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Roof Manhole Cover

Model 8200

Roof Manhole Cover

The Groth Model 8200 Roof Manhole Cover is used when quick and easy access is desired. It is generally placed on digester covers or roofs. It is required in most cases by insurance underwriters to be non-sparking and gas tight. The seal is provided by a Buna-N diaphragm and the surface bearing is distributed evenly all around by the design. The model 8200 incorporates a positive cover lockdown which assures a premium type seal on digester tanks with internal pressures up to 1 psig.

Specifications

Size: 18" (DN 450), 20" (DN 500), 24" (DN600), 30" (DN750), and 36" (DN900) **type 356, 18" - 24" only

Material: Available in aluminum*, carbon steel, stainless steel, fiberglass and other materials

Features

  • Easy to open and seal
  • Non-sparking and gas tight
  • Larger sizes available, consult the factory
  • type 356, 18" - 24" only

Options

  • Larger sizes available, consult the factory

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