Single-Handwheel Domed Round Manway with Central Sight Glass

An outward-opening domed round stainless steel manway featuring a boxed rear hinge, a single opposite swing-bolt handwheel, and a central bolted sight glass. Tabulated in five drawing sizes from 350 to 600 (OD 355–608 mm) with DN80 to DN400/500 viewing ports.

Connection	Butt-weld round neck collar
Material options	SS304, SS316L; silicone, EPDM, FKM/Viton, or NBR seal
Closure structure	Outward-opening domed cover with boxed rear hinge, 1 opposite swing-bolt handwheel, and central bolted sight glass
Shape	Round with domed cover
Size range	200–600 mm (OD 355–608 mm)

Size

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Domed Cover with Single Opposite Handwheel

The assembly combines a dished, outward-opening circular cover mounted on a cylindrical weld-in neck collar. One side of the cover pivots inside a boxed rear hinge shroud, while the opposite side fastens with a single swing bolt and star handwheel.

Central Flanged Sight Glass Port

At the center of the domed lid, a bolted circular sight glass assembly allows visual inspection of interior vessel levels and spray patterns without unlatching the cover. Sight glass sizes scale across the drawing table from DN80 and DN100 up to DN150, DN200, and DN400/500.

Tabulated Dimensions and Materials

Five nominal sizes are detailed in the dimensional drawing—350, 400, 450, 500, and 600—with collar outside diameters from 355 mm to 608 mm and a 100 mm collar height. Collar and cover wall thicknesses increase at the larger diameters, and each manway size is paired with a corresponding central sight glass port from DN80 up to DN400/500.

Selection and Specification Checks

Because the series specification prints 200–500 mm and the generic series schedule lists 8"–24" (200–600 mm) with 4–6 handles, use the model drawing to confirm the single-handwheel 350–600 mm geometry, sight glass DN pairing, and gasket compound before ordering.