
China Manufacturing Oilfield Drilling Mud Pump Liner 3nb-1000 Bi-Metal Cylinder Liner. Extended Service Life: Normal service life exceeds 800 hours, 2-3 times longer than common liners. Bi-Metal Construction: Forged 45# steel outer sleeve combined with centrifugal cast high-chromium inner sleeve. Strict Tolerance: Inner surface is smooth mirror with strict inner hole size tolerance for precision. Wide Compatibility: Compatible with major brands: BOMCO, LANSHI, QINGZHOU, HONGHUA, DRILLMEC, etc. Certified Quality: Meets API 7K and SY5064-1985 standards for reliable oilfield performance. Customizable Options: Color, certificates, and application requirements can be customized per customer needs. Professional Support: Provides online installation guide and one-year warranty for after-sales assurance.