303122 Discharge Valve Assembly; AR, M14 (SKU 303122), forged from 20CrMnTi alloy steel with carburizing treatment (surface hardness ≥HRC60), polyurethane sealing ring for API 7K mud pumps (F500/F1300), impact resistance increased by 50%, working pressure ≥31MPa, compliant with API 7K fluid end module standards.
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