Multi-Handwheel Oval Manway with Central Sight Glass

An outward-opening oval stainless steel manway featuring a side hinge, a welded lift handle, a central bolted sight glass, and perimeter swing-bolt handwheels. Detailed in two drawing sizes: 250×400 and 300×400.

Connection	Butt-weld oval neck collar
Material options	304 or 316L frame and cover; silicone gasket; 304 hardware with 304/ABS/ring handwheels
Closure structure	Outward-opening hinged oval cover with central sight glass, side handle, and perimeter handwheels (6 shown in drawing)
Shape	Oval
Size range	250×400 / 300×400 (drawing Size)

Size

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Hinged Oval Lid with Central Viewing Port

The assembly pairs a butt-weld oval neck collar with an outward-opening oval cover that pivots on upper and lower hinge lugs at one end of the major axis, carries a welded grab handle at the opposite end, and mounts a circular bolted sight glass at the center of the lid.

Perimeter Handwheels and Component Materials

Six perimeter swing-bolt handwheel assemblies are distributed around the oval rim in the drawing views. The parts list specifies 304 or 316L stainless steel for the frame and cover, a silicone perimeter gasket, 304/ABS/ring options for the handwheels, and 304 stainless steel for the hubs, pins, snap rings, hinges, and sight glass flange.

Drawing Dimensions for 250×400 and 300×400

Two sizes are tabulated in the drawing chart: 250×400 (OD 250×400, collar height H=90, bolt spacing L=150, collar thickness t=4, cover thickness t1=4) and 300×400 (OD 300×400, H=90, L=100, t=4, t1=4), with height H and collar thickness t customizable on request.

Selection and Specification Checks

The series also lists EPDM, Viton, and NBR seal options in its general table. Before ordering, confirm the exact sight glass port bore and lens material, handwheel style, and whether 250×400 or 300×400 matches your vessel opening.