Views: 0 Author: J-VALVES Publish Time: 2024-12-26 Origin: Site
Material selection is the first and most critical step in manufacturing B62 bronze ball valves. The primary material used is C83600 tin bronze, known for its high tensile strength, excellent corrosion resistance, and good machinability.
• Chemical Composition: C83600 bronze typically contains 83–87% copper, 3.5–5.5% tin, and small amounts of zinc and lead. This composition ensures the material's robustness and durability.
• Material Testing: Raw materials must undergo rigorous testing to verify their chemical composition and mechanical properties. Tests include tensile strength, elongation, and hardness tests to ensure compliance with ASTM B62 standards.
The casting process is crucial for forming the main components of the ball valve, including the valve body, ball, and other critical parts.
• Mold Preparation: High-precision molds are prepared to ensure the accuracy of the cast components. These molds are designed to accommodate the specific dimensions and tolerances required for the valve.
• Melting and Pouring: The bronze alloy is melted in a high-temperature furnace. The molten metal is then poured into the prepared molds. Careful control of the pouring temperature and speed is essential to avoid defects such as porosity and inclusions.
• Cooling and Solidification: After pouring, the molds are allowed to cool slowly to ensure uniform solidification. Once the metal has solidified, the cast components are removed from the molds.
Assembly involves carefully fitting together the various components to form a functional ball valve.
• Seal Installation: High-quality seals, such as PTFE or other suitable materials, are installed to ensure leak-tight performance. The seals are carefully positioned to provide optimal sealing between the ball and the valve body.
• Valve Stem and Handle: The valve stem is assembled with the ball, and a handle or actuator is attached to allow for manual or automated operation.
• Final Assembly: All components are assembled, and the valve is checked for proper alignment and operation.
4. Quality Control and Testing
Quality control and testing are essential to ensure the valve meets the required performance standards.
• Dimensional Inspection: All machined components are inspected to verify they meet the specified dimensions and tolerances.
• Pressure Testing: The assembled valve undergoes pressure testing to ensure it can withstand the rated working pressure without leakage. This typically involves subjecting the valve to a pressure higher than its maximum allowable working pressure (MAWP).
• Seal Testing: The valve is tested for seal integrity to ensure there are no leaks. This may involve both hydraulic and pneumatic tests.
• Operational Testing: The valve is operated multiple times to ensure smooth and reliable operation. This includes checking for any binding or excessive torque during opening and closing.
