TWS340/QWS550 Stuffing Box Seal (SKU 1783082), forged from ASTM A216 WCB carbon steel with chrome plating (≥0.25mm thickness), quenched+tempered (HRC≥60), salt spray tested 1000hrs corrosion-free, API 7K compliant mud pump plunger sealing, ISO 15154-E erosion resistance, direct replacement for NOV Triplex upgrades.
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