Model No.: HWSV09
Outer Diameter: 21mm
Cross Slit Size: 10*10mm
Application: Fermented Soybean Paste
MOQ: 50,000pcs/ lot
Samples: Free Samples, Freight Collect
The 21mm rubber check valve is specifically engineered for dispensing high-viscosity products with particulate content, such as fruit pulp, crushed nuts, peanut butter, and soybean paste. Unlike conventional designs that simply scale up dimensions, this valve features a carefully optimized slit length, angle, and opening force to ensure smooth, controlled flow without clogging or irregular discharge.
To support consistent performance under repeated use, the valve incorporates a precisely balanced structure between the sidewall and top dome thickness. This structural optimization prevents deformation during squeezing while maintaining stable rebound behavior, ensuring reliable dispensing performance over extended cycles.
The cross-slit is manufactured using high-precision cutting technology, achieving near-zero gap sealing when the valve is in its resting state. This design guarantees excellent leak-proof performance, even in inverted packaging, effectively protecting product integrity during storage, transportation, and daily use.
For thick and sticky media, residue buildup at the nozzle is a common industry challenge that can lead to contamination or mold growth. The 21mm valve is engineered with fast elastic recovery, allowing it to close instantly after dispensing. This results in a clean cut-off with no stringing, dripping, or branching flow, significantly improving hygiene and user experience.
Material selection and processing also play a critical role in performance. The valve is produced using premium liquid silicone rubber (LSR) through precision injection molding, delivering high elasticity, chemical stability, and long-term durability. It complies with food-contact safety standards and ensures consistent quality across large production volumes.
With extensive experience in silicone valve development, Hopewell offers strong customization capabilities for this 21mm platform. Key parameters such as hardness, slit geometry, and structural dimensions can be tailored to match specific product formulations and packaging systems, making it an ideal solution for brands seeking reliable and high-performance dispensing of challenging viscous products.
Item Name | 21mm rubber check valve |
Material | FDA& LFGB Food Grade Liquid Silicone |
Process | Liquid Injection Molding |
Color | Clear |
Hardness | 30 Shore A |
Outer Diameter | 21mm |
Cross Slit Size | 10*10mm |
Application | Fermented Soybean Paste |
The 21mm rubber check valve is designed for high-viscosity and particulate-containing products, including:
1. Fruit jams with pulp or seeds
2. Peanut butter and nut-based spreads
3. Soybean paste and fermented sauces
4. Chili sauces with flakes or solids
5. Honey blends with inclusions
Thick cosmetic pastes (scrubs with particles, exfoliating creams)
It is widely used in:
1. Squeeze bottles for food packaging
2. Inverted dispensing containers
3. Controlled-flow caps for viscous products
4. Premium condiment packaging systems
The valve features an optimized cross-slit design and larger opening displacement, allowing solid particles to pass through without clogging while maintaining controlled flow.
No. The precision slit design ensures zero-gap sealing under no pressure, preventing leakage even in upside-down storage conditions.
Its fast rebound performance ensures immediate closure after squeezing, cutting off the flow cleanly and minimizing leftover material at the outlet.
Yes. Parameters such as silicone hardness, slit geometry, and wall thickness can be adjusted to match specific product formulations and packaging requirements.
The valve is made from high-quality liquid silicone rubber (LSR), compliant with food-contact safety standards, offering excellent durability and chemical stability.
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