Main Components of a Garlock Plastic-Lined Butterfly Valve

There are 6 main components of a Garlock plastic-lined butterfly valve: the body, the stem, the stem seal, the backup elastomers, the disc, and the liner.

The Body

• Construction
  • Offered in sizes 150# 2-24” (PN 10/16 DN 50-600)
  • Comes in 2 options: Lug or Wafer
• Materials
  • Graphite Cast Ductile Iron A395 (0.7043) (standard)
  • Cast Steel A216 WCB (1.0619)
  • Stainless Steel 316 (1.4581)
  • Other materials available upon request

The Stem

• Stainless Steel
  • Sizes 2-12” = CA6NM (1.4313)
  • Sizes 14-24” = 420SS (1.4021)
• Other materials available upon request

The Stem Seal

• PTFE carrier with Viton o-rings
• Other rubber o-ring materials available upon request

The Backup Elastomers

• Silicone (standard)
• Viton, EPDM, Neoprene and Kalraz available upon request

The Disc

• Encapsulated Metal Core Discs
  • Metal Core:
    • Sizes 2-2.5” is CF8M (1.4408) Stainless Steel
    • Sizes 3-24” is A526 (0.7040) Ductile Iron
  • Encapsulations Available:
    • PTFE
    • UMPE
    • Abrasive-Resistant PTFE
    • Anti-Static PTFE
• 100% Metal Discs
  • Stainless Steel 316L (1.4581)
  • Hastelloy C22 (2.4602)
  • Titanium Gr. 2 (3.7035)
  • Other materials available upon request

The Liner

• PTFE (standard)
• UMPE (Ultra High Molecular Weight Polyethylene)
• Abrasion Resistant PTFE (carbon-reinforced PTFE)
• Anti-Static PTFE (graphite-reinforced PTFE)