制氮机电磁阀选择要素是什么？

电磁阀选型起首应该顺次遵照平安性，牢靠性，合用性，经济性四大准则，其次是依据六个方面的现场工况。选型根据：

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、依据管道参数选择电磁阀的：通径规格、接口方法

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

1、依照现场管道内径尺寸或流量要求来确定通径(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要选择法兰接口，≤DN50则可依据用户需求自在选择。

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

二、依据流体参数选择电磁阀的：材质、温度组

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

1、流体粘度：凡间在50cSt以下可恣意选择，若超越此值，则要选用高粘度电磁阀。

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

2、侵蚀性流体：宜选用耐侵蚀制氮机电磁阀和全不锈钢；食用超净流体：宜选用食物级不锈钢材质电磁阀。

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、流体形态：大有气态，液态或夹杂形态，特殊是口径大于DN25订货时必然要区分隔来。

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

4、高温流体：要选择采用耐高温的电工资料和密封资料制造的电磁阀，并且要选择活塞式构造类型的。

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、制氮机依据压力参数选择电磁阀的：道理和构造种类

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

1、公称压力：这个参数与其它通用阀门的寄义是一样的，是依据管道公称压力来定。

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

2、任务压力：假如任务压力低则一定选用直动或分步直动式道理；低任务压差在0.04Mpa以上时直动式、分步直动式、先导式均可选用。

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、电气选择：电压规格应尽量优先选用AC220V、DC24较为便利。

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

五、依据继续任务工夫长短来选择：常闭、常开、或可继续通电

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

1、当电磁阀需求长工夫开启，而且继续的工夫多余封闭的工夫应选用常开型。

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、如果开启的工夫短或开和关的工夫不多时，则选常闭型。

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

3、然则有些用于平安维护的工况，如炉、窑火焰监测，则不克不及选常开的，应选可长时间通电型。

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、依据情况要求选择辅佐功用：防爆、止回、手动、防水雾、水淋、潜水.

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