Food Grade Internal Open Elliptical Manhole with Stainless Steel Handle
Manufactured from AISI 304 or AISI 316L stainless steel, this manway features smooth hygienic surfaces suitable for food-contact applications. The internal surface finish of Ra 0.5–0.8 μm supports effective manual cleaning and CIP processes, while the robust hand-wheel tightening system ensures reliable sealing under non-pressure or low-pressure operating conditions.
With multiple size options, gasket materials, and surface finishes available, this oval hygienic manway is a practical and cost-effective choice for sanitary tank access where hygiene, durability, and ease of operation are essential.
| Quantity: | |
|---|---|
Product Overview
In food and pharmaceutical plants, manways are opened frequently for inspection and cleaning, making hygiene, safety, and ease of use critical. Poorly designed access ports can trap residues, increase contamination risk, or complicate daily operations. Our Food Grade Oval Hygienic Manway is designed to address these challenges with a simple, proven, and sanitary structure.
The oval opening offers a wider access area than a round manway of similar height, reducing installation constraints and making it easier for operators to reach internal tank components. The outward-opening cover allows clear visibility and unrestricted access during cleaning and inspection tasks. Smooth edges and polished surfaces minimize dirt accumulation and improve operator safety.
Constructed from corrosion-resistant stainless steel, the manway withstands frequent washdowns and common cleaning agents used in food and pharmaceutical environments. When closed, the FDA-compliant gasket and evenly distributed hand-wheel clamping force provide a dependable seal for non-pressure and low-pressure applications, helping protect product integrity and maintain hygienic processing conditions.
Product Features
1. Space-Efficient Oval Design
Oval opening requires less vertical clearance than equivalent round manways
Provides comfortable access for inspection and cleaning
Ideal for tanks installed in height-restricted or compact production areas
2. Hygienic Stainless Steel Construction
Material options: AISI 304 (1.4301) / AISI 316L (1.4404)
Internal surface finish: Ra 0.5–0.8 μm
Seamless welding and smooth contours reduce residue buildup
Suitable for food, beverage, and pharmaceutical applications
3. Reliable Sealing for Non-Pressure Use
Maximum working pressure: 0.5 bar
Gasket options: EPDM, NBR, Silicone, FPM
All gasket materials comply with FDA 177.2600
Hand-wheel tightening system ensures uniform gasket compression
4. User-Friendly Operation
Outward-opening manhole cover for easy access
Available with plastic or stainless steel hand wheel
Simple structure for quick opening, closing, and maintenance
5. Flexible Sizes & Installation Options
Standard sizes: DN200 / 250 / 300 / 350 / 400 / 450 / 500 / 600
Height options: 100 mm / 120 mm / 150 mm
External surface finishes: mirror polish, matt finish, or sand-blasted
Suitable for welding or flange installation on sanitary tanks
Applications
Food & Beverage Industry
Storage tanks for dairy products, beverages, water, and edible oils
Mixing and blending vessels for syrups, sauces, and liquid ingredients
Manual inspection and cleaning access for hygienic tanks
Pharmaceutical & Related Processing
Process and storage vessels requiring sanitary access
Tanks used in low-pressure or atmospheric applications
Equipment requiring smooth surfaces and easy cleaning
Outward opening manhole cover
Plastic hand wheel or stainless steel hand wheel
Internal surface：Ra0.8μm-0.5μm
Outside surface: Mirror polish, Matt finish, sand-blasting finished.
Max. pressure：0.5bar
Gasket：EPDM 、NBR、SILICON、FPM conform to FDA177.2600
Height：100、120、150
Material：AISI304(1.4301)/316L(1.4404)
Size: 200/250/300/350/400/450/500/600
FAQ
Q1: What is the maximum working pressure of this manway?
A: This oval hygienic manway is designed for non-pressure and low-pressure applications, with a maximum working pressure of 0.5 bar. It is suitable for atmospheric tanks or vessels operating under slight internal pressure, such as storage tanks, mixing vessels, and process tanks. It is not intended for high-pressure applications.
Q2: Can the manway be installed on different types of tanks?
A: Yes. The manway can be installed on stainless steel or carbon steel tanks using either weld-on or flange-mounted installation, depending on the tank design. Proper alignment and surface preparation are essential to ensure hygienic sealing and reliable performance.
Q3: How often should the gasket be replaced?
A: Gasket service life depends on operating conditions, cleaning frequency, and chemical exposure. We recommend regular visual inspection every 6 months. Under normal food-processing conditions, gaskets typically require replacement every 1–2 years, or earlier if wear, deformation, or leakage is observed.
Q4: Is the manway suitable for CIP cleaning?
A: Yes. The manway features a smooth internal surface finish of Ra 0.5–0.8 μm and a crevice-minimized design, making it suitable for manual cleaning and standard CIP procedures commonly used in food and beverage processing. Proper cleaning protocols should be followed to ensure hygienic performance.
Q5: Are custom sizes available beyond the standard range?
A: Standard sizes are available from DN200 to DN600, with height options of 100 / 120 / 150 mm. Custom dimensions can be discussed based on tank design and application requirements. Please provide detailed tank drawings or opening dimensions so our technical team can evaluate feasibility and lead time.
-
WhatsApp -
Wechat
