safety Industrial Valves selection principle: 1. Corrosive medium: plastic oversize solenoid valve, stainless steel material; Corrosive medium using isolation diaphragm type. In a neutral medium, also should choose the copper alloy shell material of solenoid valve. Otherwise, the rust debris often fell off the valve shell, especially when the action is not frequent. Ammonia valve can not made of copper. 2. Explosive environment: must choose explosion-proof products. Outdoor installation or dust should choose waterproof and dustproof products. 3. Nominal pressure solenoid Industrial Valves should exceed the maximum working pressure in the pipeline. Applicability: 1. Dielectric properties 1) Gas, liquid or mixed state to choose different types of electromagnetic valve. 2) Medium temperature specifications of different products, otherwise the coil burn out, seal aging, seriously affect the service life; 3) Medium viscosity, general under 50 CST. If more than 15 mm in diameter, using the multi-function solenoid valve; When the diameter of less than 15 mm, the use of high viscosity electromagnetic valve. 4) When the cleanliness of the medium is not high, the filter backwash valve should be installed in front of the solenoid valve. When the pressure is low, can choose directly diaphragm solenoid valve. 5) If the medium is directional circulation, do not allow the backflow, requires two-way cycle. 6) Medium temperature should be in the range of allowable electromagnetic valve. Dalian Industrial Valves pipe parameters (2) According to the flow and Kv value selection of valve nominal diameter, also can choose the same as the pipe inside diameter of pipe. 3) Working pressure difference: minimum working pressure difference at 0. More than 4 mpa, can choose indirect guiding type; Minimum working pressure difference is close to or less than zero, you must select direct or direct type step by step. 3. Environmental conditions 1) The maximum and minimum temperature environment should be within the scope of the permit. 2) On the occasion of relative humidity, rain, should choose waterproof solenoid valve. 3) For the environment vibration, turbulence, shock, etc. , should choose Marine electromagnetic valve and other special type. 4) In corrosive or explosive environment, according to the requirements of safety priority corrosion type selection. 5) If the environment space is limited, should choose multi-function solenoid valve, because it saves the bypass and three manual valve, facilitate online maintenance.

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