Plastic Spiral Belts

MORE INFORMATION

Plastic spiral belts from Spirofil can be used for dewatering and drying, as well as for transportation in many industries. A plastic (polyester) spiral belt is also known as an endless or seamless spiral mesh belt or belt filter and offers many possibilities in the areas of dewatering, filtration/separation, drying, and transportation. Long experience in industrial fabrics and a constant focus on ecology have resulted in the development of a wide range of spiral belts for mechanical (sludge) dewatering from liquid to solid. Spirofil primarily uses this type of belt in belt presses and dewatering tables or belt thickeners.

Spirofil can supply the right spiral belt for each specific situation. Most applications can be serviced with the standard range. At Spirofil, we supply three different standard types of spiral belts, both with and without filling yarns. In special cases, a spiral belt with unique properties can be developed for optimal performance in that specific situation. Special versions include belts with flat spiral wires or flat filling wires. A spiral belt can also be equipped with cleats.

Contact us for personalized advice tailored to your situation. Below you will find the specifications of our standard spiral belts. Download our spiral belts brochure here.

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Spiral belt with filler wires (type 15/50)

Spiraalband met / zonder vuldraden (type 15/50)

Spiral belt with / without filler wires (type 15/50)

Applications

Our product range covers all (sludge) dewatering – belt press liquid filtration applications, such as:

Dewatering of inert sludge from quarries or mines
Dewatering of biological or chemical sludge from municipality sewage plants
Pressing of grapes, fruit and others

Spirofil spiral belt with filler wires

Spirofil spiral belts are made from top-quality monofilament yarns of 100% polyester. For high-temperature applications, materials such as PPS or Rayton™ (Polyphenylene sulfide) are used. Each spiral belt is thermally fixed under high tension and temperature, ensuring excellent stability and a long lifespan. Advantages of a spiral belt include:

High strength
Smooth surface
Good air permeability
Stable under heat and moisture
Minimal stretch
Long lifespan

A spiral belt consists of spirals connected by a pin wire. Within the spiral, there are pin wires that determine the open area. The spiral cavity is often filled with a filling wire.

Schematic overview spiral belt

schematic overview spiral belt

Features

High strength
Very stable under high tension
Endless; the seam has the same strength as the belt and is not visible
Can be easily repaired on-site
Does not need to be precisely dimensioned; it can be adjusted on-site
Durable, smooth surface, and dirt-repellent
Available with or without filling, allowing for different filtration characteristics (air permeability 250 to over 1000 CFM*)
Edges coated with adhesive for durable, economical solutions
Widths up to 6 meters, standard lengths up to 60-80 meters
pH range of 2 to 8

In special cases, a belt with unique properties can be developed for optimal performance in that specific situation. Examples of special versions are belts with flat spiral wires or flat filling wires. Below is an image of a spiral belt with flat spiral wires.

Spirofil spiral belt with flat spiral wires

The following picture shows a spiral belt provided with a flat fill strip.

Spirofil spiral belt with flat filler strips

A spiral belt can also be provided with flights, to accommodate the application.

Spirofil spiral belt with flights

For more information about (sludge dewatering) and the (mechanical) separation processes, click here. Download our spiral belts brochure here

Below is a table with the (technical) data of our types of spiral belts.

Type psb 15/50 filled

Spiral wire dia. 0.9 mm
Cross wire dia. 0.9 mm
Filler wire dia. 0.8 mm
15 spirals per 10 cm in l.
55 spirals per 10 cm in w.
Air permeability 470 CFM
Weight 2,600 kg/m2
Thickness 3,00 mm

Type psb 21/66 filled

Spiral wire dia. 0.7 mm
Cross wire dia. 0.9 mm
Filler wire dia. 0.8 mm
21 spirals per 10 cm in l.
66 spirals per 10 cm in w.
Air permeability 400 CFM
Weight 1,850 kg/m2
Thickness 2,50 mm

Type psb 29/85 filled

Spiral wire dia. 0.55 mm
Cross wire dia. 0.9 mm
Filler wire dia. 0.8 mm
29 spirals per 10 cm in l.
85 spirals per 10 cm in w.
Air permeability 375 CFM
Weight 1,600 kg/m2
Thickness 2,10 mm

Spirofil spiraalband type 15/50 ongevuld

Type psb 15/50 unfilled

Spiral wire dia. 0.9 mm
Cross wire dia. 0.9 mm
15 spirals per 10 cm in l.
55 spirals per 10 cm in w.
Air permeability 1075 CFM
Weight 1,530 kg/m2
Thickness 3,0 mm

Spirofil spiraalband type 21/66 ongevuld

Type psb 21/66 unfilled

Spiral wire dia. 0.7 mm
Cross wire dia. 0.9 mm
21 spirals per 10 cm in l.
66 spirals per 10 cm in w.
Air permeability 1000 CFM
Weight 1,350 kg/m2
Thickness 2,5 mm

Spirofil spiraalband type 29/85 ongevuld

Type psb 29/85 unfilled

Spiral wire dia. 0.55 mm
Cross wire dia. 0.9 mm
29 spirals per 10 cm in l.
85 spirals per 10 cm in w.
Air permeability 940 CFM
Weight 1,170 kg/m2
Thickness 2,1 mm

*CFM: amount of air flowing through a spiral belt in Ft3 / Ft2 / hour at a pressure difference of 127 Pa. Spiral belts with filling wires have a permeability tolerance of +/- 15%.

Customer Stories

Ballast Nedam Milieu Techniek, https://www.ballast-nedam.nl/

We experience Spirofil as a company with fast service, available 24 hours a day. They have been our supplier for 25 years. We have always had a pleasant relationship with their staff!

Aquafin NV , https://www.aquafin.be/

During the past period, we have had a consistent and reliable partner, which is essential for our operational activities. Spirofil’s commitment to quality and timely deliveries has helped us ensure smooth production processes and keep our teams satisfied.

Attero, https://www.attero.nl

Attero has been doing business with Spirofil for years based on trust and their quick response time, combined with the quality of the work performed. Personally, I hope to continue doing business with them for many more years to come.