The two are used in different occasions. The hydraulic connector is suitable for high-pressure occasions, while the pneumatic connector is suitable for low-pressure occasions.
Most of the pneumatic and g-thread connections are very different. The threads of hydraulic joints are widely used, including metric thread, British thread, American thread and so on.
There are also differences in material between the two. Many pneumatic joints use plastic, and most hydraulic joints use carbon steel or stainless steel. Moreover, the thickness and quality requirements of pneumatic joints are not as high as those of hydraulic joints.
There is also a big difference in the price between the two. The hydraulic connector is much more expensive than the pneumatic connector.
液压管接头的耐压很高，常用的有16MPa, 25MPa, 35MPa几个级别。而气动管路的压力一般是0.8MPa。
The pressure resistance of hydraulic pipe joints is very high. The commonly used ones are 16MPa, 25MPa and 35MPa. The pressure of pneumatic pipeline is generally 0.8MPa.
Paiyuewei company is engaged in professional R & D and production of various hydraulic transition joints, rubber hose joints, steel pipe assemblies, oil pipe assemblies, quick joints, high-pressure ball valves, pipe clamps, flanges, stainless steel ferrule joints, welded joints, imitation American ball valves and precision seamless steel pipes.