Inward-Opening Bevel-Edge Oval Manway with Arch Bracket

An inward-opening oval stainless steel manway featuring a sloped bevel-edge welding frame, a cross-arch bridge bracket, a curved suspension arm, and a central spanner handle. Listed in 304 or 316L across four drawing sizes from 550×450 to 580×485.

Connection	Butt-weld bevel-edge oval neck frame
Material options	304 or 316L frame and cover; silicone gasket; 304 hardware with 304/ABS hub
Closure structure	Inward-opening oval cover with cross-arch bracket, curved suspension arm, and central spanner handle
Shape	Oval with sloped bevel-edge collar
Size range	550×450 / 550×450A / 565×465 / 580×485 (drawing Size)

Size

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Inward-Opening Cover and Arch Bridge Assembly

The oval cover seats from the interior side against a perimeter gasket inside the sloped bevel-edge neck frame. Externally, a rigid arch bracket spans the minor axis between two support lugs, while a curved gooseneck suspension arm pivots from a rim hinge hub to support the cover at its center.

Central Spanner Handle and Component Materials

A central threaded stud fixed to the cover passes through the arch bracket and tightens with a three-spoke stainless steel spanner handle to draw the lid against the gasket. The parts list specifies 304 or 316L for the frame and cover, silicone for the gasket, 304 for the bracket, arm, stud, lugs, and nuts, and 304/ABS for the hinge hub.

Bevel-Edge Frame Dimensions

The dimensional drawing covers four oval configurations: 550×450, 550×450A, 565×465, and 580×485. Notably, 550×450 and 550×450A share the same opening dimensions and 80 mm collar height but differ in collar wall thickness (5 mm versus 4 mm), while the larger sizes step up in collar height. Compare the complete drawing row for your selected size when planning the tank cutout.

Internal Swing Clearance and Selection

Because the cover moves inward on its curved suspension arm before rotating through the oval opening, verify internal tank clearance around agitators, coils, or baffles. Confirm the exact cutout dimensions, collar wall thickness (4 vs 5), and gasket material before fabrication.