Issues with the instrument air duct of the shut-off valve
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This post was last edited by liu530014416 on 2020-10-5 at 22:50. The DN15 pipe is being used; since there are no suitable connectors available, it is now planned to use a pressure reducing valve with 8 mm in front and 12 mm behind it. Is this acceptable? Open the valve for gas. We supplied the 8mm tubes ourselves; the manufacturer provided connectors of 12mm size.
Looking at the picture, the connection is fine. It will not affect the valve opening and closing speed.
What is the air supply pressure? Just by looking at the pictures, the installation seems fine and it should work properly. If the pressure is extremely low, it might have a slight impact, but it shouldn’t prevent normal use
Judging from the video, this is a normal standard installation. The pressure relief valve is part of the actuator for this valve; it is supplied by the manufacturer, and everything must comply with the specifications and diameter of the pressure relief valve’s inlet.
The air source pressure needs to be sufficient for an adequate duration; what’s important during operation is that the pressure and torque inside the cylinder are sufficient. The size of the air supply pipe determines the speed at which air can be supplied. If the valve operates frequently, it is recommended to increase its size.
This two-way valve is used for isolation in processes. From 12 to 8, it might be a few seconds slower. . . As long as the process is acceptable, there should be no major problems
Perform the switch operation, calculate the switch operation time, and check the valve specifications provided by the design institute to determine whether they meet the requirements regarding the switch time.
There seems to be no problem as seen in the picture; it depends on whether turning the valves on and off has any impact.
Move the valve. As long as the switching speed meets the requirements, there’s no problem. It doesn’t seem like it will have any impact.