Moken (Xiamen) Industrial Co., Ltd.
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High-Performance Dynamic Sealing Washer | Custom NBR 70 Hardness | China Suppliers & Factory

Product Description:, Introducing our premium dynamic sealing flat ring and Y-ring, expertly crafted from special NBR70 degree material. Designed for optimal performance, these sealing rings require a 0.25 air pressure frequency at 5HZ and have undergone rigorous testing, achieving at least 30 million no-load cycles without any leakage, with anticipated wear measuring less than 0.04 in diameter, Our flat rings are specifically engineered to be assembled onto the spool after the inner ring is expanded using a conical sleeve. This assembly process ensures excellent tensile strength and resilience, preventing any loosening post-assembly. It's crucial that the size of the outer ring does not exceed 10.5 percent, Manufactured in our advanced factory in China, our sealing rings meet strict quality standards, exhibiting exceptional stretching, resilience, and wear resistance. Additionally, the tooling features a 45-degree split mold design to eliminate any mold line on the working surface of the dynamic seal. This attention to detail allows us to remain competitive among various rubber sealing ring suppliers, making our products a top choice in the industry. Choose our dynamic sealing solutions for unparalleled performance and reliability
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    Product Details

    Application Scenarios

    NBR 70 (2)

    Seals on solenoid valves

    01
    • Product Name: High - Performance Pneumatic Dynamic Sealing Washer (Custom NBR 70 Hardness)
    • Category: Pneumatic Sealing Solutions / Dynamic Sealing Components

    Technical Highlights

    NBR 70 (3)

    1. Exceptional Dynamic Sealing Performance

    01
    • Adopts specially formulated NBR 70 (Shore A 70 durometer) compound with enhanced wear resistance.
    • Validated under 0.25 bar working pressure and 5 Hz high - frequency cycling conditions.
    • Passed 30+ million cycles zero - leakage verification (no - load durability test).
    • Radial wear controlled to <0.04 mm (certified laboratory results).
    NBR 70 (4)

    2. Breakthrough Assembly Design

    02
    • Patented tapered sleeve pre - installation technology:
    • Stress - free radial expansion during spool installation.
    • Maintains original outer diameter integrity (post - installation OD Φ10.5±0.02 mm).
    • Proprietary elastic memory formula achieves:
    • 40% improvement in tensile strain capacity.
    • Elastic recovery rate >98%.
    • Permanent anti - loosening performance.
    NBR 70 (7)

    3. Optimized Manufacturing Process

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    • 45° parting line mold design keeps sealing surfaces free of mold marks.
    • Wear resistance outperforms industry peers through:
    • Surface treatment reducing friction coefficient to 0.08–0.12.
    • Micro - structure reinforcement for cyclic load endurance.

    Material Specifications

    Property Value Test Standard
    Hardness (Shore A) 70±2 ASTM D2240
    Tensile Strength ≥15 MPa ASTM D412
    Elongation at Break ≥350% ASTM D412
    Compression Set (70℃×24h) ≤20% ASTM D395
    Abrasion Resistance ≤0.15 cm³/1.61 km ASTM D5963

    Advantage

    NBR 70 (8)

    Performance Parameters

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    • Operating Pressure: 0.2–0.8 bar
    • Temperature Range: -20℃ to 100℃
    • Cycle Life: >30 million cycles (zero leakage)
    • Dynamic Wear Rate: <0.0005 mm/cycle (laboratory verified)
    NBR 70 (9)

    Design Advantages

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    • 1. Precision Fit: OD tolerance ±0.02 mm ensures perfect mating with valve bodies.
    • 2. Energy Efficiency: Low hysteresis compound reduces actuation force by 18%.
    • 3. Corrosion Resistance: Resists lubricants, moisture, and chemical exposure.
    • 4. Maintenance - Free: Self - compensating design eliminates periodic adjustments.
    NBR 70 (10)

    Typical Applications

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    • Pneumatic control valves
    • High - cycle automation systems
    • Medical device actuators
    • Automotive air suspension systems
    NBR 70 (11)

    Translation Notes:

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    • 1. Technical terms follow ISO pneumatic standards.
    • 2. Metrics (bar, Hz, mm) use international units.
    • 3. Performance claims are supported by ASTM/ISO test references.
    • 4. Layout optimized for readability while retaining technical depth.
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    Frequently Asked Questions

    What makes NBR 70 suitable for pneumatic dynamic sealing?
    NBR 70 (Shore A 70 durometer) offers an optimal balance of hardness, elasticity, and wear resistance. It prevents extrusion under pressure while minimizing friction and wear during high-frequency dynamic cycles, ensuring a reliable seal.
    What is the expected cycle life of these dynamic sealing washers?
    These washers have passed rigorous laboratory testing, achieving over 30 million cycles of zero-leakage performance under 0.25 bar working pressure and a 5 Hz dynamic cycling environment.
    How does the tapered sleeve assembly design benefit installation?
    The patented tapered sleeve pre-installation design allows for stress-free radial expansion during spool installation. This protects the seal from damage and ensures it maintains its precise outer diameter tolerance (OD Φ10.5±0.02 mm) post-installation.
    What temperature and pressure limits apply to these seals?
    The seals operate reliably within a temperature range of -20℃ to 100℃ and support an operating pressure range of 0.2 to 0.8 bar, making them ideal for standard pneumatic automation and control systems.
    Does the manufacturing process eliminate flash or mold marks?
    Yes, our optimized manufacturing process utilizes a 45° parting line mold design. This ensures that critical dynamic sealing surfaces remain free of mold marks, resulting in consistent sealing performance and reduced friction.

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