Product Description
Medical Syringe Plunger Seal is a precision-engineered pharmaceutical component designed specifically for disposable syringes, prefilled drug delivery systems, and advanced medical injection devices. Manufactured from pharmaceutical-grade elastomers including medical silicone and specialized rubber compounds, it delivers exceptional drug compatibility, consistent injection force characteristics, and absolute leakage prevention for critical medication delivery applications.
Unlike standard industrial seals, Best Seal Medical Syringe Plunger Seals feature advanced multi-rib sealing geometry that ensures superior medication containment throughout storage and administration, while precision molding technology guarantees ±0.02mm dimensional accuracy for consistent, reliable performance across millions of injection cycles.
Multi-rib sealing design + pharmaceutical-grade materials + ISO Class 7 cleanroom manufacturing = Zero contamination risk, perfect for sterile drug delivery including vaccines, biologics, and insulin formulations.
Technical Parameters
| Property | Unit | Value |
| Origin | - | Xiamen, China |
| Material | - | Medical-Grade Silicone (VMQ), Butyl Rubber (IIR), Bromobutyl (BIIR), Chlorobutyl (CIIR), TPE |
| Hardness Range | Shore A | 30 – 80 (Application-specific) |
| Operating Temperature | °C | -40 to +200 |
| Dimensional Tolerance | mm | ± 0.02 |
| Compatible Syringe Sizes | - | Custom (1ml–60ml standard configurations) |
| Colors | - | Natural (translucent), gray, black, or custom |
| Testing Available | - | ISO 10993 & USP Class VI upon project request |
Material Options
Pharmaceutical-Grade Elastomer Materials：
| Material | Key Properties | Best Applications |
|---|---|---|
| VMQ (Medical Silicone) | Superior biocompatibility, extreme temperature stability | General-purpose syringes, prefilled systems, wide pH range |
| IIR (Butyl Rubber) | Exceptional gas barrier properties, low moisture permeability | Oxygen-sensitive drugs, vaccines, extended shelf-life products |
| BIIR (Bromobutyl) | Enhanced chemical resistance, improved curing | Aggressive pharmaceutical formulations, chemotherapy agents |
| CIIR (Chlorobutyl) | Excellent drug compatibility, low extractables | Lyophilized drugs, sensitive biologics, high-value therapeutics |
| TPE (Medical Grade) | Customizable hardness, thermoplastic processing | Specialty applications, unique performance requirements |
Surface Treatment Options：
| Surface Treatment | Benefits | Applications |
|---|---|---|
| PTFE (Teflon) Coating | Ultra-low friction coefficient, exceptional chemical inertness | Prefilled syringes, high-precision dosing, viscous formulations |
| Silicone Oil Lubrication | Smooth injection feel, biocompatible lubricant | Biologic delivery, patient self-injection devices, insulin pens |
| Baked Silicone Coating | Permanent lubrication, no migration, autoclave stable | Sterilized prefilled systems, long-term storage |
| Uncoated (Natural) | Zero additive contamination risk | Preservative-free medications, sensitive formulations |
Silicone (VMQ): Best for broad chemical compatibility and temperature extremes
Butyl (IIR/BIIR/CIIR): Essential for oxygen-sensitive medications, vaccines
Our pharmaceutical engineering team provides FREE consultation for optimal material selection.
