問一下空氣穩壓器的問題

許多壓縮機例如我的California air - 440刀買的 - 都有兩個壓力表分別是儲備箱和輸出的壓力，後者可以調節。也有附加在噴槍上的。我需要25psi的輸出，無論用哪個都不行，噴槍一開壓力急劇下降，這正常嗎？

在壓縮機輸出全開-90~115psi時，我希望噴槍端的空氣穩壓器能輸出穩定的氣壓。實際感覺是穩壓器都隻是閥門。無論是壓縮機側還是噴槍側的，一開始噴壓力都下降，壓縮機啟動時壓力都增加。

公司的類似閥門應該是專業的，但是也穩定不良氣壓，我設定在60psi，時不時的壓力會變化需要重調。

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google了一下，似乎並沒有很好的空氣穩壓器。廉價的多是pinch valve加表的流量調節，負載不穩根本無法穩定壓力。

空氣穩壓器分釋放和不釋放兩類，前者就是把多餘壓力通過排氣後放掉，後者不排氣但可能限製流量來限製氣壓。也許後者能用於噴漆？

What is the difference between a relieving and a non-relieving regulator?

In this blog, Fluid Controls discusses the difference between relieving and non-relieving pressure regulators and the advantages of both options.

 

The difference between a relieving and non-relieving regulator

When the pressure in a system becomes too high, a relieving regulator stops the flow of the pressure and opens a vent, which allows the pressure to escape. The vent stays open until the levels of pressure within the system return back to normal, then the regulator resets. It allows the excess downstream pressure to be released.

Whilst a relieving regulator allows the excess pressure to escape, a non-relieving regulator restricts the flow once the pressure increases but doesn’t release it, instead trapping it. This means that another mechanism is required to relieve the pressure elsewhere.

The difference between a relieving and non-relieving regulator is extremely important when considering the application the regulator will be used for.

Relieving vs non-relieving regulator

A positive of a relieving regulator is that it not only regulates the pressure, it also lets the excess escape. Because of this function, it means that instead of adding in a relief valve to your system to do this job, the self-relieving regulator will release the pressure by itself.

A non-relieving regulator is more suited to hazardous applications because it doesn’t release the excess pressure. When it traps the extra gases or air, it ensures that flammable, expensive or dangerous gases aren’t just released into the atmosphere, their release is instead controlled.

Fluid Controls’ relieving and non-relieving regulators

When it comes to understanding relieving vs non relieving regulators, in accordance to your particular application, our team are on hand to help. An example of non-relieving would be our Porter range of regulators whilst some of our products, like the J46 Spring Loaded Regulator from Thompson Valves, come with the option of relieving or non-relieving.

For more information regarding which one of our products would be best suited to you, talk to one of our technical experts today by calling 0118 970 2060, or email us with any questions at [e-mail].

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假設在封閉的係統中，輸出壓力比輸入低了很多，例如100變成25psi。一旦噴槍開啟有了空氣出口，首先是限壓閥要開，其次是能正確檢測到壓力的變化，如果是在氣流的側麵檢測，由於真空效應可能檢測到負壓，對吧？

所有跟帖： 

• 你指哪個壓力？ -biglow- ♂ (217 bytes) () 08/07/2023 postreply 09:24:00

• 指的是噴槍所需壓力25-30psi，SP-33000噴槍標稱3-3.9CFM，空壓機7CFM@40 PSI -chinomango- ♂ (194 bytes) () 08/07/2023 postreply 10:46:47

• 就是那個regulator undersize. -biglow- ♂ (107 bytes) () 08/07/2023 postreply 12:03:09

• 更新 -chinomango- ♂ (1458 bytes) () 08/07/2023 postreply 13:49:09

• 1/4差不多，3/8好一些 -biglow- ♂ (164 bytes) () 08/08/2023 postreply 08:49:26

• 謝謝計算，3/8是沒問題，BFR2000也湊合，再低就不好-等配件 -chinomango- ♂ (0 bytes) () 08/10/2023 postreply 13:57:44