Carbon Graphite Seals & Steam Joints

Carbon Graphite Seals & Steam Joints

Helwig Carbon Products has been manufacturing mechanical face seals from carbon graphite for over 40 years. Carbon graphite is an ideal seal material in every aspect. Self lapping and flexible enough to conform to the mating face, very hard and resistant to wear, and self lubricating. It’s also lubricated by almost any fluid so the media being sealed can act as a lubricant. It’s impervious and resistant to most chemicals.

We have a wide selection of grades and sizes in stock and have the ability to manufacture custom parts quickly. With our CNC equipment we can accurately manufacture a wide variety of shapes and routinely hold tolerances of 0.0005" (0.013 mm) and 2 HE light bands flatness for seal face surface finishes.

PDF: Self Lubricating Mechanical Components

Advantages of Carbon Graphite Seals

  • Self lubricating
  • Low coefficient of friction
  • Resistance to chemicals, corrosion, and oxidation
  • Dimensional stability under wide temperature variations
  • Compatible with food & pharmaceuticals
  • Low coefficient of thermal expansion
  • Excellent thermal shock
  • Good thermal conductivity
  • Good mechanical strength
  • Mates to a wide variety of materials

Typical Applications

  • Corrosive environments
  • Chemical pumps
  • Steam joints
  • Food processing pumps
  • Process pumps in refineries
  • Cold and hot water pumps
  • Seals for agitators and mixers
  • Temperatures above 400 deg F
  • Cryogenic applications