Key Features & Advantages
- ❶ Ultra-Precision Manufacturing: ±0.02mm tolerance ensures perfect barrel fit and eliminates micro-leakage pathways
- ❷ Multi-Rib Sealing Design: Dual or triple sealing ribs create redundant sealing zones, preventing medication migration
- ❸ Pharmaceutical-Grade Surface: Ra ≤0.4μm finish minimizes friction while preventing particulate generation
- ❹ Optimized Injection Force: 8–15N consistent glide force provides 35% improvement in patient comfort
- ❺ Regulatory Documentation: ISO 10993 & USP Class VI biocompatibility testing upon project request
- ❻ Chemical Compatibility: Extensive testing with pharmaceutical excipients and active ingredients
- ❼ Extractables Control: Low-extractable formulations minimize drug interaction risks
Main Applications
- Disposable Medical Syringes: 1ml–60ml standard syringes, insulin syringes, tuberculin syringes, specialty injection systems
- Prefilled Syringe Systems: Vaccines (COVID-19, influenza, pediatric), biologics, emergency medications (epinephrine, naloxone)
- Advanced Drug Delivery Devices: Auto-injectors, safety syringes, pen injector cartridges, wearable injection devices
- Hospital & Clinical Settings: Operating room procedures, emergency medicine, patient-controlled analgesia, chemotherapy
- Laboratory Equipment: High-precision liquid handling, analytical sample preparation, biotechnology research
- Veterinary Medicine: Animal vaccination programs, livestock medication delivery, companion animal therapeutics
Packaging & Shipping
📦 Packaging Options：
| Type | Details |
|---|---|
| Standard Packaging |
Cleanroom-sealed PE bags with double-bag protection Inner cartons with protective layers Export-quality palletization for bulk shipments |
| Custom Packaging (Upon Request) |
Individual heat-sealed pouches Thermoformed protective trays Vacuum-sealed aluminum foil barrier pouches Customized labels with batch tracking |
| Sterilized Options | Gamma-sterilized (25–50 kGy) or EtO sterilized ready-to-use packaging available |
🚚 Shipping Information
| Item | Details |
|---|---|
| MOQ | 1 pcs |
| Lead Time | In stock: 3-5 days | Standard: 2–3 weeks | Custom mold: 4–6 weeks | Sterilized: Add 2–3 weeks |
| Port | Xiamen, China |
| Shipping Methods | Express (DHL, FedEx, UPS), Air Freight, Sea Freight |
| Trade Terms | FOB / CIF / DDP / EXW available |
| Sample Policy | Free samples available (customer pays freight) | Fast quotation within 24 hours |
Comprehensive OEM & ODM services available to meet your specific requirements.
Customer Reviews
Factory Strength & Quality Assurance
Xiamen Best Seal Imp. & Exp. Co., Ltd. has over 20 years of experience manufacturing precision medical-grade elastomer components. We specialize in high-precision syringe plunger seals and custom pharmaceutical sealing solutions for the global healthcare industry.
Quality Certifications: ISO 9001:2015, RoHS, REACH, FDA-compliant materials
Frequently Asked Questions
Q: What syringe sizes are compatible with your plunger seals?
A: We manufacture precision plunger seals for all standard syringe formats from 1ml to 60ml, with custom sizes available for specialty applications. Send your technical drawings for a precise quotation within 24 hours.
Q: Which material should I choose for my drug formulation?
A: Material selection depends on your drug formulation:
Silicone (VMQ): Best for broad chemical compatibility and temperature extremes
Butyl Rubber (IIR): Ideal for oxygen-sensitive drugs and extended shelf-life
Bromobutyl/Chlorobutyl: For aggressive formulations and biologics
Our pharmaceutical engineering team provides FREE consultation for optimal selection.
Q: Do you provide regulatory documentation for pharmaceutical submissions?
A: Yes. ISO 10993 and USP Class VI biocompatibility testing reports are available upon project request to support your regulatory submissions (FDA, EMA, etc.). Drug Master File (DMF) support is also available.
Q: Can you supply pre-sterilized plunger seals ready for aseptic filling?
A: Yes. We offer gamma-sterilized (25–50 kGy) plunger seals in cleanroom packaging, ready for aseptic filling lines. EtO sterilization available for radiation-sensitive materials. Lead time: add 2–3 weeks to standard production.
Q: What is the minimum order quantity?
A: There is no MOQ. We support orders from 1 piece, including sampling, R&D testing, validation studies, and mass production. Pricing depends on specifications and requirements.
Q: Do you offer custom formulation development services?
A: Yes. Our R&D team specializes in custom elastomer formulations for specific drug compatibility, unique hardness requirements, specialized color matching, or distinctive performance characteristics. Proprietary formulations available.
Q: How do you ensure consistent quality across production batches?
A: Quality consistency maintained through statistical process control, 100% automated optical inspection, dimensional verification on every batch, material certification, complete traceability systems, and rigorous validation protocols. Every batch includes a certificate of analysis.
📞 Contact Us Today
Xiamen Best Seal Imp. & Exp. Co., Ltd.
📍 Address: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, China
☎️ Tel: +86-592-5782315
📱 Mobile/WhatsApp: +86 189 5015 9396
📧 Email: yunying2@bestsealhk.com
Free Sample Kit • 24-Hour Quotation • Custom Solutions • OEM/ODM Services
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