XB Air Duct Fabric Compensator(Rectangle)

Brandlanphan XB
OriginZhengzhou, Henan, China

 XB nonmetal air duct fabric compensator
Product Description

Henan Lanphan XB nonmetal air duct fabric compensator owns excellent sound absorption and noise reduction function, it can remit pipeline error and noise which caused by draught fan vibration, and well compensated pipeline vibration which caused by air duct draught fan, also excellent protective effect on tired-resistance of pipeline. Comparing to metal SS bellows, although the temperature endurance of nonmetal fabric compensator is not very high, its max application temperature is below 1200℃, it has excellent corrosion resistance property. Plus, stainless steel bellows are used in outdoor for a long time, generally it will be corroded by acid rain, thus, SS bellows is easy to rust(except for special material manufacturing), and SS bellows costs more. Compared with SS bellows, air duct fabric compensator costs less, if abrasion badly, just change its cover, which greatly reduced the manufacturing costs, also applicable for reuse.

Henan Lanphan XB nonmetal air duct fabric compensator has round and square style structures, connection methods includes flange type and welding type, it can be used under 1200℃ for a long term, customers can choose different compensator according to their application environment. Insulating layer and thermal-protective layer material mainly consist of PTFE pressed film glass fabric, EPDM coating glass fabric, NBR coating glass fabric, PTFE film and other single layer or multiple layers composite material, besides, except for compensating pipeline, compensator also has abrasive resistance, which can well prevent the friction of hot soot particle and lengthen compensator service life.

We produced the XB air duct fabric compensator according with D-LD2000 standard, and it is widely used for the stack desulfurization, dust-cleaning equipment, air heating, entrance and exit of blast equipments in steelworks, smelting plant, petrochemical plant, thermal power plant, cement plant and atomic energy plant, its property is greatly superior to metal expansion joints , and highly praised by customers.

Basic structure and function

  1. Fabric.Fabric is the main flexible material of non-metallic expansion joint s, it is compounded by excellent silicone rubber or high silica PTFE and alkali-free glass cotton, and it is a kind of high strength sealing composite material. It has function of absorbing swelling capacity, prevent air leakage and rainwater leakage.
  2. Stainless steel wire mesh.Stainless steel wire mesh is the lining of nonmetallic expansion joints, it is used to prevent sundries into expansion joints and prevent thermal insulation material from lost.
  3. Heat preservation cotton.Used to ensure heat preservation and gas tightness properties, it is composed of glass fiber cloth, high silica cloth and all kinds of heat insulation cotton felt, its length and width are the same with outer fabric, has excellent extensibility and extension strength.
  4. Thermal insulation packing layer.It’s the principle security of heat insulation, mainly composed of high temperature resisting material as multiple layers ceramic fiber, whose thickness can be confirmed by heat-transfer calculation.
  5. Frame.It’s the outline support to ensure enough strength and stiffness, frame material matches with medium temperature. Generally, below 400℃ use Q235-A, above 600℃ use stainless steel or heat-resisting steel.
  6. Baffle.Used for stream guidance and thermal-protective coating. Material matches with medium temperature, resistant to corrosion and abrasion. It won’t influence displacement of expansion joints.


No. Temperature Grade Category Connecting pipe, flange material Draft tube material
1 T≤350℃ I Q235A Q235A
2 350℃<T<650℃ II Q235, 16Mn 16Mn
3 650℃<T<1200℃ III 16Mn 16Mn

Detail explanation for structural layer of air duct frabic compensator

I type:
Surface layer: silicone rubber fiberglass fabric;
Second layer: wired fiberglass fabric;
Third layer: asbestos cord fabric;
Fourth layer: PTFE foil;
Fifth layer: asbestos blanket;
Sixth layer: stainless steel wire mesh.
II type:
Surface layer: silicone rubber fiberglass fabric;
Second layer: industrial canvas;
Third layer: asbestos cord fabric;
Fourth layer: fiberglass blanket;
Fifth layer: asbestos fabric;
Sixth layer: stainless steel wire mesh;
Seventh layer: wired fiberglass fabric.
III type:
Surface layer: silicone rubber fiberglass fabric;
Second layer: industrial canvas;
Third layer: aluminum silicate fiberglass fabric;
Fourth layer: asbestos fabric;
Fifth layer: zirconium fiberglass blanket;
Sixth layer: wired fiberglass fabric;
Seventh layer: stainless steel wire.
product details product details


