CAT 396-1568 BEARING-SLV-GD

CAT 396-1568 GD is a cast iron exhaust elbow assembly for Caterpillar engine exhaust systems. It connects the turbocharger to the main exhaust pipe, optimizing exhaust flow direction and reducing back pressure. It is compatible with various medium and heavy-duty engines. The following is information on its structured technology and applications.

Core Technical Parameters

Item Details
Basic Attributes Model 396-1568 GD, Material: High-silicon molybdenum heat-resistant cast iron (ASTM A48 Class 35), integral casting + high-temperature coating, single weight approximately 12.5 kg, operating temperature -40℃ to +850℃, pressure resistance ≥0.8 MPa, applicable medium: engine exhaust gas (containing corrosive components such as SO₂ and NOₓ), coating temperature resistance ≥1000℃, thermal shock resistance ≥50 cycles (20℃→800℃→20℃)

Key Dimensions Inlet flange inner diameter 114 mm (with 10.9 grade bolts, 18 mm hole diameter, quantity 8), outlet outer diameter 133 mm (wall thickness 6 mm), bending angle 90°, flange sealing surface roughness Ra≤1.6 μm, flange flatness ≤0.15 mm, total length 420 mm, installation center distance 320 mm, flange thickness 28 mm, elbow curvature radius 150 mm, coaxiality ≤0.2 mm
Compatible Models and Locations: Compatible with Cat C13/C15/C18 engines, 349D2/352 excavators, 982M loaders, 140M graders. Installed at the turbocharger outlet, one unit per engine. Suitable for operating speeds ≤2200 rpm.

Performance Parameters: Airflow drag coefficient ≤0.3, back pressure reduction rate ≥8%, coefficient of thermal expansion 11.2×10⁻⁶/℃, tensile strength ≥350 MPa, yield strength ≥220 MPa, elongation ≥5%. Recommended installation torque: flange bolts 85-95 N・m, gasket compression 0.8-1.2 mm.

Structural and Performance Advantages: Heat-resistant cast iron material: high silicon molybdenum content, resistant to high-temperature oxidation and thermal fatigue, suitable for long-term operation. No deformation or cracking at 850℃, suitable for high-temperature Cat® Parts applications at turbocharger outlets.

Optimized flow path design: The 90° curved flow path, simulated by CFD, reduces airflow impact losses, lowers exhaust back pressure, improves engine power and fuel efficiency, and suppresses exhaust noise transmission.

Flange sealing structure: Paired metal-graphite gaskets with an anti-stick coating on the sealing surface prevent seal failure at high temperatures, suitable for frequent start-stop and thermal cycling conditions, with a seal life ≥6000 hours.

Integral casting process: No welded structure, reducing thermal stress concentration points, excellent thermal shock resistance, suitable for drastic temperature changes from engine cold start to full load to shutdown.