Emergency Vent & Manhole Cover Model 94221

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Model 94221 Emergency Vent and Manhole Cover from SESCO provides emergency relief of excessive internal pressure and vacuum beyond that provided by tank breather requirements.

Technical Data

Sesco SKU:tp-020 Category: Brand:

Available on backorder


This weight loaded vent utilizes Unique-Seal diaphragms which provides tight seals between pallets and seats.

Special diaphragm materials are available for vents subjected to severe low temperatures or used on tanks storing heated stock. Corrosion resistant pressure/vacuum seat is standard.

Model 94221 is available in 20″ and 24″ size to fit a standard API or ANSI flange. Special Flanges are available including DIN.

Features & Benefits

  • Design incorporates pressure and vacuum relief.
  • 20″ and 24″ roof man hole
  • ”Sef-energi2ing” Unique-Seal diaphragm assures a tight seal
  • Reduced maintenance costs
  • No unbolting of vent for gasket replacement or tank