The Quality
Industrial Rubber Sheets


World class quality and the well-evolved rubber technology at our command is underscored by an ISO 9001 Certification and ISO 14001certification covering all major criteria i.e. Design, Development and Production. This reassures our clientele a consistent quality and on-time deliveries. Each air cell endures a four day test procedure where it is checked, rechecked and double checked for leakages under pressure and proper performance leaving no doubt in our customer’s mind regarding the dependability of the product. 

Routine Tests   

Basic Fabric:

  • Visual Inspection for Knots & Holes
  • Breaking Strength
  • Elongation


Coated Fabric:

  • Air permeability
  • Visual Inspection for Pin-holes
  • Mass Surface
  • Thickness
  • Swelling
  • Tear Strength
  • Breaking Strength
  • Elongation
  • Adhesion

Finished Product:

  • Pressure Testing by Compressed Air
  • Leakage Testing with Soap Solution
  • Puncture Testing

Type Tests   

Coated Fabrics for:

  • Heat Ageing
  • Compression Test
  • Low Temperature Flexibility
  • Sludge Content
  • Acidity
  • Ozone Resistance
  • Air Permeability
  • Test Certificates can be provided upon request

Finished Product   

  • Pressure Testing by Compressed Air
  • Leakage Testing with Soap Solution
  • Puncture Testing

Faults & Remedies   

Zena-Cell is manufactured considering all aspects of application during its use in the transformers. In the normal course of use, careful handling, storing and fitting of the aircell will give a good service life. However in the event of mishandling or accident the fabric can get ruptured or the joint may open, leading to leakage of air in the conservator. For minor repairs a kit with working instructions is provided along with each air cell. For major damage the aircell will have to be returned to the our manufacturing facility.