M7n Mechanical Seal

Features

• For plain shafts
• Single seal
• Unbalanced
• Super-Sinus-spring or multiple springs rotating
• Independent of direction of rotation
• Variant with PTFE secondary seals for high chemical resistance

Advantages

• Universal application opportunities
• Efficient stock keeping due to easily interchangeable faces
• Extended selection of materials
• Insensitive to low solids contents
• Flexibility in torque transmissions
• Self cleaning effect
• Short installation length possible (G16)
• Pumping screw for media with higher viscosity (M7..F)

Operating Range

• Shaft diameter: d1 = 14 … 100 mm (0.55 ” … 3.94 “)
• Pressure: p1 = 25 bar (363 PSI)
• Temperature: t = -50 °C … +220 °C (-58 °F … +428 °F)
• Sliding velocity: vg = 20 m/s (66 ft/s)
• Axial movement:
  • d1 = up to 25 mm: ±1.0 mm
  • d1 = 28 up to 63 mm: ±1.5 mm
  • d1 = from 65 mm: ±2.0 mm

Materials

• Seal face: Special cast CrMo steel , Silicon carbide , Aluminium oxide (V)
• Seat G9: Carbon graphite antimony impregnated , Carbon graphite resin impregnated  Silicon carbide
• Secondary seals: EPDM , NBR  FKM , FFKM
• Springs: CrNiMo steel  Metal parts: CrNiMo steel , Duplex (* Cannot be combined with seal face made of S

Standards and approvals

• EN 12756

Recommended applications

• Process industry
• Chemical industry
• Pulp and paper industry
• Water and waste water technology
• Shipbuilding
• Lube oils
• Low solids content media
• Water / sewage water pumps
• Chemical standard pumps
• Vertical screw pumps
• Gear wheel feed pumps
• Multistage pumps (drive side)
• Circulation of printing colors with viscosity 500 … 15,000 mm²/s