Clamp-Closure Round Manway for Powder Tanks

A round manway with a low-profile welded collar and a cover retained by a perimeter clamp ring. Described for top feeding on powder tanks and turnover silos, it has 304/316L frame and cover options.

Connection	Welded tank collar
Reference material options	304 / 316L stainless steel
Cover & application structure	Removable round cover; powder-tank top access
Closure hardware	Perimeter split clamp with lever handle
Listed dimensions & finish	300 / 350 / 400 / 450 / 500 / 600 (drawing Spec)

Size

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Top access for powder handling

The round cover and low-profile collar form a tank-top feeding and access opening. The listed applications include powder tanks, pharmaceutical turnover silos and lithium-battery-material turnover equipment. Consider the opening position together with the surrounding handling equipment and the space needed to remove the cover.

Perimeter clamp closure

A split clamp ring surrounds the cover and collar. The illustrated assembly includes a lever handle, swing bolt, pin and hex nuts for the clamp closure. This differs from a hinged cover secured by multiple perimeter handwheels. Select replacement closure parts against the same illustrated assembly.

Frame, cover and seal options

The frame and cover list 304 or 316L stainless steel, and the illustrated perimeter gasket is silicone. Confirm the required seal material and profile for the handled powder and cleaning process. A related chained cover is a separate configuration, so a retaining chain should be specified rather than assumed included.

Size rows and maintenance layout

The dimension chart lists six sizes from 300 to 600, with collar and cover thicknesses changing at the largest size. Use the complete selected row when comparing the tank interface and replacement parts. Leave access to the clamp handle and a suitable route to lift the cover clear; inspect the visible clamp and gasket seating area during maintenance.