Pressure rating issues in the selection of electric on-off valves
Thread Content
Dear experts: For ethanol with a medium pressure of 0.2 MPa, and since there is no gas source, an electric on-off valve should be used – should the pressure rating be PN16 or PN25? Clause 10.3.2.3 of the \"Specifications for the Selection and Design of Automation Instruments in Petrochemical Industries\" (SH/T 3005-2016) stipulates that: \"The design and manufacture of valve bodies shall comply with ASME B16.34 standards or equivalent Chinese standards. The pressure class of the valve bodies shall not be lower than PN20 (ASME CL150). The design pressure, design temperature, material, and corrosion resistance of the valve bodies and their accessories shall not be inferior to those specified for the piping materials. All pressure-bearing components shall meet the requirements of the pipeline design conditions.\" ”Can I choose PN16?
PN16 is more than sufficient. We also manufacture electric on-off valves. If rapid shutdown is required, our electric on-off valves can achieve an operation time of less than 5 seconds. They are designed specifically for situations where there is no gas supply available to use pneumatic valves, yet rapid opening and closing are necessary. Those who are interested can contact me at 844151308@qq.com
It is recommended that the minimum requirements be met between the two; that is, when the pipeline pressure rating is below PN20, the valve body should meet PN20 standards, and when the pipeline pressure rating is above PN20, the valve body should meet a standard that is not lower than that of the pipeline.