Sanitary check valves are one-way valves specifically designed for industries with high hygiene requirements, such as food, pharmaceuticals, and bioengineering. They are used to prevent backflow of media, thereby protecting the hygiene and safety of equipment and pipelines. Sanitary check valves are made of high-quality stainless steel with a precision-polished surface, ensuring a smooth, dead-angle-free fluid contact surface, and meeting food-grade hygiene standards (such as FDA and 3A standards).
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sanitary check valve Technical parameters
| Parameter | Content |
|---|---|
| Material | 304/316L Stainless Steel |
| Nominal Diameter (DN) | DN10~DN100 |
| Working Pressure | 0.1MPa~1.6MPa |
| Applicable Temperature Range | -20°C~150°C (up to 180°C for high-temperature applications) |
| Surface Treatment | Internal and External Polishing, Ra≤0.8μm |
| Connection Method | Clamp, Thread, Welding, Flange |
| Sealing Type | Soft Sealing (e.g., EPDM, PTFE), Metal Sealing |
| Applicable Medium | Pure Water, Medical Fluid, Food Fluid, Gas, etc. |
Features of Sanitary Check Valves
Superior Hygiene Performance
Made of 304 or 316L stainless steel, offering corrosion and contamination resistance, suitable for high-cleanliness environments.
Smooth, Seamless Design
The valve body is polished inside and out, eliminating stagnation zones and preventing the accumulation of impurities or bacteria.
Safe and Reliable
Sensitive valve opening and closing, with excellent sealing performance, ensuring no backflow of the medium.
Easy Disassembly and Cleaning
Designed to meet CIP/SIP (Cleaning in Line/Sterilization in Line) requirements, facilitating easy disassembly, cleaning, and maintenance.
High Temperature and Pressure Resistance
Maintains stable performance under high temperature and pressure conditions, suitable for steam sterilization environments.
Optimized Flow Path
Unobstructed flow path design, low pressure loss, and high medium flow rate.
Structure of a Sanitary Check Valve
A sanitary check valve mainly consists of the following components:
Valve Body
Made of high-quality stainless steel, precision machined and polished.
Valve Disc
Made of stainless steel or other high-strength, corrosion-resistant materials, providing rapid opening and closing and strong sealing.
Spring (Optional)
Used in some types for quick valve disc closure, increasing sealing performance.
Connection Ports
Typically available in clamp, threaded, welded, or flanged forms to suit different installation requirements.
Classification of Sanitary Check Valves
1. Classification by Structural Form
Lift-type Sanitary Check Valve
The valve disc moves up and down, suitable for low-velocity fluids.
Swing-type Sanitary Check Valve
The valve disc rotates around a hinge, suitable for high-velocity, high-flow-rate applications.
Spring-operated Sanitary Check Valve
The valve disc is driven to close by a spring, providing excellent sealing; commonly used in sanitary applications.
2. Classification by Connection Method
Clamp-type Check Valves
Quick assembly and disassembly, easy to clean, suitable for applications with high hygiene requirements.
Welded Check Valves
Good sealing performance, suitable for high-pressure environments.
Threaded Check Valves
Suitable for small-diameter pipelines, easy to install.
Flanged Check Valves
Commonly used in fluid pipelines with larger diameters.
Application Areas of Sanitary Check Valves
Food Processing
For fluid transportation and processing systems such as dairy products, juices, beverages, and beer.
Pharmaceutical Industry
Used for transporting high-purity media such as pharmaceutical solutions, pure water, and water for injection.
Biotechnology
Widely used in fermentation tanks, filtration equipment, purification devices, and other systems.
Cosmetics Industry
Prevents contamination and backflow during the transportation of ointments and liquids.
Other Industries with High Hygiene Requirements
Such as daily chemicals and fine chemicals.
Sanitary Check Valve Installation and Maintenance
Installation Precautions
Correct Flow Direction
Install correctly according to the flow direction arrow marked on the valve body.
Horizontal or Vertical Installation
Install on horizontal or vertical pipelines according to valve model requirements.
Pipeline Cleanliness
Ensure the pipeline is free of impurities before installation to avoid damaging the sealing surface.
Avoid Excessive Pressure Fluctuations
The pipeline system should avoid sudden pressure surges to extend valve life.
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