The development of nitrogen machine equipment is getting faster and faster, so the requirements for many equipment and parts are also getting higher and higher. Below, nitrogen machine manufacturers will introduce you to what problems should be paid attention to in the selection of safety valves for nitrogen machines.

The nominal pressure of the safety valve is determined by the operating pressure, the operation temperature of the safety valve is determined by the operating temperature, the fixed pressure of the spring or lever is determined by the calculated pressure value of the nitrogen maker equipment safety valve, and then the raw materials and layout of the safety valve are determined according to the use of the medium, and the throat diameter of the safety valve is calculated according to the amount of the safety valve. The following are the usual rules for safety valve selection.

(l) Hot water boilers usually use non-closing micro-opening safety valves with wrenches.

(2) Steam boilers or steam pipelines are usually used without closing fully opened safety valves with wrenches.

(3) Water and other liquids do not compress the medium is usually used to close the micro-opening safety valve, or use the safety relief valve.

(4) High pressure water supply is usually used to close the full open safety valve, such as high pressure water heater, heat exchanger, etc.

(5) Gas and other compressible media are usually closed full-open safety valves, such as gas storage tanks, gas pipelines, etc.

(6) Class E steam boilers usually use deadweight safety valves.

(7) Large caliber, large displacement and high pressure systems usually use pulse type safety valves, such as temperature and pressure reduction equipment, power plant boilers, etc

(8) The truck tanker, train tanker, storage tank, etc., which transport liquefied gas usually uses a built-in safety valve

(9) The top of the oil tank of the nitrogen machine equipment is usually a hydraulic safety valve, which needs to be used in cooperation with the breathing valve.

(10) Pilot operated safety valves are usually used in underground drainage or natural gas pipelines, as shown in Figure 6.

(11) A safety return valve is usually used on the liquid phase return pipeline at the outlet of the tank pump of the liquefied petroleum gas station.

(12) Negative pressure or negative pressure may occur during the operation of the system is usually used vacuum negative pressure safety valve.

(13) Bellows safety valves are usually used for containers or piping systems with large back pressure fluctuations and toxic inflammable materials.

(14) The system with low freezing point of the medium of the nitrogen machine equipment usually uses the thermal insulation jacket type safety valve.

The above is a small series for you to introduce the nitrogen machine selection safety valve to pay attention to the problem. Hope to help you better buy safety valves. News content