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Series 52500 Emergency Pressure / Vacuum Manhole Cover Vent
Brand: Protectoseal CompanyProtectoseal’s Series 52500 Manhole Cover with pressure and vacuum relief, provides both emergency pressure relief and vacuum relief when installed on the manhole of a storage tank.
In emergency situations (external fire involvement of the tank), normal venting devices may be too small to prevent over-pressurization of the tank.
The Series 52500 provides the necessary pressure relief capacity to maintain the tank in a safe operating range.
The integral vacuum vent provides additional protection against tank collapse due to excessive vacuum in the vapor space.
Features- Vents directly to atmosphere
- Sizes 16" (DN 400) through 24" (DN 600)
- Pressure setting achieved by weight loading
- Vacuum setting achieved by spring loading
- Reseats automatically
- Patented, FEP film “Air-Cushioned Seating”
- Low-leak pallet design-certified test reports
- Conforms to the latest ATEX Directive
- Easy access manway facilitates inspection & repairs
- Available in Carbon Steel, Aluminum & Stainless Steel
Specifications
Brand
Approvals & Certifications
- ATEX
Enclosure, Body Material
- 316 Stainless Steel
- Aluminum
- Carbon Steel
Flange Size - 16” (DN 400)
- 16” (DN 400) - PN 16
- 16” (DN 400) - 150#
Flange Size - 18” (DN 450)
- 12” (DN 300) - 150#
- 12” (DN 300) - PN 16
Flange Size - 20” (DN 500)
- 20” (DN 500) - 150#
- 20” (DN 500) - PN 16
Flange Size - 24” (DN 600)
- 24” (DN 600) - 150#
- 24” (DN 600) - PN 16