Multi-Handwheel Round Handhole with Viewing Port

A round handhole combining a hinged cover, central viewing port and perimeter handwheel closures. The illustrated frame and cover have 304/316L options, with four listed drawing sizes from 200 to 300.

Connection	Welded tank collar
Reference material options	304 / 316L stainless steel
Cover & viewing port	Hinged round cover with central viewing port
Closure hardware	Perimeter handwheels and swing bolts
Listed dimensions & finish	200 / 219 / 250 / 300 (drawing Size)

Size

Request a quote View specifications

Viewing port and access cover

A bolted viewing assembly is mounted in the centre of the round cover, providing an observation window without opening the complete handhole. The cover also has a handle and hinge components. This combination distinguishes it from a solid-cover handhole and from a full-glass-cover manway.

Perimeter closure arrangement

Handwheels and swing bolts are arranged around the collar. The illustrated closure includes hubs, pins and retaining rings as well as the cover gasket. Compare the complete closure layout when identifying replacement components, and leave access around the perimeter so the operating points remain reachable.

Material and dimensional selection

The frame and cover list 304 or 316L stainless steel, while the illustrated gasket is silicone. The dimension chart contains four size entries: 200, 219, 250 and 300. Use the corresponding drawing row to compare outside diameter, collar height and thickness; the nominal size and collar outside diameter are separate fields.

Installation and maintenance access

The collar uses a welded tank connection. Plan the opening, viewing direction and space needed for the cover and handle together with surrounding pipework. Inspect the visible window, gasket seating area and closure components during routine maintenance, and specify replacement seals and window parts for the actual illustrated assembly.