How to use air to pressurize a pressure gauge.
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Our company generally uses hydraulic pumps to conduct pressure testing on pressure gauges. This way, the oil will contaminate the pressure gauge. And it’s troublesome to operate. There’s an idea now to use gas cylinders as a pressure source, with pressure being adjusted at various stages. Install the air pipe and standard pressure gauge. Then, pressure is adjusted using devices similar to pressure regulators. Conduct stress testing in this way. . Now here’s the problem. The outlet of the gas cylinder is regulated to within 25 bar by a pressure reducing valve for the gas cylinder. The maximum inlet pressure for a regular pressure relief valve is around 10 bar. Is there anyone skilled who can help with the design? How to select a pressure relief valve. I can’t find a suitable pressure regulator now.
I’ve seen that air is used for testing safety valves under pressure.
If adjustments such as accuracy and zero point are to be made to the pressure gauge, a precise standard pressure source can be used for this purpose. But if it is just a pressure test, using clean water directly is the best and simplest option.