Process Area Activity – [I See Now-33]: It operates whenever there is water present
Thread Content
In my previous post, I discussed how the steam coil also serves as a cooling coil. So, the cooling water enters from below, and a tee is used to connect it in front of the drain valve. The operating procedures state clearly: during cooling, the shut-off valve must be closed first, followed by opening the return water valve and then the inlet water valve. Yet some employees refuse to close the shut-off valves and still complain about the long cooling time. The fundamental reason for the long cooling time is that the shut-off valve was not closed, allowing some water to leak away through the steam trap. It is believed that the pressure relief valve will not activate when the pressure is low. The strainer we use is of the mechanical type from Gansu Hongfeng; it contains a float that rises whenever water enters, thereby allowing the water to be drained. Even after explaining it this way, some employees still don’t understand it; there’s no other choice but to use a spare part, open it up, add water inside, and once the ball floats, the water will flow out. Only by demonstrating this in this way can all employees truly understand. From then on, this shut-off valve never failed to close when cooled down.
You’re using the valve for testing here. . . I first saw a drain valve a few years ago, at the discharge outlet of the compressed air tank; only after doing some research did I understand how it worked.
Yes, these switches are completely normal and necessary. For coil heating, steam is introduced from above and discharged from below; during cooling, it is introduced from below and discharged from above. The post I made in the fine chemicals sector can serve three purposes. In addition to steam heating and cooling water cooling, it is also possible to achieve pump-free hot water heating for thermosensitive substances used in low-temperature reactions. It’s just about switching a few valves.