制氮機電磁閥選擇要素是什么？

電磁閥選型起首應該順次遵照平安性，牢靠性，合用性，經(jīng)濟性四大準則，其次是依據六個(gè)方面的現場(chǎng)工況。選型根據：

The selection of solenoid valve should first follow the four principles of safety, reliability, applicability and economy, followed by six aspects of field conditions. Selection basis:

一、依據管道參數選擇電磁閥的：通徑規格、接口方法

1、 Selection of solenoid valve according to pipeline parameters: diameter specification and interface method

1、依照現場(chǎng)管道內徑尺寸或流量要求來(lái)確定通徑(DN)尺寸。

1. The diameter (DN) shall be determined according to the internal diameter or flow requirement of the pipeline on site.

2、接口方法，普通>DN50要選擇法蘭接口，≤DN50則可依據用戶(hù)需求自在選擇。

2. The interface method, common > DN50 to choose flange interface, ≤ DN50 can be freely selected according to user needs.

二、依據流體參數選擇電磁閥的：材質(zhì)、溫度組

2、 Select the material and temperature group of solenoid valve according to fluid parameters

1、流體粘度：凡間在50cSt以下可恣意選擇，若超越此值，則要選用高粘度電磁閥。

1. Fluid viscosity: generally below 50cst can be arbitrarily selected, if beyond this value, then choose high viscosity solenoid valve.

2、侵蝕性流體：宜選用耐侵蝕制氮機電磁閥和全不銹鋼；食用超凈流體：宜選用食物級不銹鋼材質(zhì)電磁閥。

2. Corrosive fluid: corrosion resistant solenoid valve and stainless steel should be selected; Edible super clean fluid: stainless steel solenoid valve of food grade should be selected.

3、流體形態(tài)：大至有氣態(tài)，液態(tài)或夾雜形態(tài)，特殊是口徑大于DN25訂貨時(shí)必然要區分隔來(lái)。

3. Fluid form: gas, liquid or inclusion form, especially when the diameter is larger than DN25, it must be separated when ordering.

4、高溫流體：要選擇采用耐高溫的電工資料和密封資料制造的電磁閥，并且要選擇活塞式構造類(lèi)型的。

4. High temperature fluid: to choose the use of high temperature electrical information and sealing information manufacturing solenoid valve, and to choose the piston type structure type.

三、制氮機依據壓力參數選擇電磁閥的：道理和構造種類(lèi)

3、 Principle and structure of selecting solenoid valve according to pressure parameters of nitrogen generator

1、公稱(chēng)壓力：這個(gè)參數與其它通用閥門(mén)的寄義是一樣的，是依據管道公稱(chēng)壓力來(lái)定。

1. Nominal pressure: this parameter and other general valve meaning is the same, is based on the pipeline nominal pressure.

2、任務(wù)壓力：假如任務(wù)壓力低則一定選用直動(dòng)或分步直動(dòng)式道理；低任務(wù)壓差在0.04Mpa以上時(shí)直動(dòng)式、分步直動(dòng)式、先導式均可選用。

2. Task pressure: if the task pressure is low, you must choose direct action or step-by-step direct action; When the pressure difference of low task is above 0.04MPa, direct acting, step-by-step direct acting and pilot operated can be selected.

四、電氣選擇：電壓規格應盡量?jì)?yōu)先選用AC220V、DC24較為便利。

4、 Electrical selection: the voltage specification should give priority to AC220V and DC24, which is more convenient.

五、依據繼續任務(wù)工夫長(cháng)短來(lái)選擇：常閉、常開(kāi)、或可繼續通電

5、 According to the duration of the task to continue to choose: normally closed, normally open, or can continue to power

1、當電磁閥需求長(cháng)工夫開(kāi)啟，而且繼續的工夫多余封閉的工夫應選用常開(kāi)型。

1. When the solenoid valve needs to be opened for a long time, and the continuous time is more than the closed time, the normally open type should be selected.

2、如果開(kāi)啟的工夫短或開(kāi)和關(guān)的工夫不多時(shí)，則選常閉型。

2. If the opening time is short or the opening and closing time is not long, select the normally closed type.

3、然則有些用于平安維護的工況，如爐、窯火焰監測，則不克不及選常開(kāi)的，應選可長(cháng)時(shí)間通電型。

3. However, some working conditions used for safe maintenance, such as furnace and kiln flame monitoring, can not be selected normally open, should choose long-time power on type.

六、依據情況要求選擇輔佐功用：防爆、止回、手動(dòng)、防水霧、水淋、潛水.

6、 According to the requirements of the situation, choose auxiliary functions: explosion proof, check, manual, waterproof fog, water spray, diving