Abrasive Resistant Blue Valve Insert (SKU: KM-101B) ASTM D2000-22 Class 3 NBR+PTFE composite (hardness ≥90 Shore A) with vulcanized bonding process (160℃×30min), operates at -30°C~120°C. Compatible with API 7K mud pump valve assemblies, salt spray tested >1000h corrosion-free. Friction coefficient ≤0.12, dynamic leakage rate ≤0.03mL/min.
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