What does the valve type DN50 mean? There is an arrow on the valve body. It says "25" and "25" in the direction. What does it mean? If it's 15, what does it mean?
The internal diameter of DN50 is 60mm, and 50 is the nominal diameter of the valve.25 is the nominal pressure refers to 2.5MPa, as well as 1.6MPa, 1.0MPa
DN50 type nominal diameter, that is, the diameter and diameter of the average country unit mm 25 for PN, conversion unit for 2.5Mpa, only 254060, no 15
DN50 is the nominal diameter of the valve, the direction arrow on the body as the flow direction of the liquid in the valve body, the arrow above written 25 refers to the valve working pressure is 25MPa, if it is 15 that the valve working pressure is 15MPa.
