Selection Guide For Pneumatic Components In High-Temperature And High-Pressure Environments

In industrial production and special application scenarios, high-temperature and high-pressure environments place stringent demands on the tolerance and performance of equipment. Pneumatic components are key actuators. If they are improperly selected, they may cause system failure or even safety accidents. So, how to choose suitable pneumatic components in high-temperature and high-pressure environments?

1. Understanding the impact of high temperature and high pressure on pneumatic components

High-temperature environments may cause aging of pneumatic seals, evaporation of lubricating oil, deformation or even failure of plastic and rubber components; high pressure will increase the burden on the pneumatic system, subjecting the material to greater stress, and causing premature damage to pipes and valves. Therefore, when selecting pneumatic components, it is necessary to ensure that they have the characteristics of high-temperature and high-pressure resistance and can operate stably for a long time.

2. Material selection for pneumatic components

Metal materials: In high-temperature environments, high-temperature resistant metals such as stainless steel, aluminum alloys or nickel alloys should be given priority to avoid cracks or deformation of ordinary steel due to thermal expansion and contraction.

Sealing materials: Traditional rubber seals are prone to failure at high temperatures, so high-temperature resistant materials such as fluororubber (FKM), silicone rubber (VMQ) or polytetrafluoroethylene (PTFE) can be selected.

Lubricant: Ordinary lubricating oil may evaporate due to high temperature, so high-temperature special grease, such as molybdenum disulfide lubricant, should be selected to reduce friction and wear.

3. Selection recommendations for key pneumatic components

Cylinders

Use high-temperature alloy or ceramic coated cylinders to ensure that the cylinder wall can withstand extreme temperatures.

Choose cylinders with high-temperature sealing rings to increase service life.

If the ambient pressure is high, a high-pressure cylinder with thickened cylinder wall can be selected.

Solenoid valves

Use high-temperature resistant coils to prevent the coils from burning due to excessive temperature.

Use metal valve bodies to improve heat resistance and pressure resistance.

If the working conditions are extreme, explosion-proof solenoid valves can be selected to improve safety.

Pipes and joints

Use high-temperature resistant metal pipes, such as stainless steel pipes or nickel-based alloy pipes, to prevent plastic pipes from softening and deforming due to increased temperature.

Choose high-pressure quick-connect fittings to ensure a stable connection and prevent leakage.

4. Optimize maintenance and extend life

Check seals regularly: High temperature environments can easily accelerate the aging of seals, and they should be replaced or coated with high-temperature resistant lubricants regularly.

Avoid long-term overload operation: Even for components that are resistant to high temperature and high pressure, the intensity of use must be controlled to prevent material fatigue.

Keep the air source clean: Under high temperature and high pressure environments, impurities and moisture in the air source will aggravate the wear of pneumatic components, and high-efficiency filters should be configured.

Summary

When selecting pneumatic components under high temperature and high pressure environments, it is necessary to consider the material, structure, temperature and pressure resistance and other aspects comprehensively. Reasonable selection can not only improve the stability of the equipment, but also reduce maintenance costs and ensure the long-term operation of the system. For pneumatic systems in harsh environments, scientific selection and maintenance are equally important. Only in this way can industrial equipment remain efficient under extreme conditions.

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