O-ring Selection

STEPS FOR SELECTING SUITABLE O-RING THAT APPLICATIONS DEMANDS:

STEP 1: CHOOSING ENCAPSULATION

FEP Teflon® Tubing	PFA Teflon® Tubing
A wide chemical resistance	All the benefits of FEP tubing
Temperature range of -60 to 205 degree Celsius (-76 to 400 degree Fahrenheit)	A higher temperature range -60 to 260 degree Celsius (Short duration 300°C)
Low compression set	A higher/more mechanical strength
Low coefficient of friction	An increased stress and crack resistance
High corrosion resistance	Longer wear ability
FDA,USP CLASS VI,SANITARY 3A COMPLIANT	FDA,USP CLASS VI,SANITARY 3A COMPLIANT

STEP 2 : INNER CORE SLECTION

Inner Core / Profile Options

• Silicone Inner Core

  Commercially best material option combined with lower Shore Hardness and greater elasticity than Viton®, providing an excellent material choice for the majority of applications.

  Shore Hardness average of the seal is;

  85-90 Shore A for solid core Silicone

  Chemours FEP CJ95 ASTM D-2116-07 type IV: 5000 psi

  Viton® Inner Core

  Greater chemical resistance than Silicone. If encapsulation is damaged, Viton® provides greater resilience to chemical attack.

  Shore Hardness average of the seal is;

  90-95 Shore A for solid core Viton®


  Chemours FEP CJ95 ASTM D-2116-07 type IV: 5000 psi

• Silicone Hollow Inner Core

  Greater compressibility than solid Silicone core, with a hardness similar to a standard elastomeric 'O'-Ring. The hollow core flexibility means less clamping force is required to enable its sealing abilities. Ideal for fragile applications using sensitive materials, such as glass or light plastics. Useful for where the sealing area may require room for movement during operation.

  75-80 Shore A for hollow core Silicone®


  Chemours FEP CJ95 ASTM D-2116-07 type IV: 5000 psi

  The degree of squeeze best recommended is;

  15/22% for static applications

  10/15% for dynamic applications

  8/10% for pneumatic applications