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GMP Grade

Micron Precision

OEM Stainless Steel Hopper, Manway Cover & Sanitary Valve Manufacturer

Integrated Manufacturing For Complex Sanitary Fluid Process Systems

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Our Products

Stainless Steel Hoppers, Tank Manway Covers & Sanitary Flow Equipment for Your Industry

Available in: SS304·SS316/316L·SS2205 Duplex — Custom Alloys on Request.

From stainless steel hopper funnels and tank manway covers to sanitary valves, piping and fittings — source your entire hygienic fluid system from a single certified manufacturer.

All Products
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Bag Filter

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Stainless Hopper Funnel

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Electric Ball Valve

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Actuated Valve

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Sanitary Diaphragm Valve

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Manway Cover

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Pioneering the Future of Sanitary Flow Equipment Manufacturing

Since 2014, HEYI has manufactured GMP-grade sanitary valves, hygienic fittings and stainless steel process equipment.
About Us

From butterfly valves and diaphragm valves to custom pressure equipment, every unit is produced, tested, and shipped in-house.

100000+ Units

Annual output of sanitary valves, fittings and process equipment

10+ Years

Manufacturing GMP-grade hygienic fluid handling components

5,000+ ㎡

Integrated factory — CNC machining, robotic drilling, laser welding

600+ Partners

System integrators and distributors served across 30+ countries

For Optimal Fluid Processing

Your Custom Sanitary Equipment Expert

Who We Are.

Based in China, HEYI is a direct manufacturer of stainless steel hoppers, tank manway covers, sanitary valves and hygienic fittings.

What We Stand For.

Every valve, fitting and equipments we ship must meet GMP, FDA and 3A hygienic standards. That means no dead zones in the flow path, mirror-polished internals, food-grade seals — and full material traceability from raw stock to finished product.

What Makes Us Different.

We carry large stock of standard products and ship in 1–7 days. We offer OEM customization with 15–35 day lead times. And we have invested in robotic arm drilling (±0.05mm positioning), integrated spinning forming and laser welding — technologies that cut delivery cycles by 30% and reduce cost by 25% compared to conventional methods.
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HEYI OEM Sanitary Valves, Fittings & Equipment Manufacturer FACTORY

The Engineering Behind Every Clean Surface

At HEYI, we integrate robotic automation with advanced forming technologies to eliminate hygiene risks and ensure micron-level accuracy for every sanitary flow component.
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3D Robotic Arm Accuracy

Our automated robotic system achieves a micron-level drilling accuracy of ±0.05mm, ensuring 100% consistency and perfect alignment that manual processes cannot match.

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One-Piece Spinning Excellence

By replacing traditional welding with seamless spinning, we create a smooth, crevice-free internal structure that eliminates bacterial traps and significantly extends equipment life.

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Trusted by Global Buyers Across 30+ Countries

We Are the Preferred Partner for Over 600 Global System Integrators, Distributors, and Manufacturers.
Across Southeast Asia, North America, the Middle East, and Europe, we deliver precision sanitary valves, fittings, and process equipment trusted in critical pharmaceutical and food processing environments.
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Italy Efficient Filtration for High-Viscosity Ink Lines

Delivered custom sanitary filters that improved impurity filtration efficiency, reducing processing time by 30% in their production line.
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South Korea Stainless Steel Hopper for Seamless Material Transfer

Provided spinning-formed stainless steel hoppers, achieving easy-to-clean material transfer, enhancing operational efficiency by 25%.
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Customized Tank Solutions for a Client in Poland

Supplied custom tank equipment meeting CE standard, ensuring reliable performance and on-time delivery for cross-continental projects.
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Your Trusted Expert in Sanitary Piping
& Control Systems

Tetch Hardware Blueprint

Pharmaceuticals & Bioprocessing

Ensure absolute sterility in your aseptic processes. We specialize in sanitary valves and flow components designed to eliminate biofilm and withstand rigorous CIP/SIP cycles, maintaining chemical inertness in high-purity pharmaceutical systems.

Tetch Hardware Blueprint

Food, Beverage & Dairy

Eliminate cross-contamination in your production lines. Our integrated spinning hoppers and smooth-bore sanitary fittings optimize flow for viscous media, reducing pressure drop while ensuring your equipment remains easy to sanitize and clean.

Tetch Hardware Blueprint

New Energy & Fine Chemicals

Maximize uptime when handling abrasive and corrosive lithium battery slurries. Our precision-engineered fluid control equipment offers superior chemical compatibility and mechanical sealing, ensuring long-term durability and safety in high-solids chemical processing.

Blogs & News

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Tri-Clamp Hopper Funnels: What They Are and How They Work

Tri-Clamp Hopper Funnels: What They Are and How They Work

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Two sanitary fittings in different applications

304 vs 316L Stainless Steel for Sanitary Fittings: Which Grade Do You Need?

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An infographic on sanitary diaphragm valves

Sanitary Diaphragm Valves Explained: Design, Applications

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    Start Your Sanitary Flow System Project

    Whether you're consolidating suppliers, chasing an urgent order, or specifying components for a new build — HEYI is ready to move with you. Share your requirements and our technical team will come back with pricing, stock availability and a delivery plan within 24 hours.
    • Extensive stock — urgent orders dispatched in 1–7 days
    • OEM custom manufacturing — engineered to your exact specs, delivered in 15–35 days
    • Precision-built for hygiene — mirror-polished internals, Ra ≤ 0.4μm, GMP-compliant
    • Committed to every order — samples available, full documentation, one-year warranty