throttling orifice plate

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As a throttling element, the flow-limiting orifice plate offers advantages such as simple structure, ease of processing, low manufacturing costs, and convenient installation. Where process requirements are met, using such orifice plates instead of control valves to regulate flow or reduce pressure can significantly cut down on investment and operational maintenance costs. As a result, it is widely used in industrial installations abroad, playing an important role in ensuring the safe operation of these systems. Principle of flow control orifice plate: The flow control orifice plate is used to limit the flow rate of a fluid or reduce its pressure. A pressure drop occurs as fluid passes through the orifice plate, and the flow rate through the orifice plate increases as this pressure drop increases. However, when the pressure drop exceeds a certain value, that is, beyond the critical pressure drop, regardless of how much the outlet pressure decreases, the flow rate will remain at a constant level and will not increase any further. A flow control orifice plate is used based on this principle to limit the flow rate of a fluid or reduce its pressure. Classification of flow restriction orifice plates: Flow restriction orifice plates are classified into single-orifice plates and multi-orifice plates based on the number of openings on the plate ； Based on the number of orifice plates, they can be divided into single-stage and multi-stage types. Material of the flow control orifice plate: Standard materials include 316 stainless steel, 304 stainless steel, 310 stainless steel, Hastelloy C276, Hastelloy B3, duplex stainless steel, super duplex stainless steel, Monel 400, carbon steel, titanium, nickel 600, tantalum, PTFE, and PVDF, among others. Other special materials can be customized. Functions of the flow control orifice plate: 1. In situations where the pressure of the process material needs to be reduced ； 2. When a significant pressure drop is required upstream and downstream of a valve in a pipeline, in order to reduce the erosion of the valve by the fluid, an orifice plate can be connected in series upstream of the valve, provided that throttling through the orifice plate does not result in the formation of a gas phase ； 3. Places where the fluid needs to flow in small quantities and continuously, such as the flushing pipes of pumps, the bypass pipes of hot standby pumps (low-flow protection pipes), analysis sampling pipes, etc ； 4. Areas where pressure reduction is needed to reduce noise or wear, such as vent systems.