  1. Thermal power plant: boiler, purging system of gas turbine, dust removal system.
  2. Petrochemical enterprise: boiler, stack desulfurization equipment for industrial furnace , ventilating duct.
  3. Steelworks: blast furnace, converter, smoke discharge and dust removal syste.
  4. Smelting plant: air supply and exhaust system of combustion furnace.
  5. Cement plant: kiln, dust collection, smoke treatment.
  6. Equipments: dust collector, absorption tower, air heating device, air blower.


our service

Pre-Sales Service

  1. According to product’s using condition, technicians will offer rationalization;
  2. Provide detailed product performance specification;
  3. Provide professional quoted price;
  4. Provide 24-hour technical consulting reply.

In-Sales Service

  1. Begin to supervise from raw material, its qualified rate can reach to 100%;
  2. Whole manufacturing process are in strict accordance with promised procedure requirements, product qualified rate can reach to 100%;
  3. Provide product’s inspection record of key junctures to customers;
  4. Provide production schedule photos to customers at regular intervals;
  5. Package and transport products strictly accordance with export standard.

After-Sales Service

  1. Under the premise of correct installation, normal maintenance and using, we guarantee one-year warranty period;
  2. When warranty period has expired, our sold products enjoys lifetime guarantee repair, we only charge cost price for changing product’s standard component and sealing component;
  3. During installation and adjustment period, our after-sale service staff will communicate with customers frequently to know product’s running state in time. Assist customers to install and adjust products until customers are satisfied;
  4. If product has malfunction during operation period, we’ll offer you satisfied answer in time. We’ll reply you within 1 hour and provide solution or send staff to spot within 24 hours after receiving maintenance notification.
  5. Lifelong free technical support. Conduct satisfaction survey and inquiry equipment running condition to clients by telephone or e-mail semiannually from the first day of equipment running, put on records of acquired information.


  1. What’s the pressure-bearing range of fabric compensator?
  2. What’s the temperature range of fabric compensator?
  3. What’s the max compensation amount of fabric compensator?
  4. Which corrosion prevention method does it use?
    Generally use oil paint corrosion(epoxy zinc-rich oil paint).
  5. Can the fabric compensator field assembly?
    We can provide field assembly for larger diameter(over height and width limitation) compensator or short material supply period.

customers packaging & shipping

packaging & shipping


  1. Carton+wooden cases.
  2. Customized packaging can be available.


  1. We can ship the goods to you by International Express such as DHL,UPS,TNT,EMS and so on.
  2. You can also choose the appropriate one based on your timeline and budget.
  3. You can choose to use your own shipping agent.
Shipping method Note
Express Door to door, very convenient, don't need to clearance or pick-up
By air Airport to airport, you need to do the customs clearance and pick up the goods at your local airport, which you can have a local shipping agent to do for you.
By sea Port to port and you need to do the customs clearance and pick-up the goods at your local port, which you can have a local shipping agent to do for you.


  1. Thermal expansion compensation: nonmetallic compensator(expansion joints) can provide larger multidimensional direction compensation in smaller range of size.
  2. Compensate installation error: it can better eliminate installation error.
  3. Noise elimination and shock insulation: effectively reduce noise and shock of boiler and draught fan system.
  4. No reaction thrust: since its main material is fiber fabric, no reaction thrust.
  5. Good sealing property: under effect of all kinds of medium, it has excellent sealing property and easy to maintain.
  6. Price is lower than metal compensator.
    Chanzhi Chanzhi5.3.2