Statotherm V Cover seal V881-

Statotherm V cover seals V881 (self-sealing) consist of pure graphite rings (purity > 99%) with an embedded stainless steel reinforcement. They are used in particular in applications with large gaps and high pressures. For example, Statotherm V cover seals V881 are used successfully in power stations at high temperatures and with diameters of up to 1,000 mm.

Statotherm V Cover seal V881-

Product Description

Features:
  • Self-sealing 
  • Consist of pure graphite rings (purity > 99%)
  • Embedded stainless steel reinforcement  
  • Designed for applications with large gaps and high pressures
Benefits:
  • Especially suitable for sealing large gaps
  • Easy to assemble and disassemble
  • No damage to the sealing surfaces
  • Long service life
  • Do not harden
  • Optimized sealing result
  • Minimum wear of the contact surface
 

Technical Specifications

Operating range:

Pressure: p = 800 bar
Sliding velocity: vg = 2 m/s
Temperature

  • Continuous operation:
    t = -200 °C ... +500 °C
  • Steam: tmax = +550 °C
  • in a reducing or inert environment: tmax = +3.000 °C

Recommended surface roughness: Rz = 10 ... 40 μm
Chemical resistance: pH = 0 ... 14
Resistant to almost all organic and inorganic acids, alkalis, oils and solvents.

V881-B6: density 1.3 g/cm3
V881-B7: density 1.4 g/cm3
V881-B8: density 1.6 g/cm3

Recommended applications:
  • Process industry
  • Petrochemical industry
  • Chemical industry
  • Power plant technology
  • Building services engineering
  • Valves
Variants:

V881/R7 (rectangular)
V881/A7 (outer chamfer)
V881/I7 (inner chamfer)
V881/R7K (rectangular with one cap)
V881/A7K (outer chamfer with one cap)
V881/-I7K (inner chamfer with one cap)
V881/N7 (for applications in nuclear power plants, graphite purity > 99,85%)

Functional description:

Design and ordering information
The design of the cover seal depends on the pressure and dimensions. Please specify the operating conditions and profile shape with any enquiries or orders (example: pressure in bar, diameter d1 and d2, profile shape I, A or R).

Notes:

Minimum surface pressure:
The seal and preloading are generally created by the working pressure, but there is a minimum surface pressure that must be achieved when the seal is installed.

Forms of supply:
  • Die-pressed rings, to drawing, measurements or other agreement
  • Available in different densities and profiles