Multi-Handwheel Round Manway with Central Sight Glass

An outward-opening round stainless steel manway featuring a central bolted sight glass, side lift handle, and perimeter swing-bolt handwheels. Listed in 304 or 316L across eight drawing sizes from 200 to 600 with DN50 to DN100 viewing ports.

Connection	Butt-weld round neck collar
Material options	304 or 316L frame and cover; silicone gasket; 304 hardware with SS304/ABS/ring handwheels
Closure structure	Outward-opening hinged cover with central sight glass (DN50–DN100), handle, and 4–8 swing-bolt handwheels
Shape	Round
Size range	200 / 300 / 350 / 400 / 430 / 450 / 500 / 600 (drawing Size)

Size

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Hinged Cover with Central Viewing Port

The assembly combines a cylindrical butt-weld neck frame with an outward-opening circular cover, an upper-and-lower side hinge pair secured by a hex screw and dual nuts, a welded top lift handle, and a central flanged sight glass port for interior vessel observation.

Perimeter Swing-Bolt Closure Hardware

Around the collar rim, four to eight swing bolts pivot on welded hubs with pins and snap rings, engaging matching handwheels offered in SS304, ABS, or ring styles. The parts list specifies 304 or 316L for the frame and cover, 304 for the hardware and sight glass flange, and silicone for the gasket.

Drawing Sizes and Sight Glass Pairing

The dimension chart covers eight nominal sizes—200, 300, 350, 400, 430, 450, 500, and 600—with outer diameters from 206 to 606, a 100 collar height, a 3 neck thickness, and a 2.5 or 3 cover thickness. Sight glass ports scale from DN50 (size 200) and DN65 (size 300) to DN80 (350–450) and DN100 (500–600).

Selection and Order Checks

Collar height and wall thickness can be customized on request, and the series specification also notes EPDM, FKM, or NBR elastomer options. Before ordering, confirm the exact handwheel style and count for the chosen diameter, and verify the viewing window lens specification.