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80-03 type valve plate

The passivation film formed on the surface of stainless steel can resist corrosion from acids, alkalis, salts, and humid environments, extending the service life of the valve.

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  • Product Description
  • Material Advantages

    Corrosion Resistance: The passivation film formed on the surface of stainless steel resists erosion from acids, alkalis, salts, and humid environments, extending valve life.

    High/Low Temperature Resistance: Certain grades (such as 310S, 347) can operate stably within -200℃~1200℃, adapting to extreme temperature conditions.

    Strength and Toughness: Possesses both metallic strength and processing plasticity, capable of withstanding high-pressure fluid impact.

    Hygiene: Smooth surface, not prone to bacterial growth, compliant with food-grade (e.g., 304L, 316L) and medical-grade standards.

    Structure

    Slab type: Common in gate valves, opened and closed by sliding perpendicular to the fluid direction, with sealing surfaces mostly flat or wedge-shaped.

    Disc type: Common in butterfly valves, controls flow by rotating around a central axis (0°~90°), with a sealing ring (e.g., rubber, metal) on the valve plate edge.

    Swing type: Common in check valves, the valve plate swings around a fixed axis, automatically opening with fluid pressure to prevent backflow.

    Key Design Parameters

    Sealing surface form: Flat face (FF), raised face (RF), ring joint face (RJ), etc., affecting sealing performance and leakage rate.

    Flow passage diameter: Matches the valve's nominal diameter (DN), determining the fluid flow capacity.

    Actuation method: Manual, electric, pneumatic, hydraulic, etc., the valve plate structure must be adapted to different actuators (e.g., valve stem, gearbox).

    Application Scenarios

    Chemical industry: For conveying corrosive media (e.g., sulfuric acid, hydrochloric acid), 316L or duplex stainless steel valve plates are selected to prevent corrosive leakage.

    Food and pharmaceutical: Using 316L stainless steel valve plates, meeting GMP standards, for sterile fluid control (e.g., pharmaceutical equipment, beverage production lines).

    Oil and natural gas: In high-pressure, high-temperature environments, martensitic stainless steel (e.g., 420) or special stainless steel valve plates are used to withstand oil and gas erosion and sulfide corrosion.

    Water treatment and environmental protection: 304 stainless steel valve plates are used in tap water pipelines and sewage treatment equipment, resisting chloride ion corrosion.

    Energy and power: High-temperature resistant stainless steel (e.g., 321H) is used in power plant boiler valves to withstand high-temperature steam impact.

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