Overview
Our 13 mm miniature check valves are custom-engineered liquid silicone rubber (LSR) components designed for leak-proof, one-way flow control in cap-lid applications — including sports bottles, condiment caps, cosmetic closures, and medical sample vials. Manufactured by precision LSR injection molding and micro-slit / micro-cut finishing, each valve delivers reliable opening/closing performance, low residual drip, and broad chemical and temperature resistance. Fully customizable in slit geometry, hardness, and actuation characteristics, these miniature valves are optimized for tight packaging tolerances and scalable OEM production.
Basic Information
| Item | Details |
|---|---|
| Place of Origin | Xiamen, China |
| Product Name | 13 mm Miniature LSR Check Valve for Cap Lids |
| Brand | OEM / White Label |
| Material | 100% Food-grade Liquid Silicone Rubber (LSR) |
| Shape | Cross-slit / Duckbill / Snowflake / Custom micro-slit |
| Nominal Size | 13 mm (outer diameter) — custom sizes available |
| Hardness | Shore A 20–70 (customizable) |
| Color | Transparent, translucent, or custom colors |
| Molding Process | LSR Injection Molding + Micro-slit Cutting / Laser Trimming |
| Certifications | ISO 9001, FDA, LFGB, RoHS (per customer spec) |
| MOQ | Small orders accepted |
| Sample Lead Time | 5–7 business days |
| Production Lead Time | 20–25 business days (typical) |
| Packaging | Protective trays, custom export cartons |
| OEM Services | Fully supported — design, tooling, testing, branding |
Key Benefits
- Precisely sized 13 mm footprint for compact cap and lid assemblies.
- One-way, anti-drip sealing with fast, repeatable opening/closing response.
- Food-grade LSR ensures chemical inertness, odorless performance, and wide temperature tolerance.
- Fully customizable slit geometry and opening pressure to match fluid viscosity and user experience.
Quality Assurance
- Raw Material Control: LSR batches verified for FDA/LFGB compliance and lot traceability.
- Dimensional & Visual Inspection: 100% sample checks using high-resolution optical projectors and CMM.
- Functional Testing: Opening pressure, flow-rate calibration, leak-proof and backflow tests under variable pressure differentials.
- Durability: Compression fatigue cycles and long-life actuation testing to validate millions of cycles when required.
- Environmental Validation: Thermal cycling and chemical resistance tests to confirm stability from –40 °C to +200 °C (custom ranges available).
All production and final inspections are executed under ISO 9001 procedures with full batch traceability and documented QC reports.
Factory Capabilities
Our production facility integrates automated LSR injection molding presses with precision steel tooling, CNC mold machining, mirror EDM, and high-precision micro-slit cutting/laser trimming equipment to achieve consistent 13 mm valve geometry. In-line inspection and verification use 3D optical projectors, automated leak testers, durometers, and elasticity analyzers. Backed by ISO and IATF standards, we support rapid prototyping, small-batch validation runs, and high-volume OEM manufacturing with controlled cleanroom workflows and turnkey logistics.
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