interlocking
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I would like to ask: is the function of this solenoid valve to control the air supply applied to the shut-off valve? How do I control the cut-off valve? Why is the solenoid valve FO and the shut-off valve FC?
The spring is located at the upper part of the cylinder, while the cleaning air enters from the lower part of the cylinder; F.C. is achieved when the air supply is cut off. When the solenoid valve is not energized (i.e., powered off), FO (pay attention to the arrow on FO) causes the purge air to be discharged from the cylinder into the atmosphere; in other words, the force exerted by the cylinder spring pushes the valve toward a closed position.
One more question: is the term \"interlock released\" here different from \"interlock failure\"? I don’t understand what it means.
The description here is of very poor quality. I don’t understand a thing. In short, the opening degree of the control valve is adjusted by the positioner, while the air supply path is controlled by the solenoid valve. Extension: If it is sil2, sil3 circuits, such a configuration is not allowed.
Why didn’t you send me a WeChat message to ask me… I’m sad; I won’t tell you……
I don’t get what there is to ask about; if you can’t even understand this, then don’t work with instruments.
People who say such things don’t have very high IQ, EQ, or mental capacity. Young man, appearance is a very broad topic; everyone has a different starting point and different priorities.
Well, I don’t have much patience; I can’t even figure out how to turn on and off the valves. Is there a lower starting point than this? If they wanted to let me go, they would have done it already.
Lowering one’s standards once again. Again, the instrument range is quite wide, with different starting points and focuses.
The diagram shows a simple interlock control for a pneumatic cut-off valve. The valve is designed as FC, that is, a gas-actuated valve. This is two different concepts from the FO and FC of solenoid valves; there is no specific relationship between them. For example, in the case of a 2/3-way solenoid valve, it is sufficient to swap the outlet ports; the resulting effect will be the same. It then depends on the design requirements – the valve can be designed to operate in FO mode (open when power is lost) or FC mode (closed when power is lost). The choice should be made based on the specific operating conditions and safety requirements. In summary, the activation and deactivation of the interlock solenoid that controls the driving air source for the pneumatic valve, and the open/closed operation of the pneumatic valve itself, are different concepts.