Are the tolerance numbers for pneumatic valve metal fittings small?

Yes, pneumatic valve metal fittings usually have smaller tolerance values. This is because the connections and seals in pneumatic systems require high precision to ensure the reliability and performance of the system. A smaller tolerance helps:
Ensure sealing: Accurate tolerances ensure tight connections between various components, prevent gas leakage, and maintain system pressure and efficiency.
Improving performance: Precisely manufactured accessories can reduce friction and wear, extend the service life of the system, and ensure stable operation under both high and low pressure conditions.
Compatibility and Interchangeability: Smaller tolerances help ensure interchangeability between accessories produced by different manufacturers, which is crucial for maintaining and replacing components.
Specific tolerance requirements:
The tolerance requirements for metal fittings of different types of pneumatic valves may vary, depending on the type of fittings, materials used, and application requirements. The following are some common tolerance requirements:
Screw fittings: The tolerances of threaded fittings are usually in accordance with international standards (such as ISO Manufacturing according to DIN, ANSI, etc. to ensure accuracy and compatibility of threads. For example, The tolerance requirements for NPT threads are very strict to ensure sealing performance under high pressure.
Pipe joints: The tolerance of pipe joints is usually at the micrometer level to ensure a tight fit with pipes or hoses. The smaller the tolerance, the tighter the fit, and the lower the risk of air leakage.
Quick connectors and sleeve connectors: These connectors typically require extremely high manufacturing accuracy to ensure reliability and sealing during connection and disconnection.
Quality control:
In order to ensure that the tolerance is within the specified range, strict quality control will be carried out during the manufacturing process of metal fittings for pneumatic valves, including:
Precision machining: Manufacturing using CNC machines and other precision machining equipment.
Inspection and testing: Conduct inspections using high-precision measuring instruments (such as coordinate measuring machines) to ensure that the dimensions and tolerances of the accessories meet the design requirements.
Material selection: Choose high-quality materials to ensure machining accuracy and finished product quality.
Conclusion:
The tolerance values of metal fittings for pneumatic valves are usually small to ensure the sealing, performance, and compatibility of the system. These precise tolerance requirements are achieved through strict manufacturing and quality control processes, ensuring the reliability and efficiency of pneumatic systems under various working conditions.