When it comes to fluid control, silicone valves play a critical role in ensuring efficiency, precision, and leak-proof performance across industries. From food and beverage dispensing systems to medical devices, personal care packaging, and even automotive components, silicone valves are relied upon for their durability and flexibility. At Thesun Industry, we don’t just supply valves—we are a factory manufacturer with years of experience in custom service, OEM service, and high-quality silicone valve production. We understand the questions engineers, buyers, and brand owners often ask when selecting the right solution, which is why we’ve compiled this comprehensive guide.
Whether you are a product developer, a procurement officer, or a brand looking for dependable suppliers, this blog will help you understand what silicone valves are, their different types, production processes, and how to work with a professional factory like ours to customize solutions that fit your exact needs.
1. What Is a Silicone Valve?
A silicone valve is an elastic flow-control component, typically produced using liquid silicone rubber (LSR) injection molding. Its primary function is to regulate the passage of liquids, powders, or gases under preset pressure or vacuum conditions. Unlike rigid alternatives, silicone offers excellent flexibility, making it ideal for applications requiring consistent opening and closing under specific conditions.
2. What Types of Silicone Valves Are Available?
At Thesun Industry, we produce a wide range of valves, including:
- Silicone Check Valves – Prevent backflow in fluid or air systems.
- Duckbill Valves – Feature a tapered lip design for one-way sealing.
- Umbrella Valves – Allow bi-directional control under varying pressure.
- Flapper Valves – Provide simple one-way control using a flap design.
- Cross Slit Valves – Enable controlled dispensing with precision cuts.
- Dome Valves – Useful for applications requiring low-pressure actuation.
- Vent & Relief Valves – Maintain system balance by venting air or pressure.
- Dispensing Valves – Common in food packaging, ensuring no-drip dispensing.
This diversity ensures we can meet requirements across multiple industries and applications.
3. What Are the Applications of Silicone Valves?
Silicone valves are versatile and used in:
- Food & Beverage – ketchup bottles, sports caps, sauces, honey dispensers.
- Medical Devices – drug delivery systems, respiratory equipment, diagnostics.
- Personal Care – shampoo, lotion, cosmetic packaging with controlled flow.
- Automotive – fuel systems, ventilation, and liquid management.
- Home Appliances – cleaning dispensers, coffee machines, and filtration systems.
As a high-quality manufacturer, we support clients from concept to mass production, offering OEM service to integrate valves seamlessly into their final products.
4. What Are the Key Functions of Silicone Valves?
The primary purpose is flow regulation. A valve opens or closes automatically under certain pressure, ensuring controlled dispensing without leakage. Whether it’s dispensing a sports drink or maintaining pressure balance in a medical device, silicone valves ensure reliability and safety.
5. What Materials Are Used for Silicone Valves?
Choosing the right material depends on application:
- Food Grade Silicone – Safe for contact with consumables.
- Medical Grade Silicone – Biocompatible and certified for healthcare.
- Fluorosilicone (FVMQ) – Offers excellent chemical resistance.
- Rubber & Hybrid Compounds – Suitable for industrial use.
At Thesun Industry, we guide customers through material selection, ensuring compliance with relevant certifications (FDA, LFGB, ISO10993, etc.).
6. Why Is Silicone the Preferred Material?
Silicone rubber stands out for:
- Resistance to extreme temperatures (high and low).
- Strong durability against UV, chemicals, and weathering.
- Excellent elasticity, tear strength, and tensile properties.
- Long-term reliability with no deformation over repeated cycles.
This combination makes it the leading choice for manufacturers and suppliers worldwide.
7. How Are Silicone Valves Assembled?
Assembly methods include:
- Direct Integration into dispensing closures.
- With Plastic Valve Seats – The silicone valve is first seated and then installed.
As a factory, we provide both standard and custom service assembly solutions, depending on the client’s packaging or device design.
8. What Slit Cut Options Are Available?
The performance of a valve depends heavily on its slit design. We manufacture:
- Cross slit
- Snowflake
- I-shape
- Y-shape
- Custom slit cuts (based on drawings or samples)
Our OEM service allows customers to develop unique dispensing effects tailored to their product.
9. What Hardness Options Can Be Provided?
Silicone hardness ranges from 5 to 80 Shore A. For dispensing valves, we typically recommend 30, 40, or 50 Shore A, balancing flexibility and durability. Our engineers help customers choose the most suitable option during the design phase.
10. Why Choose Thesun Industry as Your Silicone Valve Manufacturer?
Unlike many suppliers, we are a factory offering one-stop service:
- In-house mold design & manufacturing
- Prototyping & small-batch runs
- Liquid injection molding & compression molding
- Strict quality control under ISO9001, ISO14001, ISO13485, IATF16949
- Flexible production lines to meet both low and high-volume demands
Our ability to combine advanced equipment with skilled engineers allows us to deliver high precision, high quality products at competitive costs.
11. Compression Molding vs. Liquid Injection Molding
- Compression Molding – Best for low-volume projects and cost-effective prototyping.
- Liquid Injection Molding (LIM) – Ideal for high-volume runs with consistent quality.
Both methods produce equally precise valves, but the choice depends on production scale.
12. How to Customize a Silicone Valve?
Clients can provide 3D drawings, CAD files, or actual samples. Key details such as opening pressure, closing pressure, application environment, and material help us optimize the design. For sensitive projects, we are open to signing confidentiality agreements (NDAs).
13. Lead Times for Production
- Samples – 7–10 days
- Mass Production – 15–35 days depending on complexity and volume
With streamlined operations and ERP/MES systems, we maintain punctual delivery schedules.
14. How Are Silicone Valves Tested?
Quality assurance includes:
- Leak-proof testing – 24-hour and 7-day inverted storage tests.
- Dispensing angle testing – Ensuring precision within ±15 degrees.
- Dimensional inspections – Using advanced metrology tools.
Our factory adheres to strict standards to ensure reliability in real-world use.
15. What Is the Typical Production Process?
A standard silicone valve process may include:
- LSR injection molding
- Initial inspection
- Secondary vulcanization (for performance stability)
- Slit punching
- Final inspection & trimming
- Packaging and shipment
Each stage is monitored under ISO-certified systems to guarantee high quality results.
Final Thoughts: Partnering With the Right Manufacturer
Choosing the right silicone valve is more than just selecting a shape—it’s about ensuring precision, durability, and performance. At Thesun Industry, we don’t just act as suppliers; we are a trusted factory partner, offering custom service and OEM service tailored to your needs. From material selection to final delivery, our commitment to high quality and one-stop manufacturing ensures your products achieve the reliability your customers expect.
If you’re looking for a professional manufacturer of silicone valves, reach out to us today. Let’s discuss your project, explore custom options, and build a solution that enhances your product performance while keeping costs efficient.
