Full-View Glass Cover Round Manway with Four Handwheels

A round stainless steel manway featuring a hinged full-aperture tempered glass cover rimmed in stainless steel and clamped by four swing-bolt handwheels. Listed in 304 or 316L across seven drawing sizes from 250 to 600.

Connection	Butt-weld round neck collar
Material options	304 or 316L frame and cover ring; tempered glass plate; silicone gaskets; 304/ABS/ring handwheels
Closure structure	Hinged full-aperture glass cover assembly with side handle and 4 swing-bolt handwheels
Shape	Round
Size range	250 / 300 / 350 / 400 / 450 / 500 / 600 (drawing Size)

Size

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Full-Aperture Glass Lid Construction

Instead of a small sight port in a solid lid, the cover assembly sandwiches a circular tempered glass plate (described in the series specification as 10–20 mm thick) between an upper stainless steel cover ring with an integrated side handle, dual ring gaskets, and a lower retaining flange secured by eight screws.

Four-Bolt Clamping and Component Materials

The hinged cover assembly seals against the weld-in neck frame using four perimeter swing bolts and four handwheels available in 304 stainless steel, ABS, or ring styles. The frame and upper cover ring are offered in 304 or 316L, while the retaining flange and fasteners are 304 stainless steel.

Drawing Sizes and Collar Heights

The dimension table lists seven nominal sizes—250, 300, 350, 400, 450, 500, and 600—with outer diameters from 256 to 606 and a neck wall thickness t of 3. Standard collar height H is 120 across sizes 300 to 600, while size 250 lists H options of 120, 150, or 200.

Application Context and Selection Checks

Typical applications include use on brewery saccharification and process vessels where wide-angle visual inspection and light transmission are desired. Before ordering, confirm the glass plate thickness for the selected diameter, collar height H, and gasket elastomer (silicone, EPDM, FKM, or NBR).