Compressed air regulating valve selection
Thread Content
Dear teachers, there is a compressed air regulating valve on site, 0.7Mpa in front of the valve, 80Kpa behind the valve, DN100 (the diameter cannot be changed), and it requires 500Nm3/h-3000Nm3/h to be adjustable. The current single-seat regulating valve does not meet the requirements. Every time the car is started, the on-site personnel need to manually open the manual valve to maintain a small flow rate. What kind of valve core should be selected?
Based on your needs, it is recommended to use pneumatic control valve core. This type of valve core can achieve precise control and adjustment of flow through air pressure adjustment, and can be automatically controlled to improve production efficiency and safety. Specific models and parameters need to be considered according to the actual situation. You can consult professional valve manufacturers or technicians to make selections based on specific parameters and process conditions. .
0.7Mpa in front of the valve, 80Kpa in the back of the valve, DN100 (the diameter cannot be changed), the requirement is 500Nm3/h-3000Nm3/h adjustable. I don’t understand: hug:
In your case, it is basically impossible to adjust a DN100 regulating valve unless you can reduce the pressure at the front of the regulating valve.
It is recommended to use "angle seat valve core" or "balanced equal valve core" for the design of the regulating valve. Angle seat valve core: The angle seat valve core is an angle-adjustable valve core that can produce high-precision flow control. The conical hole inside the valve core can adjust the flow rate. At the same time, due to the structural characteristics of the design, stable control under high pressure difference can be achieved. Balanced equal spool: The balanced equal valve core is a valve core with balanced flow characteristics, which can achieve a basic balance of flow. This kind of valve core can be suitable for precise control under high pressure difference conditions, and can achieve high precision and high stability control. In addition, it also has a self-adjusting function and does not require manual adjustment.
Calculation shows that the only way to conceal the minimum flow is to reduce the diameter. When the valve seat is reduced to dg=50, the valve opening is 40.6% at the minimum flow. When the valve seat is reduced to dg=65, the valve opening is 29.4% at the minimum flow. MCT700 Intelligent Valve Positioner