I would like to ask how to interpret the nameplate of this safety valve?
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Can the operating pressure of a safety valve be understood as the operating pressure of the container? How can the nominal pressure be calculated in the absence of relevant data? Can the setting pressure be considered as the release pressure?
1. Can the operating pressure of a safety valve be considered to be the operating pressure of the container? No; there are various types of operating pressures for safety valves, and the set pressure is higher than the operating pressure of the container.
2. How can the nominal pressure be calculated in the absence of relevant data? It is determined based on the operating conditions of the container, including the discharge pressure and operating temperature.
3. Can the set pressure be considered to be the release pressure? The set pressure is not equal to the release pressure.
2. How can the nominal pressure be calculated in the absence of relevant data? It is determined based on the operating conditions of the container, including the discharge pressure and operating temperature.
3. Can the set pressure be considered to be the release pressure? The set pressure is not equal to the release pressure.
How can I find out the operating pressure of that safety valve? The available documents don’t specify the nominal pressure, and the label on the device at the site is unreadable: Q
Set pressure: 0.80 MPa; opening/closing pressure difference: 0.05 MPa; test pressure difference: 0.90 MPa (inlet/outlet pressure difference: 0.10 MPa); common reference
This is a safety pressure relief valve, not a safety valve; it releases pressure at 0.8 MPa and returns to its original position at 0.05 MPa
The safety valves of Anderson Greenwood Crosby are really awesome
This post was last edited by hjame on 2019-9-3 21:28. The parameters corresponding to the markings on the label are very detailed and need to be looked up in the relevant technical manuals. 3L4 JBS-E15SJ-SPL 3 ---Import nominal pressure: 150LB, diameter: 3" (DN80). L ---L orifices (throat diameter denoted by L; specifications are provided in API STD 526). 4 ---Export nominal pressure: 150LB, diameter: 4" (DN100). J ---J-SERIES. B ---Bellows (bellows-type balance). 1 ---150LBx150LB (nominal pressures for inlet and outlet flanges). 5 ----20 to 650°F (-29 to 343°C). S ---SST body and bonnet/316 SS trim/316 spring. J ---(Standard) threaded cap. SPL---Non-standard option or configuration; no specific standard requirements or regulations apply