Core Machined Components	Materials	Key Machining Parameters	Application Value
Valve Stem / Valve Core	Stainless Steel 316L / Titanium Alloy TC4 / High-Temperature Alloy	Dimensional Tolerance ±0.002 mm Surface Roughness Ra 0.05 μm Cylindricity ≤0.001 mm	Ensures tight sealing during valve opening and closing, withstands high pressure and corrosion, and achieves zero leakage
Valve Seat Sealing Surface	Hard Alloy Surfacing / Ceramic Coating Substrate	Flatness ≤0.0015 mm Sealing Surface Roughness Ra 0.02 μm	Improves wear resistance, adapts to high-frequency opening and closing conditions, and extends valve service life
Valve Disc / Valve Plate	Ductile Iron / Aluminum Alloy 6061	Geometric Tolerance ≤0.003 mm Flow Channel Surface Accuracy ±0.005 mm	Optimizes fluid passing efficiency, reduces pressure loss, and enables precise regulation
Actuator Connecting Shaft	40Cr Quenched and Tempered Steel	Keyway Symmetry ≤0.002 mm Thread Tolerance 5H/5g	Ensures smooth linkage with actuators and accurate torque transmission without deviation

Machining Process and Quality Inspection Standards

Process Solution: Adopt 5-axis CNC simultaneous machining to achieve one-time forming of complex curved surfaces; key sealing surfaces are processed by CNC grinding + polishing for stable and controllable precision.

Quality Inspection Requirements: 100% inspection of key dimensions with Coordinate Measuring Machine (CMM); pressure test for sealing performance (pressure resistance ≥10MPa); defect rate controlled below 0.3%.

Working Condition Adaptability: Machined parts can withstand high and low temperature environments ranging from -40℃ to +500℃, suitable for harsh scenarios such as chemical industry, petroleum, and aerospace.

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