J-VALVES Pneumatic Soft-Seal Plug Valves Made in China Vs. Trunnion Flange Ball Valves: An In-depth Comparison in Performance, Materials And Applications

1.PERFORMANCE COMPARISON:
SOFT-SEAL PLUG VALVES:

· SOFT-SEAL PLUG VALVES mainly rely on soft sealing materials  to achieve sealing. They possess good sealing performance and low opening torque, and are suitable for pipeline systems carrying water, gas and non-corrosive media.

· Their design features include low-torque operation, anti-static function and fireproof design, making them particularly suitable for occasions that require frequent opening and closing or high sealing requirements.

· Under ultra-low or high temperature conditions, their torque requirements will increase, but they can still maintain stable performance through optimized design.

TRUNNION FLANGE BALL VALVES:

· TRUNNION FLANGE BALL VALVES adopt a fixed ball design, with the ball supported by trunnion shafts, which avoids ball drift and thus improves sealing and operational reliability.

· Their sealing performance is superior to that of ordinary floating ball valves, especially excellent in high-pressure and high-temperature working conditions, and they are suitable for complex working conditions in the petroleum, natural gas, and chemical industries.

· Due to the trunnion design, their structure is more compact and the leakage risk is reduced at the same time, making them particularly suitable for application scenarios that require zero leakage.

2.MATERIAL COMPARISON:
SOFT-SEAL PLUG VALVES:

· The sealing materials are usually PTFE or nylon. These materials have good corrosion resistance and sealing properties, but poor temperature resistance, and may require additional treatment in high or low temperature environments.

· The body materials are diverse, including stainless steel, carbon steel, etc., which are selected according to specific application requirements.

TRUNNION FLANGE BALL VALVES:

· The valve seats and balls usually adopt metallic materials to ensure durability and sealing under high-pressure and high-temperature conditions.

· The trunnion parts may use special materials to extend the service life and improve the corrosion resistance.

3.APPLICATION COMPARISON:
SOFT-SEAL PLUG VALVES:

· They are mainly applied to pipeline systems carrying water, gas and non-corrosive media, especially suitable for occasions that require frequent operation.

· In industries such as petroleum, chemical, and pharmaceutical, they are widely used due to their good sealing performance and low-torque characteristics.

TRUNNION FLANGE BALL VALVES:

· They are widely used in industries such as petroleum, natural gas, chemical, and electric power, especially performing outstandingly in working conditions with high pressure, high temperature or requiring zero leakage.

· Their compact design makes them suitable for occasions with limited space, and they can withstand relatively large operating pressures and temperature changes.

4.SUMMARY:

· IN TERMS OF PERFORMANCE: SOFT-SEAL PLUG VALVES have advantages in sealing performance and operational convenience, while TRUNNION FLANGE BALL VALVES are more prominent in meeting the requirements of high pressure, high temperature and zero leakage.

· IN TERMS OF MATERIALS: SOFT-SEAL PLUG VALVES rely on soft sealing materials, while TRUNNION FLANGE BALL VALVES mainly use metallic materials. Both have their own strengths in terms of corrosion resistance and temperature resistance.

· IN TERMS OF APPLICATIONS: SOFT-SEAL PLUG VALVES are more suitable for general industrial uses, while TRUNNION FLANGE BALL VALVES are more suitable for key applications under complex working conditions.