Single-Handwheel Round Manway with Full Glass Cover

A round manway with a full glass cover and one side handwheel for observation and access on non-pressure tank tops. The illustrated assembly uses tempered glass and silicone seals, with six listed sizes from 300 to 600 mm.

Frame and cover-ring options	304 / 316L stainless steel
Tank connection	Welding
Viewing assembly	Tempered glass with silicone gaskets (illustrated)
Closure	One side handwheel and swing bolt
Drawing sizes	300, 350, 400, 450, 500, 600 mm

Size

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A full glass cover for observation

The central area of this round cover is glass, allowing visual observation through the closed cover. A metal cover ring surrounds the glass, while one handwheel is positioned at the side. The assembly combines a viewing surface with an access opening, rather than a small sight window fitted into a solid lid.

Glass, steel and seal components

The illustrated parts list identifies tempered glass, silicone gaskets, and 304 or 316L options for the frame and cover ring. These component descriptions help distinguish the glass assembly from an all-metal manway. Replacement glass and seals should match the illustrated assembly geometry as well as the required material.

Six sizes and separate viewing dimensions

The dimension drawing lists 300, 350, 400, 450, 500 and 600 mm sizes. It separately labels the viewing dimension D, collar height H and thickness dimensions t and t1. Use the complete selected row when comparing an opening; the nominal size should not be substituted for the clear glass viewing dimension.

Tank-top layout and maintenance access

This design is described for non-pressure tank tops. Plan the welding connection and surrounding layout together, leaving access to the side handwheel and clearance to move the cover. Routine checks should include the visible glass and gasket condition; keep the viewing surface clear without scratching or striking it.