So many quick connections. It depends on your scope of application. How can I give you an answer to this question? Quick joints can be divided into: quick joints for air, quick joints for oxygen fuel gas, quick joints for gas and liquid, quick joints for oil pressure, quick joints for inert gas, quick joints for cooling water oil, quick joints for semiconductor.

1. Type and temperature of the fluid (please select the suitable type and temperature of the fluid body material and the quick joint of the sealing material). According to the fluid, the suitable body material and sealing material are different. For example, the quick connection is air. Recommend steel, water or brass or stainless steel.

2. Fluid pressure (please select the fast joint suitable for the pressure resistance of fluid pressure) fluid pressure is also the key to select the fast joint. The quick joints for oil pressure are seriated between 5.0mpa (51kgf/cm) and 68.6mpa (700kgf/cm), and the structure of the quick joints is different according to the pressure-resistant characteristics.

3, the construction of automatic switch valve (please select suitable for the use of piping valve structure quick joint) for the construction of the valve, there are two way switch type, single way switch type and two way open type. Because at the time of separation, except for the two - way switch type, there is a fluid flow from the distribution tube. So pay attention.

4. The use environment of the quick joint (please select the structure and material suitable for the use of the quick joint) shall be combined with the humidity condition, dust condition of the use environment, as well as the use environment that is prone to corrosion, to consider the type, body material and sealing material of the quick joint.

5. Shape and size of installation (please order products after determining the final shape and size) please determine the model and material of the quick connector, and specify the assembly shape and size corresponding to the characteristics of piping. Please note that dimensions are related to fluid flow.