CobaDGS seal
CobaDGS seal

Features mechanical seal cobaDGS

The sealing solution for reduction of methane-/ process gas emissions

  • Gas-lubricated
  • Bi-directional
  • Ready-to-fit cartridge unit
  • Available for following seal arrangements: single and tandem
  • Co-axial primary seal
  • Separation seals as CobaSeal, carbon rings or labyrinths optional

Advantages mechanical seal cobaDGS

  • No methane-/ process gas emissions
  • Supplied with clean nitrogen (no dew point and dirt problems)
  • Robust
  • Offers higher safety than a double seal
  • Upgrade-possibility of existing single, double and tandem seals
  • No modification of the compressor necessary
  • Efficient alternative to hermetically sealed systems
  • For compressors with gas- and steam turbines, as well as with electric drive

Operating range mechanical seal cobaDGS

  • Shaft diameter:
    d = 25 … 350 mm (0.99“… 13.78“)
  • Pressure:
    p = from vacuum up to 160 bar (2,321 PSI)
  • Design temperature:
    t = -46 °C … +230 °C
    (-51 °F … +446 °F)
  • Sliding velocitiy:
    vg = up to 140 m/s (459 ft/s)

Materials mechanical seal cobaDGS

  • Stationary seal face: Silicon carbide with DLC-coating, DiamondFace-coating optional
  • Rotating seal face (Seat): Silicon carbide with DLC-coating, DiamondFace-coating optional
  • Secondary seals: FKM or other elastomers, depending on product gas composition
  • Metal parts: 1.4006 or other stainless steels

Other materials on request.
Dimensions on request

1(Seat) Rotating seal face
2(Seal face) Stationary seal face
3Thrust ring
5Shaft sleeve
8DGS as seal on atmoshere side
9CobaSeal as separation seal

Recommended applications seal cobaDGS Burgmann

  • Pipelines
  • Gas storages
  • Oil and gas industry
  • Chemical industry
  • Power plants
  • Centrifugal compressors
  • Turbo expander
  • Turbines
  • Pumps
  • Blower