Polyester needle-punched felt air filter fabrics

Performance of filter felt

1)good permeability,good abrasiveresistance

2)after heat treatment, its surface is very smooth,not easily deformed and easy cleaning.

3)after water and oil repellent treatment,it will have hydrophobic properties,which can be used in condition of high moisture content or contain a small amount of oil smoke.

4)moderate acid and alkaline

5) Normal working temperature:130-150°C

Application of filter felt

Widely used in industrial dust collection,dust control and so on.

Other similar products:  

Polyester(PET), Polypropylene(PP), PPS,Polyimide(P84),Anti-static polyester, water and oil repellent, PET membrane, 

FMS,(aramid), PTFE, fiberglass, P84 fiber.

Remarks  

1) The length of dust filter bags: can be customized 

     Usual size: diameter 100mm, 125mm, 130mm, 150mm, 180mm, 250mm ect.

2) Process Method: sewing or welded

3) Bag top and bottom types:

1. Raw top(Fold in top)
2. Flange top
3. Double beaded snap band top
4. Double bottom

 4)Sewing thread:

     PTFE thread, fiberglass thread, thread, polyester thread.

5) If your required filter bag is different from our usual one, then please send us your drawing picture and 

    choose the material you need since we also produce the nonstandard filter bag. 

      Hengze company, as a sino-foreign joint ventures, is a filteration products manufacturer which is located in Tiantai County, Zhejiang Province.With the experience of working in filter industry for more than 25 years, our company is now a main supplier for needle punched filter felts,dust collector filter bags, liquid filter bags and press filter bags in China. Since the good quality and reputation, we have a longterm cooperation with a us-funded enterprises in the world.

      We have invested in high-efficiency needle punched non-woven filter felt production lines, automatic bag sewing lines and laser cutting equipment to ensure the capacity and quality of our final products. We have more than 200 workers, producing more than 3 million square meters of filter felts and 3,000,000 pieces of different filter bags annually. We have more than 300 end users all over the world, covering cement plants, steel mills, carbon black plants, garbage incinerators, food industries, chemical industries,etc. We are also capable of providing filter solutions for final usage.We are also an ISO9001:2008 certified company,enjoying reputation of good product quality.What's more, we can meet customized design and have perfect after-sale service system.

1. How to choose material for  filter bag with good price ?

Since every filter has its own characteristics and parameters, when we choose filter material for

dust collector filter bag, we have to know the following parameters:

(1) Working temperature

(2) Humidity

(3) Dust diameter

(4) Gas’ chemical properties

(5) Dust abrasiveness

(6) Filter's mechanical parameters

2.How to assure the product quality?

We will send the sample for your confirmation first, and then produce the products according to your requirement. 

3.Can you provide free sample ?

Normally, our sample fee is free if its value is less than $5. 

However, you have to pay us the courier cost like: DHL.FEDEX.UPS.TNT...   

4.Generally, what is the delivery?  

In normal circumstances, the products can be delivered within 1 week after your deposit.

5.Why aren't my bags lasting as long as they used to?

Usually because they are working harder. Bag’s life is limited by the amount of dust captured, not by hours they are used. Bags filtering clean working environment may last a year. A bag filtering high dust containing plant may only last a few weeks. A product can appear clean to the naked eye and still be full of particles that are too small to see. 

6.How do I know when to change bags?

Monitor the inlet pressure. The pressure drop across a bag rises as the active surface area is used up. When the pressure starts to raise faster the bag is almost used up and should be changed. Every application is different, but a good rule of thumb is to change bags when you see 8-12 PSI pressure drop (the difference in pressure between the filter's inlet and outlet). 

7.How many times can I clean and reuse a filter bag?

Filter bags are designed for one time use. Attempting to clean a bag will stretch the material. Some holes will get bigger and allow dust to get through. Other holes will get smaller, plug up faster, and start removing things from the product that are supposed to stay in it.

8.Do you offer volume/distributor discounts?

We do offer volume discounts, but that is based on the quantities ordered and frequency of orders. Contact us in regards to volume discounts and we will gladly give you more details.

9.What shipments are available?

Normally, we ship goods by sea,air or express. Special requirement can also be acceptable.

(1) By sea: to your nearest sea port 

(2) By air: to your nearest air port 

(3) By express:  (UPS,DHL.FEDEX,TNT...) to your door 

Welcome to contact us!