许多压缩机例如我的California air - 440刀买的 - 都有两个压力表分别是储备箱和输出的压力，后者可以调节。也有附加在喷枪上的。我需要25psi的输出，无论用哪个都不行，喷枪一开压力急剧下降，这正常吗？
在压缩机输出全开-90~115psi时，我希望喷枪端的空气稳压器能输出稳定的气压。实际感觉是稳压器都只是阀门。无论是压缩机侧还是喷枪侧的，一开始喷压力都下降，压缩机启动时压力都增加。
公司的类似阀门应该是专业的，但是也稳定不良气压，我设定在60psi，时不时的压力会变化需要重调。
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google了一下，似乎并没有很好的空气稳压器。廉价的多是pinch valve加表的流量调节，负载不稳根本无法稳定压力。
空气稳压器分释放和不释放两类，前者就是把多余压力通过排气后放掉，后者不排气但可能限制流量来限制气压。也许后者能用于喷漆？
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 fluid@fluidcontrols.co.uk.
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假设在封闭的系统中，输出压力比输入低了很多，例如100变成25psi。一旦喷枪开启有了空气出口，首先是限压阀要开，其次是能正确检测到压力的变化，如果是在气流的侧面检测，由于真空效应可能检测到负压，对吧？
