How are the inner diameter of the pipe for this control butterfly valve and the dimensions of the valve body determined?
Thread Content
Xiaobai, I have a question: for this control butterfly valve in the data sheet, the pipe size is 28\" x 7.92 mm, while the valve body and valve disc are both 24\" in size. Was this valve body manufactured based on a 24-inch standard or a 28-inch standard? I really can’t figure it out! Urgently needed
The control butterfly valve is 24 inches. According to row 26 of the data sheet (valve body size), it is 24 inches. The reducer fits with 28-inch pipes.
Since the pipe diameter is 28 inches and the valve is 24 inches, a reducer (also known as a transition fitting) is needed for conversion. These reducer pipes can be purchased from the manufacturers that supply pipes; the manufacturer should provide 24-inch ANSI ASME B16.25 pipes with a pressure rating of 150 pounds, along with flanges for butt welding, so as to match the valve flanges.
Item 28 in the data table “Valve Body and Valve Core” indicates that the connection size is 24 inches; therefore, the flange on the valve body must be 24 inches in size. To connect it to a main pipe with a diameter of 28 inches, a reducer, also known as an elbow, is required
A look at the piping regulations for control valves issued by the Petrochemical Design Institute shows that the same requirement applies, with all 11 types of piping following this rule. Let’s pick 2 to take a look at. You can also check the single-line diagram or PID diagram, which show the reducers (changes in diameter).