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Electromagnetic valve stainless steel four superior performance

Solenoid valve products have four major advantages:
I. Security:
1. Corrosive medium: The plastic king solenoid valve and all stainless steel should be used; For the strongly corrosive medium, the diaphragm type must be selected. 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: must use the appropriate explosion-proof grade products, open installation or dust more occasions should use waterproof, dustproof varieties.
3. The nominal pressure of the solenoid valve should exceed the maximum working pressure in the pipe.
II. Applicability:
1. Media characteristics
1. Electromagnetic valves of different types are selected for quality gas, liquid state or mixed state. Example ZQDF is used for air, ZQDF-Y is used for liquid, and ZQDF-2 (or -3) is used 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 seals, seriously affecting life expectancy.
1.3 Medium viscosity, usually below 50 cSt. If it exceeds this value, the diameter is larger than 15mm and ZDF series multi-function solenoid valve is used for special orders. Path is less than 15mm 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 pipes, 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, must not be coveted and the price is low.
2.3 Working pressure difference The minimum operating pressure difference is 0,04 Mpa or more. Indirect pilot type is available. The minimum operating pressure difference is close to or less than zero. It must use direct-acting or step-by-step direct type.
3, environmental conditions
3.1 The maximum and minimum temperatures of the environment shall be selected within the allowable range. If there is any excess error, special orders shall be made.
3.2 When the relative humidity in the environment is high and there is water and rain and other occasions, the waterproof solenoid valve should be selected
3.3 There are often vibrations in the environment, bumps and impacts, etc. Special varieties should be selected, such as marine solenoid valves.
3.4 Use in Corrosive or Explosive Environments
3.5 If the environmental space is limited, please use the multi-function solenoid valve, because it eliminates the bypass and three manual valves and is easy to repair online.
4, power conditions
4.1 According to the type of power supply, choose AC and DC solenoid valves respectively. In general, AC power is easy to use. 4.2 Voltage specifications Use AC220V, DC24V as much as possible.
4.3 Power Supply Voltage Fluctuation Usually, the AC selection is +10%, -15%, and DC is ±±10%. If there is an excess error, it is necessary to adopt voltage regulation measures or make special orders.
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, please use multiple position solenoid valve when the control precision is high and the parameter requirements are stable; Z3CF three normally open solenoid valve, with three kinds of flow, micro-open, full open and close; ZDF - The Z1/1 combination multi-function solenoid valve has four types of full-open, wide-open, small-open, and full-open.
5.2 operation time: refers to the electrical signal is turned on or off to the completion of the main valve action time, only the patented product multi-function solenoid valve can be adjusted on the opening and closing time, not only to meet the control accuracy requirements, but also to prevent 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.
Third, reliability:
1. Work life: This item is not included in the factory test project and it 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: a long-term work system, repeated short-term work and short-term work of three. Conventional products 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. Operating 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.
Fourth, economy:
Non-economy is one of the criteria for the selection of funds, energy, and even the waste of life. However, it must be based on safety, application, and reliability. Economics and economics are not only the selling prices of products, but also priority should be given to their function and quality. As well as the cost of installation, maintenance and other accessories, and 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 minimal. huge.
In short, economics not only refers to the price of a product, but the ratio of the price of a product to the price of a comprehensive product.

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