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AOMITE Beer Brewing Equipment Manhole Cover of Milk Tank SS304 Mirror Polishing Beer Tank Manhole Cover 300mm

SS304/316L Sanitary Round Manhole Cover (Pressure Tank Manway, DN150-DN800)

Ensure secure, hygienic, and convenient access to the interior of your pressurized tanks with the Aomite Sanitary Round Manhole Cover (Tank Manway).

Engineered specifically for pressure vessels in the brewery, dairy, and pharmaceutical industries, this robust access door provides operators with a safe entry point for routine inspection, CIP cleaning, and maintenance. The cover is secured by heavy-duty ergonomic handwheel knobs that evenly distribute pressure across the food-grade gasket (available in Silicone, EPDM, NBR, or FPM), ensuring an absolute, leak-proof seal under pressure. To eliminate bacterial dead legs, the interior surface is precision-polished to a strict Ra ≤ 0.8μm finish. Available in a comprehensive range of sizes from DN150 to DN800 (such as our featured DN400 model), with customizable collar heights and cover thicknesses to perfectly match your vessel's specifications.

Quantity:
Size:	DN400
Material:	SS304
Availability:





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Model:
MH002

Product Description

Technical Specifications

Parameter	Specification
Product Type	Sanitary Round Manhole Cover / Tank Access Manway
Metal Material	SS304 (1.4301) or SS316L (1.4404) Stainless Steel
Available Sizes	DN150 through DN800 (Featured Standard Size: DN400)
Gasket / Seal Options	Silicone, EPDM, NBR, or FPM (Viton) - Food Grade
Internal Surface Finish	Ra ≤ 0.4 ~ 0.8 μm (Mirror Polished for optimal hygiene)
External Surface Finish	Mirror Polished, Matte, or Sand-blasted (Customizable)
Locking Mechanism	Heavy-duty threaded handwheel knobs (Qty depends on size)
Customization	Collar (Frame) height and cover thickness can be customized to your exact requirements
Primary Application	Top or side access doors for Pressure Vessels, Beer Fermenters, and Milk Silos

What is the difference between Round, Oval, and Rectangular Tank Manways?

Round Manways (This Product)
Typically installed on the top or upper side of pressurized tanks. The round shape evenly distributes internal pressure, making them the standard choice for most sanitary pressure vessels and fermenters.
Oval Manways
Usually installed on the lower side of the tank. They are designed to open inward so that the internal liquid pressure naturally pushes the door tighter against the gasket, creating an even stronger seal.
Rectangular Manways
Commonly used as side-access doors on non-pressurized tanks (like brewery mash tuns) for raking out spent grain, where large, unhindered access is more important than high-pressure retention.

Why does this manway use multiple handwheel knobs instead of a single clamp?

Even Pressure Distribution: On large diameters (like DN400 or DN800), a single locking point cannot compress the gasket evenly. Multiple handwheel knobs ensure uniform clamping force around the entire circumference, preventing leaks under high internal pressure.
Safety & Gradual Release: When opening a pressurized tank, operators can gradually loosen the knobs. This safely bleeds off any residual pressure before the cover is fully swung open, protecting the operator from sudden bursts.