Knowledge

Do you know the principle of selection of Cryogenic Globe Valve?/



Selection principle:

      1. Shut-off valves should be used on high-temperature, high-pressure medium pipelines or devices. Such as thermal power plants, nuclear power plants, petrochemical systems on the high temperature, high pressure pipeline.

      2. Convection resistance on the pipeline is not strict on the pipeline. That is, places with little consideration for pressure loss.

      3, small valve can choose needle valve, instrument valve, sampling valve, pressure gauge valve and so on.

      4, there is flow regulation or pressure regulation, but the adjustment accuracy is not high, and the pipe diameter is relatively small, such as nominal pass through ≤ 50mm on the pipeline should be used.

      5. For small chemical fertilizers and large chemical fertilizers used in synthetic industrial production, high-pressure angle type globe valves or high-pressure angle type throttle valves with nominal pressure PN160 nominal pressure 16MPa or PN320 nominal pressure 32MPa should be used.

      6. Alumina Bayer process in the desiliconization workshop, easy to coke the pipeline, easy to use valve body type, valve seat can be located, hard alloy sealing vice DC type stop valve or DC type throttle valve.

      7. For the water supply and heating projects in urban construction, nominal pipes passing through the smaller ones can be used with cut-off, counterbalance valves or plunger valves, such as pipes with a nominal pressure of less than 150mm. The most obvious advantages are: During the opening and closing process, the friction between the valve flap and the sealing surface of the valve body is smaller than that of the gate valve, so that it is wear-resistant. The opening height is generally only 1/4 of the diameter of the seat channel and is therefore much smaller than the gate valve. Usually there is only one sealing surface on the valve body and the valve flap, so the manufacturing process is better and it is easy to maintain. Nominal pressure or pressure level: PN1.0-16.0MPa, ANSI CLASS 150-900, JIS10-20K Nominal diameter or diameter: DN10 ~ 500, NPS 1/2 ~ 36" Connection: flange, butt weld, thread, etc. Applicable temperature: -196 °C ~ 700 °C Drive: Manual, bevel gear transmission, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304L ), CF8M (316), CF3M (316L), Ti. The use of different materials, can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.