Sanitary Mix-Proof Butterfly Valve Stainless Steel Manual

July 30, 2025

Model NO.: YH-DF002
Working Temperature: Normal Temperature (-40°C < T < 120°C)
Material of Seal Surface: Soft Sealed
Valve Body: Forged Welding
Application: Industrial, Water Treatment, Household, Food, Beer, Beverage, Milk, Pharmaceutical
Standards: DIN, SMS, 3A, ISO
Size: DN40 - DN100 (1" - 4")
Trademark: Yeahoo
Specifications: CE, ISO
Origin: Wenzhou, Zhejiang, China
HS Code: 8481804090
**Applications** The Mix-proof Valve is a sanitary type manual butterfly valve designed based on a mature technology platform. It is widely used in direct piping systems to prevent cross-contamination and pollution when the sealing surface is damaged. This valve is primarily applied in industries such as dairy, beverage, food, biotechnology, pharmaceuticals, and personal care. **Operating Principle** This manually operated butterfly valve typically remains in a closed position (NC). The valve consists of a main body, two sealing rings, two valve plates, and one or two mini-type valves (such as a drain valve or a CIP cleaning valve). The main valve features two seal rings and two plates that form a leakage cavity. Any leaking fluid is collected in this cavity and discharged through the drain valve. Before opening the main valve, the leakage cavity must be cleaned first. When the main valve is open, the auxiliary valve closes. **Technical Data**
Metal Material Product Wetted 304L/316L (1.4307/1.4404) Forged
Non-Product Wetted 304 (1.4301)
We can provide EN 10204 3.1B Certificate.
Seal Material Standard EPDM. All seal materials comply with FDA 177.2600.
Options NBR, FPM, Silicone. All seal materials comply with FDA 177.2600.
Temperature Continuous Working Temperature -20~+135ºC (EPDM)
Sterilization Temperature 150ºC (max 20min)
Pressure Working Pressure 0~10bar (standard)
Control Air Pressure 5~8bar
Surface Treatment Internal Surface Ra ≤ 0.8μm
External Surface R ≤ 1.6µm
Connection Connection Standards Welding End: DIN 11850 series 0, 2
Welding End: Inch Pipe Standard
Connection Methods: Welding, Thread, Clamp, Flange
If you have any questions, feel free to contact us. We are a professional manufacturer in this field for over 10 years and will respond within 24 hours. We look forward to a sincere cooperation with you. We are a professional manufacturer and supplier of high-precision sanitary valves, pipe fittings, connecting components, precision forging, forged valves, and OEM parts. These products are used in various industries including food, beverage, pharmaceuticals, biotechnology, water treatment, cosmetics, petroleum, and chemical sectors. Our advantages include forging, heat treatment, and machining processes. We are equipped with many advanced testing equipment, such as dimensional measuring machines, spectroscopic analyzers, hardness testers, and optical instruments. Our team of experts in management and technology strictly designs and produces our products according to standards like BPE, DIN, SMS, 3A, IDF, RJT, ISO, and BS. Every step from raw material to finished product is tested to ensure quality control. So far, we have obtained the ISO 9001 quality control system certification, CE safety certification, and passed SGS inspection.

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