17.5mm Silicone Umbrella Valve | One-Way Check Valve Supplier——YEJIA

17.5mm silicone umbrella valve is a high-performance one-way check valve designed for precise fluid and air control. Made from premium-grade silicone, it offers excellent flexibility, low opening pressure, and reliable sealing performance to prevent backflow and leakage.

Its compact structure and durable design make it ideal for applications in medical devices, beverage packaging, automotive venting systems, and electronic enclosures. With strong resistance to extreme temperatures, UV exposure, and chemical environments, this valve ensures long-term stability and consistent operation.

As a professional manufacturer, we provide custom LSR molding solutions to meet specific design, hardness, and performance requirements. Whether for food-grade, medical-grade, or industrial use, our 17.5mm silicone umbrella valves deliver high precision, reliability, and cost-effective performance for a wide range of industries.

Product Information

Advantages of 17.5mm Silicone Umbrella Valve

1. Reliable One-Way Sealing

The umbrella structure ensures precise one-way flow control, allowing fluid or air to pass in one direction while effectively preventing backflow and leakage.

2. Low Opening Pressure (High Sensitivity)

Thanks to the flexible silicone diaphragm, the valve can open under very low pressure, making it ideal for:

· Pressure relief systems

· Venting applications

· Sensitive fluid control devices

3. Excellent Sealing Performance

The soft silicone lip closely fits the valve seat, providing:

· Tight air/liquid sealing

· Strong leak-proof capability

· Consistent performance over repeated cycles

4. Compact & Space-Saving Design

The 17.5 mm size offers a balance between flow capacity and compactness:

· Easy integration into small assemblies

· Ideal for consumer products, medical devices, and electronics

5. Wide Temperature Resistance

Made from silicone, the valve can typically operate in:

· -40°C to 200°C+ environments

· Suitable for sterilization and harsh conditions

6. High Durability & Fatigue Resistance

The elastic recovery of silicone ensures:

· Stable performance after repeated opening/closing

Long cycle life with minimal deformation

Applications of 17.5mm  Silicone Umbrella Valve

1. Sauce Bottles

Used in high-barrier freshness-preserving bottle-in-bottle packaging systems with a collapsible high-barrier inner liner, helping extend freshness even after opening. 

The 17.5mm silicone umbrella valve allows air to flow only from inside the liner to the outside while preventing reverse airflow, thereby creating negative pressure. 

As the contents are dispensed, the inner liner gradually collapses into a thin and flat inner bag standing inside the bottle.

2. Medical & Healthcare Devices

The valve’s low opening pressure and reliable sealing make it ideal for:

· Respiratory and ventilation equipment

· Fluid control in medical tubing systems

· Diagnostic and drug delivery devices

3. Household Appliances

Ensures controlled fluid or air flow in everyday products:

· Coffee machines and water dispensers

· Washing machines and dishwashers

· Air purifiers and vacuum systems

4. Personal Care & Cosmetic Products

Ideal for clean and controlled dispensing:

· Lotion, shampoo, and gel packaging

· Cosmetic squeeze tubes

Hygienic, anti-contamination closures

Why Choose YEJIA as Your 17.5mm Silicone Umbrella Valve Manufacturer?

1. Deep Expertise in Silicone Valve Manufacturing

YEJIA has been specializing in silicone molding since 2009, with over a decade of experience in LSR injection molding, compression molding, and overmolding technologies.
This experience ensures:

· Stable valve performance

· Accurate cracking pressure control

· Reliable long-term sealing

2. High-Precision Mold Engineering

Precision is critical for umbrella valves. YEJIA offers:

· Micron-level mold tolerance (up to 0.001 mm) 

· Advanced mold flow analysis for optimized design

· Flash-free molding for consistent quality

This directly improves:

· Sealing reliability

· Flow consistency

· Product repeatability in mass production

3. Strong Customization Capabilities

Every application is different, especially for a 17.5mm valve used in dispensing or fluid control. YEJIA provides:

· Custom slit design, thickness, and hardness (Shore A) 

· Tailored opening pressure and flow rate

· OEM/ODM support from design to production

4. Advanced Production Facilities

YEJIA operates modern manufacturing with:

· Multiple LSR injection machines (30+ units) 

· Cleanroom workshops (Class 100,000)

· Automated punching and CCD inspection systems

This ensures:

· High-volume production capacity

· Clean, contamination-free products (important for food/medical use)

· Consistent quality across batches

5. Certified Quality System

YEJIA meets international standards, including:

· ISO 9001 (Quality Management)

· ISO 13485 (Medical Devices)

· IATF 16949 (Automotive)

· ISO 14001 (Environmental)

This makes them suitable for:

· Medical applications

· Food-grade dispensing systems

· Automotive components

6. Full-Service Solution (Design to Delivery)

YEJIA offers a one-stop solution, including:

· Product design & engineering support

· In-house mold making (fast lead time: ~7–10 days)

· Sampling, testing, and mass production

This reduces:

· Development time

· Communication cost

· Risk during product launch

7. Proven Global Supply Capability

With exports to multiple regions and an established supply chain, YEJIA provides:

· Stable delivery timelines

· Experience with international clients

Scalable production for large-volume orders

FAQ

1. What is a 17.5mm Silicone Umbrella Valve?

A 17.5mm Silicone Umbrella Valve is a type of one-way (check) valve made from flexible silicone rubber, designed with an “umbrella-shaped” diaphragm and a nominal diameter of 17.5 mm. The valve consists of a thin, dome-shaped sealing head attached to a stem. It’s typically installed into a seat or orifice. When pressure is applied from one side, the “umbrella” lifts to allow flow; when pressure stops or reverses, it closes tightly to prevent backflow.

2. What materials are used for the 17.5mm Silicone Umbrella Valve?

The valve is typically made from liquid silicone rubber (LSR), available in: Food-grade silicone; Medical-grade silicone; Industrial-grade silicone. 

Material selection depends on the application requirements.

3. Is the valve suitable for food or medical use?

Yes, if produced with certified materials. Food-grade and medical-grade silicone can comply with relevant standards such as FDA or ISO requirements, making the valve safe for sensitive applications.

4. Can YEJIA customize the size and slit design of silicone valves?
Yes, we offer full customization, including valve size, slit type, hardness, and coating options, to meet your specific product requirements and packaging compatibility.

5. Are 17.5mm Silicone Umbrella Valve food grade?

Yes. High-quality silicone valves are typically made from food-grade silicone, which complies with standards such as FDA, LFGB, or other international food safety regulations.

6. What are the advantages of 17.5mm Silicone Umbrella Valve?

·  Excellent sealing performance

·  Fast response to pressure changes

·  Wide temperature resistance (-40°C to 200°C)

·  Chemical and aging resistance

·  Long service life

·  Maintenance-free operation

7. How does YEJIA ensure the quality and consistency of 17.5mm Silicone Umbrella Valve?
YEJIA implements strict quality control at every production stage, including material inspection, precision molding, coating application, and final performance testing to ensure consistent flow, anti-drip functionality, and durability.

8. What is the MOQ for custom silicone valves?

The minimum order quantity (MOQ) for custom silicone valves depends on the valve size, mold design, and production process. YEJIA provides prototype testing samples before mass production to ensure proper performance and compatibility with your packaging system.