Explosion-proof electromagnetic valve of Japan SMC advantages and characteristics
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1, Japan SMC explosion-proof solenoid valve has a long working life.
2, Japan SMC explosion-proof solenoid valve work standard: long-term work system, repeated short-term work system and short-term work system three. Explosion-proof solenoid valves are long-term working systems, that is, coils allow long-term power work. For long-term valve opening only short-term closure, you should use normally open solenoid valve. When used in a short-time work system and in large quantities, special orders can be made to reduce power consumption.
3, Japan SMC explosion-proof solenoid valve operating frequency: When the operating frequency is high, the structure should be a direct-acting solenoid valve, the power supply to listen to the preferred exchange. Japan SMC explosion-proof solenoid valve is to completely enclose the components of the device that can ignite the explosive gas mixture in a casing. The casing can withstand any joint or structural gap through the casing. The flammable mixture that penetrates into the casing is exploded inside without damage. It will not cause the external ignition of an explosive atmosphere formed by one or more gases or vapours. Parts that may generate sparks, arcs, and dangerous temperatures will all be placed in a flameproof enclosure. The explosion-proof enclosure will make the equipment's internal space and surroundings The environment is separated. There is a gap in the flameproof enclosure, and due to the respiration of the electrical equipment and gas permeation, an explosive gas mixture may exist inside.
Safety 1, corrosive media: should choose the plastic king electromagnetic valve and all stainless steel; for the strong corrosion of the media must use isolation diaphragm type. Example CD-F.Z3CF. Neutral medium, should also use copper alloy valve shell material for the solenoid valve, otherwise, the valve shell often rust off, especially infrequent occasions. Ammonia valves cannot use copper.
2. Explosive environment: The corresponding explosion-proof grades must be selected. Waterproof and dustproof types should be selected for open-air installation or dusty occasions.
3. The nominal pressure of the solenoid valve should exceed the maximum working pressure in the pipe.
Explosion-proof electromagnetic valve of Japan SMC Applicability 1. Medium characteristics 1.1 The quality of gas, liquid or mixed state, respectively, choose a different solenoid valve, for example, ZQDF for air, ZQDF-Y for liquid, ZQDF-2 (or -3) for Steam, otherwise it may cause malfunction. ZDF series multi-function solenoid valve can be connected to gas and liquid. It is best to state the media status at the time of subscription, and it is not necessary to install the user.
1.2 medium temperature products of different specifications, otherwise the coil will burn off, aging of the seal, seriously affecting life expectancy.
1.3 medium viscosity, usually below 50CST. If it exceeds this value, the diameter is larger than 15MM. Use ZDF series multi-function solenoid valve for special order. Path is less than 15MM set high viscosity solenoid valve.
1.4 When the cleanliness of the medium is not high, a backflushing filter valve should be installed in front of the solenoid valve. In the case of low pressure, a direct-acting diaphragm type electromagnetic valve can be used as a CD-P.
1.5 If the medium is directional and does not allow backward flow, ZDF-N and ZQDF-N are required to use two-way flow, please make special requirements.
1.6 The medium temperature should be selected within the allowed range of the solenoid valve.
2. Pipeline parameters 2.1 Select the valve port and model according to the medium flow requirements and the pipe connection method. For example, for a switch from one pipe to two pipes, select CA5 and Z3F for small paths, and select ZDF-Z1/2 for medium or large paths. Another example is to control the convergence of two pipelines, please choose ZDF-Z2/1 and so on.
2.2 According to the flow and valve KV value selected nominal diameter, but also with the pipe diameter. Please note that some manufacturers are not marked with KV value, often the size of the valve hole is smaller than the interface diameter, and must not be greedy for low prices.
2.3 Working pressure difference The minimum working pressure difference is above 0.04MPA. Indirect piloting type can be used. The minimum operating pressure difference is close to or less than zero. It must use direct acting or stepwise direct type.
3. Environmental conditions 3.1 The maximum and minimum temperature of the environment should be selected within the allowable range. If there is any excess error, special ordering is required.
