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Regulator Selection, Installation, and
Operation
減壓閥的選擇、安裝和操作
The primary function of a regulator is to reduce high-pressure gas in a cylinder or
process line to a lower, usable level as it passes from the cylinder to a piece of
equipment. A regulator is not a flow control device. It is used to control delivery
pressure only.
減壓器的主要功能是，當(dāng)鋼瓶或過(guò)程管道內(nèi)的高壓氣體從鋼瓶流向設(shè)備時(shí)，把壓力降到較低的可
用的水平。調(diào)整器不是流量控制裝置。它只能用來(lái)控制輸出壓力。
Since there are numerous hazards associated with specialty gases—hazards that
vary with the gas, the equipment used, and with the particular application—it is
necessary to take the proper precautions to assure safety in high-pressure gas
control. 
因?yàn)橥胤N氣體相聯(lián)系的危險(xiǎn)很多，而且隨氣體、使用的設(shè)備和特定的應(yīng)用而變化，有必要采取
適當(dāng)?shù)拇胧﹣?lái)確保高壓氣體控制的安全。
Before performing any operation with which you are not familiar, seek the advice of
an experienced individual. In addition to adhering to the safety and operating rules
provided here, the user should be aware of the additional safe operating practices
peculiar to each piece of equipment and each application. Consult sales office when
in doubt about correct handling procedures.
在進(jìn)行任何你不熟悉的操作之前，找有經(jīng)驗(yàn)的人咨詢一下。除了堅(jiān)持這里提供的操作規(guī)則以外，
使用者還應(yīng)該了解設(shè)備的每一部分和每個(gè)用途特有的其它安全操作慣例。當(dāng)對(duì)正確的操作程序有
疑問(wèn)是，請(qǐng)向銷售部門咨詢。
Never use any regulator for gases other than those for which it is intended.
禁止使用不是用于該氣體的任何調(diào)整器。
The following is applicable to pressure regulators used with flammable, oxidant,
corrosive, inert, or toxic gases, when it is necessary to reduce cylinder supply
pressure to a lower use pressure.
當(dāng)有必要把鋼瓶供應(yīng)壓力降到較低的使用壓力時(shí)，下文對(duì)于用于易燃、氧化劑、腐蝕性、惰性或
毒性氣體的壓力調(diào)整器是可以適用的。
How Regulators Work
減壓器怎樣工作的
Single-Stage Regulators 
單級(jí)減壓器High-pressure media enter the regulator through the inlet into the high-pressure
chamber (see Fig. 1). When the adjusting knob is turned clockwise, it compresses
the range spring and exerts a force on the diaphragm, which pushes the valve stem
open. This releases gas into the low-pressure chamber, exerting an opposing force
on the diaphragm. An equilibrium is reached when the spring force on the
diaphragm is equal to the opposing force of the gas in the low-pressure chamber.
高壓介質(zhì)通過(guò)入口進(jìn)入高壓腔（見(jiàn)圖1）。當(dāng)調(diào)節(jié)鈕順時(shí)針?lè)较蛐D(zhuǎn)時(shí)，它壓縮距離彈簧，從而
對(duì)隔膜施加了一個(gè)力，推開(kāi)了閥桿。這就把氣體放進(jìn)了低壓腔，對(duì)隔膜施加了一個(gè)反方向的力。
當(dāng)彈簧施加在隔膜上的力等于低壓腔內(nèi)氣體的反作用力時(shí)，就達(dá)到了平衡。
In a single-stage regulator, delivery pressure increases as cylinder pressure decays,
because there is less gas pressure exerted on the valve stem. Thus, frequent
adjustment of the control knob is required to maintain constant delivery pressure.
This does not pose a problem, however, with pipelines and liquefied gas products
where inlet pressure is maintained relatively constant.  
在單級(jí)減壓器里，輸出壓力隨鋼瓶壓力的減小而增大，這是因?yàn)槭┘釉陂y門系統(tǒng)上的氣體壓力減
小了。因此經(jīng)常要調(diào)整控制鈕，以維持恒定的輸出壓力。但是，對(duì)于入口壓力相對(duì)恒定的管道和
液化氣體產(chǎn)品而言，這不是一個(gè)問(wèn)題。

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