How to choose a suitable regulator or flowmeter

Verify that the gas used is corrosive.If corrosion occurs, stainless steel expansion valves/flowmeters are recommended.

Select the air intake.

Distinguish the type of gas cylinder, and select the valve inlet according to the valve type (gas oxygen, nitrogen, argon, helium, carbon dioxide inlet G5/8, hydrogen, methane and other flammable and explosive gas W21.8 left, acetylene inlet, sulfur dioxide/ammonia G3/4, G1/2, 4L, 8L aluminum bottle W21.8 right). Cylinder valve Select range from list.

First, refer to the equipment manual to determine the working pressure.

For example, if the working pressure is 0.5MPa, it is best to choose adjustable pressure of 0-1MPa or 0-1.6 mpa as an auxiliary device (similar to choosing a high school multimeter range, where the full range of 1/3-2/3 is the working pressure). In addition, there is a bipolar reducer that provides better pressure regulation and is more expensive.