Materials Selection

INFLATABLE SEAL MATERIALS

Seal Master seals are not simple rubber extrusions; they are custom built, fabric reinforced, and fully molded to fit your application. This ensures structural integrity for optimum performance.

Numerous combinations of fabric reinforcement and elastomers are utilized in Seal Master inflatable seal construction. These combinations are chosen in response to the geometric and environmental challenges of your application. You are not asked to specify materials to be used; this question is resolved through a collaborative effort between you and Seal Master engineers, as you define the performance parameters of your application.

TYPICAL ELASTOMERS USED

Based on your environmental requirements, the best alternative elastomer will be selected.

  • Natural Rubber (NRx)
  • Chloroprene (Neoprene) (CR)
  • Nitrile (NBR)
  • Butyl (IIR)
  • Silicone (SI)
  • Ethylene Propylene (EPDM)
  • Fluorocarbon (Viton ®)(FKM)
  • Polyurethane  (AU) (EU)

FABRICS USED IN INFLATABLE SEALS

Durability and shape retention is provided by a variety of fabrics; inflatable seals are reinforced for maximum strength. Typical fabrics used to reinforce Seal Master® inflatable seals include: Dacron Kevlar® Nomex® Nylon

DUROMETER

The hardness of rubber compounds is measured by the Shore A durometer; the higher the durometer number, the harder the compound. Softer compounds stretch easier and seal better on rough surfaces. Harder compounds offer greater abrasion resistance and resistance to extrusion. Extrusion must always be considered when high pressures are used.