Function of self-acting pressure control valve + throttle orifice plate
Thread Content
In the lubricating oil system: what is the function of the self-acting pressure control valve + throttle orifice plate?
Control valves can be used to regulate pressure, so why is a orifice plate connected in parallel? It is to allow the orifice plate to handle a certain flow rate, thereby reducing the size of the control valve. Reduce costs?
Here’s a suggestion: the first step in taking on a production role is to understand the principles behind the entire production process. Only after that can one start to consider those things that may seem unrelated. These things fall within the domain of designers; as something related to operation or technical management, it is necessary to make good use of them. If it’s really achieved, I think you’ll understand why. Please forgive me for being blunt :)
I’m not in production; I’m a designer who doesn’t understand this. :Q
The flow-limiting orifice ensures that a minimum flow rate is always maintained, with the remaining amount supplied by the self-regulating valve.
That makes sense, but I see in some calculation sheets that there is a ratio between the control valve and the orifice plate; it seems that the flow rate through the orifice plate is a bit higher.
I work in operations; I speculate that if a control valve fails and flow can still be maintained, the pumps will definitely start automatically in dual-pump mode. If the heat exchanger becomes blocked, the flow rate can be adjusted through the control valve. In short, the unit must not be damaged due to a lack of lubricant. Adding a flow restriction orifice plate can indeed reduce the cost of the control valve.
1. Self-acting pressure control valve, used to regulate the lubricating oil pressure. 2. Flow-limiting orifice plate – even if the control valve fails and closes, lubricating oil can still flow through this orifice plate, ensuring that the bearing supply of oil is not interrupted.
If I were to design it, I would add gate valves before and after the self-acting control valve, with a drain in between. The orifice plate was replaced with a stop valve. Add an on-site pressure gauge to the pipeline at the back. :lol