High - Performance Pneumatic Dynamic Sealing Washer (Custom NBR 70 Hardness)

Dynamic sealing flat ring and Y-ring is special NBR70 degree material, need 0.25 air pressure frequency 5HZ, no load test at least 30 million times without leakage (expected wear less than 0.04 diameter)
Flat ring needs to be assembled to the spool after expanding the inner ring with a conical sleeve, which requires good tensile and resilience of the product, the outer ring is not supported after assembly, and the flat ring can not be loosened after assembly, and the size of the outer ring is not allowed to be more than 10.5 per cent.
The formula material meets the characteristics of good stretching, good resilience and wear resistance. The mould is also re-opened into a 45-degree split mould, so that the working surface of the dynamic seal to avoid the split mould line, wear-resistant test in a number of rubber sealing ring manufacturers stand out!

Application scenarios

Seals on solenoid valves
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Product Name: High - Performance Pneumatic Dynamic Sealing Washer (Custom NBR 70 Hardness)

Category: Pneumatic Sealing Solutions / Dynamic Sealing Components

Technical Highlights

1. Exceptional Dynamic Sealing Performance
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• 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).
2. Breakthrough Assembly Design
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• 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.
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

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)
Design Advantages
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1.Precisin Fit:

D tlerance ±0.02 mm ensures perfect mating with valve bdies.

2.Energy Efficiency:

Lw hysteresis cmpund reduces actuatin frce by 18%.

3.Crrsin Resistance:

Resists lubricants, misture, and chemical expsure.

4.Maintenance - Free:

Self - cmpensating design eliminates peridic adjustments.
Typical Applications
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Pneumatic control valves

High - cycle automation systems

Medical device actuators

Automotive air suspension systems
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.