原文：
          上海阀门厂介绍电磁阀在选型时的注意事项

        一：适用性 管路中的流体必须和选用的电磁阀系列型号中标定的介质一致。 流体的温度必须小于选用电磁阀的标定温度。 电磁阀允许液体粘度一般在20CST以下，过滤器大于20CST应注明。 工作压差，管路最高压差在小于0.04MPa时应选用如ZS,2W,ZQDF,ZCM系列等直动式和分步直动式；最低工作压差大于0.04MPa时可选用先导式（压差式）电磁阀；最高工作压差应小于电磁阀的最大标定压力；一般电磁阀都是单向工作，鸭嘴阀因此要注意是否有反压差，如有安装止回阀。 流体清洁度不高时应在电磁阀前安装鸿丰阀门厂过滤器，一般电磁阀对介质要求清洁度要好。 注意流量孔径和接管口径；电磁阀一般只有开关两位控制；低温阀门条件允许请安装旁路管，便于维修；有水锤现象时要定制电磁阀的开闭时间调节。 注意环境温度对电磁阀的影响 电源电流和消耗功率应根据输出容量选取，电源电压一般允许±10%左右，必须注意交流起动时VA值较高。

       二、可靠性 电磁阀分为常闭和常开二种；一般选用常闭型，水力控制阀通电打开，断电关闭；但在开启时间很长关闭时很短时要选用常开型了。 动作时间很短频率较高时一般选取直动式，大口径选用快速系列。 三、安全性 一般电磁阀不防水，在条件不允许时请选用防水型，工厂可以定做。 电磁阀的最高标定公称压力一定要超过管路内的最高压力，排气阀、排泥阀否则使用寿命会缩短或产生其它意外情况。 有腐蚀性液体的应选用全不锈钢型，强腐蚀性流体宜选用塑料王（SLF）电磁阀。 爆炸性环境必须选用相应的防爆产品。 四、经济性 有很多电磁阀可以通用，但在能满足以上三点的基础上应选用最经济的产品。温馨推荐使用上海著名品牌鸿丰阀门电磁阀。

“ Shanghai Valve Factory introduces solenoid valve in the selection Precautions ”,是由中国电磁阀网提供的国际阀门新闻，译文仅供参考。另外，中国电磁阀网还提供相关产品搜索： 煤气电磁阀、 零压启动电磁阀、 微型电磁阀、 高压电磁阀、 真空电磁阀等。

译文：
       Shanghai Valve Factory introduces solenoid valve in the selection Precautions 1: Applicability Fluid pipe valve must be selected in the calibration of medium range model consensus. Fluid temperature must be less than the calibration temperature selection valve. Solenoid valve to allow liquid viscosity Forged Steel Valves generally 20CST less than 20CST should be marked. Working pressure, maximum pressure pipeline should be used in less than 0.04MPa as ZS, 2W, ZQDF, ZCM series and direct-action direct-action step; minimum working pressure greater than 0.04MPa may use Pilot (Pressure Differential) electromagnetic valve; maximum working pressure should be less than the maximum calibration pressure solenoid valve; generally one-way valve is working, so pay attention to whether there is anti-pressure, if installed check valve. Fluid cleanliness is not high when theHydraulic control valves solenoid valve before the valve factory installed filter Hung Fung, general cleanliness requirements solenoid valve on the media better. Note flow aperture and take over the aperture; solenoid valve generally only two control switches; conditions allow, install bypass pipes, easy maintenance; a water hammer phenomenon to Cast Steel customize the opening and closing time of valve adjustment. Pay attention to environmental impact of temperature on the electromagnetic valve Supply current and power consumption should be selected according to the output capacity of the power supply voltage ± 10% around the general permit, must pay attention to when starting the exchange value of the higher VA. Second, reliability Solenoid valve normally closed and normally open divided into two; generally used in the normally closed, power open, power off; but in a very long time to open a very short time to Water Control valves close the normally open type of use. Action is very short at high frequencies are usually selected straight acting, rapid series of large-caliber selection. Third, security General solenoid valve is not waterproof, when the conditions are not allowed to use water when you type, the factory can be customized. The maximum calibration nominal pressure solenoid valve must be more than the maximum pressure within the pipe, otherwise life will be shortened or produce other surprises. Corrosive liquids should be used all stainless steel type, strong corrosive fluids should use plastic Wang (SLF) solenoid Other pumpsvalve. Explosive environment must use the appropriate explosion-proof products. Fourth, economy There are many solenoid valve can be generic, but the basis to meet the above three points should choose the most economical products. Warm recommended Shanghai famous brand Hilltop valve solenoid valve.

原文来源：http://www.diancifa.com/

2010-09-02 02:19

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