3.2 High relative humidity in the environment, occasions such as water and rain, should be selected waterproof electromagnetic valve 3.3 The environment often has vibration, bumps and impact and other occasions should be selected special varieties, such as marine solenoid valve.
3.4 The use of corrosive or explosive environment should be based on the safety requirements should be selected resistance to corrosion 3.5 If the environmental space is limited, please use multi-function solenoid valve, because it eliminates the need for bypass and three manual valves and easy online maintenance .
4. Power conditions 4.1 According to the type of power supply, choose AC and DC solenoid valves. In general, AC power is easy to use.
4.2 Voltage specification Use AC220V.DC24V as much as possible.
4.3 Power Supply Voltage Fluctuation Usually, the AC is selected between +% 10% and -15%, and the DC is allowed to be ± 10% or so. If there is an excess error, it is necessary to adopt a voltage regulator or make special order requirements.
4.4 The rated current and power consumption should be selected according to the power supply capacity. It should be noted that the value of VA is higher when the AC is started, and the indirect-conducting solenoid valve should be preferred when the capacity is insufficient.
5. Control accuracy 5.1 Ordinary solenoid valve only open and close two positions, in the control of high precision and stable parameter requirements, please use multiple electromagnetic valve; Z3CF three normally open solenoid valve, with micro-open, fully open and close three Flow rate
ZDF-Z1/1 combination multi-function solenoid valve has four kinds of flow: full open, wide open, small open and full open.
5.2 Operation time: refers to the time when the electrical signal is turned on or off to the completion of the main valve action. Only the company's patented product multi-function solenoid valve can adjust the opening and closing time separately, not only meeting the control accuracy requirements, but also preventing water hammer damage.
5.3 Leakage The leakage value given on the sample is a common economic grade. If it is too high, please make a special order.
Japan SMC explosion-proof solenoid valve reliability 1, working life, this item is not included in the factory test project, is a type test project. In order to ensure the quality should be selected from the regular manufacturers of brand-name products.
2, the work system: long-term work system, repeated short-term work and short-term work of three. The company's conventional products are long-term work systems, coils allow long-term power work. For long-term valve opening only short-term closure, you should use normally open solenoid valve. When used in a short-time work system and in large quantities, special orders can be made to reduce power consumption.
3, working frequency: When the operating frequency is high, the structure should be direct-acting solenoid valve, and the power supply should listen to the preferred communication.
4. Operational Reliability This test has not been formally included in China's professional standards for solenoid valves. In order to ensure the quality of this test, it is recommended to select the brand-name products of regular manufacturers. In some cases, the number of operations is not large, but the reliability requirements are very high, such as fire protection, emergency protection, etc., must not be taken lightly. Of particular importance, it should also take two consecutive double insurance.
Japan SMC explosion-proof solenoid valve economy is one of the dimensions of its choice, but it must be on the basis of safety, application, and reliability of the economy.
Economicality is not only the selling price of a product, but also priority is given to its function and quality, as well as the cost of installation, maintenance and other accessories.
More importantly, the cost of a solenoid valve in the entire automatic control system in the entire automatic control system and even the production line is negligible. If a small amount of money is spent on mistakes, the damage group is huge.
Installation precautions are as follows:
1. When installing, note that the arrow on the valve body should be consistent with the flow direction of the medium. Do not install in places with direct dripping or splashing. The solenoid valve should be installed vertically upwards.
2. The solenoid valve should ensure normal operation within the range of 15%-10% fluctuation of the rated voltage of the power supply voltage.
3. After the solenoid valve is installed, there must be no reverse pressure difference in the pipeline. And need to be energized several times, so that it can be put into use after the temperature is appropriate.
4. Thoroughly clean the pipeline before installing the solenoid valve. The medium should be free of impurities. Install the filter before the valve.
5. When the solenoid valve is faulty or cleaned, the bypass device should be installed to ensure the system continues to operate.
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