is necessary tolerance of steam, hot water or chemical sterilization, etc.) ,individual assessment, and remove the filter does not suitable.Application is also an important consideration, for example, drugs, food or cosmetics of the filter material must be permitted by the FDA; ultra-pure water shall be selected, release the material does not contain than the impedance of the filter will affect; filter gases shall be selection of hydrophobic material and the need for "health level filter" design, and so on.

2.Filter precision

This is one of the most vexing problem. For example, to remove visible particles, to use 25-micron filter; to remove the liquid cloud-like, to use 1 or 5 micron filter; need to filter out bacterial use the smallest 0.2 micron  filter. The problem is that there are two filtration units: absolute precision / accuracy of the nominal.

3.Absolute accuracy / precision of the nominal

A value of infinity.Known as absolute filters on the market such as films, etc., strictly speaking, can only be called "close to absolute" filters, while others are part of the nominal precision.Nominal accuracy, this is the main trouble lies: "do not have a nominal accuracy of identification and compliance with common industry standards." That means company A can be set at nominal 85-95% accuracy, while Company B would rather set at 50-70%.In other words, company A may be equal to 25 micron filtration accuracy of 5 microns Company B, or more detailed.This issue, an experienced professional filters supplier could the choice of filtration, and the fundamental solution is the "trial."According to temperature of the viscosity filter ,Specialized filtration equipment suppliers need to calculate how much you can filter bag to bear much of its initial flow rate and pressure drop predicted number. If providing fluid impurities, or even estimate the filter life.

4.Filter bags system design

The title involves a wider scope,For example, should the pressure to use is a source of much needed pressure on the need to install two sets of filters in parallel to the system for continuous operation, the occasion for a broad size distribution with a coarse filter and how to fine filter, the system is have loaded check valve or other device, and so

on.These require need filter users and suppliers worked together to identify the most appropriate design.

5.Usage mode of filter bags

Filter system closed to filter:Bag filters with simultaneously supporting the use of the system fluid pressure, squeezing the liquid through the filter bag in order to achieve the purpose of filtering.With the flow speed, large capacity, the advantages of long life filter bag, particularly large flow to be confined to adapt to filtering applications.Open gravity filter: Filter bags connect directly through the suitable bag pipes and liquid be filtered by the gravity of the fluid .Its distinguishing feature is no investment in equipment, filtering is simple and feasible, especially for small size and variety, intermittent economical liquid filtration.