Poly Processing

Chemical Storage Solutions

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Manways/Lids

SAFE-Surge® Manway Cover

SAFE-Surge® Manway Cover

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.

Download SAFE-Surge® literature

For detailed venting requirements, please refer to the Venting Requirements for Poly Tanks chart.

Drawings

F.S. 2650®

F.S. 2650®

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.

Download F.S.2650® literature

Drawings

 

Bolted (8/16) Manway Cover

Bolted (8/16) Manway Cover

These are the most popular covers we provide. They are available in 24 inches.

Please note that if you plan on visually inspecting the interior of the tank with some frequency, our SAFE-Surge® manway cover may be a better alternative.

Drawings

Fume-Tight Manway Cover

Fume-Tight Manway Cover

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.

Drawings

Hinged-Weighted Manway

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.

Drawings

Side Manway

Side Manway

Used for applications that require employees or personnel to enter tank.

Note: At Poly Processing, the majority of the chemicals we store DO NOT require side manways.

Drawings: 

Open-Top Cover

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.

Drawings