Stainless Steel Pressure Round Sanitary Manhole

Product Overview

Stainless Steel Pressure Round Sanitary Manhole is a specialized access port designed for sanitary equipment (e.g., tanks, reactors, mixers) in food, beverage, and pharmaceutical industries, enabling safe personnel entry for inspection, cleaning, and maintenance. Its oval shape (vs. traditional circular manways) reduces installation height by 30–40%, making it ideal for facilities with limited vertical space, while the 316L stainless steel construction ensures corrosion resistance and compliance with strict hygienic standards. Key specifications include a standard size range of 400×600 mm to 800×1200 mm (oval dimensions), a working pressure of -0.1 to 1.0 MPa (vacuum to positive pressure), and a surface finish of Ra < 0.4 μm (electropolished) for wetted parts. It complies with FDA 21 CFR Part 177, EHEDG Type EL Class I, and ASME BPE standards, ensuring no cross-contamination risks in critical processes.

Product Features

• Space-Saving Round Design: The Round shape (width × height) requires 30% less vertical clearance than circular manways of equivalent access area, fitting into low-ceiling facilities (e.g., compact pharmaceutical cleanrooms) while still allowing easy personnel entry (suitable for operators up to 95th percentile body size).

• Ultra-Hygienic Construction: All wetted parts are made of 316L stainless steel with electropolished surfaces (Ra < 0.4 μm) to prevent bacterial adhesion; the door and frame feature a seamless, crevice-free design (no threaded connections) that eliminates dead zones and supports thorough CIP cleaning.

• Secure Sealing System: Equipped with a food-grade silicone rubber (for food applications) or FFKM (for pharmaceutical/high-temperature applications) gasket, compressed via a cam-lock or bolted closure system. The seal achieves a leak rate of <1×10⁻⁹ Pa·m³/s (helium leak test), ensuring airtightness for vacuum or pressure operations.

• Safety & Ergonomics: The door is equipped with a safety interlock (prevents opening under pressure/vacuum) and a gas spring for easy lifting (reducing operator effort by 60%); optional handrails and non-slip steps enhance safety during entry/exit.

• Customizable Options: Available with optional features such as viewing windows (borosilicate glass 3.3, pressure-rated), sampling ports (sanitary tri-clamp design), and SIP connections (for in-situ sterilization), adapting to specific process requirements.

Applications

• Food & Beverage Industry:

◦ Installed on large storage tanks (e.g., juice tanks, dairy silos) for periodic inspection of tank interiors and manual cleaning of hard-to-reach areas (e.g., tank corners).

◦ Used on mixing vessels for bakery ingredients (e.g., dough mixers) and beverage blending tanks (e.g., soft drink syrup mixers) to facilitate maintenance of agitators and sensors.

• Pharmaceutical Industry:

◦ Mounted on aseptic reactors (e.g., API synthesis reactors) and bioreactors (e.g., cell culture vessels) for sterile personnel entry during maintenance, with SIP compatibility ensuring post-maintenance sterility.

◦ Fitted on large-scale liquid preparation tanks for inspection of internal coatings (e.g., glass-lined surfaces) and verification of CIP effectiveness.