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ISO 15761 Gate Valve Manufacturing Process Overview
The manufacturing process of ISO 15761 gate valves involves several critical stages to ensure high performance, durability, and compliance with international standards. These valves are widely used in oil, gas, and petrochemical industries due to their robust design and reliable sealing capabilities.
1. Material Selection
The first step in the manufacturing process is selecting high-quality materials that meet ISO 15761 specifications. Common materials include carbon steel, stainless steel, and alloy steel, chosen based on the valve’s intended application and operating conditions.
2. Casting or Forging
The valve body and other major components are typically produced through casting or forging processes. Casting is used for complex shapes, while forging provides superior strength for high-pressure applications. Both methods must adhere to strict quality control measures.
3. Machining
Precision machining follows the forming process to achieve exact dimensions and smooth surfaces. CNC machines are often employed to ensure accuracy in critical areas such as the seat and stem interfaces, which are vital for proper sealing.
4. Assembly
Components are carefully assembled, including the installation of the gate, stem, seats, and sealing elements. Special attention is given to the alignment of moving parts to ensure smooth operation and prevent leakage.
5. Pressure Testing
Each valve undergoes rigorous pressure testing according to ISO 15761 requirements. This includes shell tests to check body integrity and seat tests to verify sealing performance under both high and low-pressure conditions.
6. Surface Treatment
Final surface treatments such as painting, coating, or plating are applied to protect against corrosion and enhance durability. The choice of treatment depends on the valve material and its operating environment.
7. Quality Inspection and Certification
Before shipment, each valve undergoes comprehensive quality inspections. Documentation is prepared to certify compliance with ISO 15761 standards, including material test reports and pressure test certificates.
The ISO 15761 gate valve manufacturing process combines advanced engineering with strict quality control to deliver products that meet the demanding requirements of industrial applications. By following these standardized procedures, manufacturers ensure reliable performance and long service life.