Anderson Greenwood Crosby Whessoe Marvac 4210A Manhole Cover

Description

Provides access and emergency protection against costly ruptures.

  • Hinged cover provides a fixed pivot point, ensures proper reseating and added safety.
  • Cover cannot separate from the base.
  • Easily lifted open to provide a large, unobstructed passage for easy tank access.
  • ‘Tite seal’ diaphragm design ensures minimum vapor leakage losses to 1 CFH at 90% of setting.
  • Durable PTFE seal backed by a non-asbestos cushion disc for added resiliency and reduced leakage.
  • PTFE diaphragm protects the cushion disc from direct contact with tank vapors in chemical and low temperature applications.
  • Carbon steel units have steel bases with a welded and machined stainless steel tip on the nozzle perimeter to ensure a corrosion resistant seating surface.
  • Optional stainless steel bases for chemical and low temperature applications.
  • Flange mounting dimensions conform to either API 650 or ANSI 150#.
    Optional vacuum valve available in cover.