Designed specifically for pneumatic-filled tanks. Releases at a 6-inch water column to prevent over-pressurization, ensuring that the tank maintains proper ACFM at all times – even in the event of air surges that cannot be handled by primary venting. Available in 19 and 24 inches.
F.S.2650® MANWAY COVERS: Maximum Flow For Pneumatic-Filled Tanks. Poly’s F.S.2650® combined manway and vent allows for unsurpassed tank venting. It is capable of relieving a volume flow rate of up to 2650 ACFM.
Available in two sizes, 17 and 24 inches, with bolts of stainless steel, Alloy C-276 and titanium. Gasket materials available include EPDM, Viton®, Viton® GF, XLPE or Buna. The 17-inch model is often used on 19-inch manways as well. Fume-tight manway cover is required for HCl applcations.
Used primarily for hydrogen peroxide applications. Prevents pressure buildup during rapid decomposition of chemical. Manway lid attached to tank with weighted arm made of 316 stainless steel. At 0.25 psi, lid automatically opens to relieve pressure. After pressure is relieved, manway automatically closes and tank is sealed.
Open-top covers are used for cylindrical and rectangular open-top tanks. Created using 1/4" to 3/4" polyethylene sheet. Port access allows for easy empyting of solids and salts into the container, for mixing.