Solenoid valve four performance description

First, the economics of the solenoid valve:

The economy is one of the measures for capital, energy and life. Of course, the premise is that the economy and economy based on safety, application and reliability are not only the selling price of the products, but also the function and quality of the products. Installation and repair and other

The cost of the accessories and, more importantly, the cost of a solenoid valve in the entire automatic control system in the entire automatic control system and even in the production line is negligible. If the image is small and cheap, it is huge to make a mistake.

Second, the safety of the solenoid valve:

1. Explosive environment: The corresponding explosion-proof grade products must be selected. For outdoor installation or dusty occasions, waterproof and dustproof varieties should be used.

2. The nominal pressure of the solenoid valve should exceed the maximum working pressure in the pipe.

3, corrosive medium: plastic king solenoid valve and all stainless steel should be used; for strong corrosive media must use isolation diaphragm. Example CD-F.Z3CF. Neutral medium, it is also advisable to use steel alloy as the solenoid valve of the valve shell material. Otherwise, the rust often falls off in the valve shell.

Especially in the case of infrequent movements. Ammonia valves cannot be made of copper.

Third, the reliability of the solenoid valve:

1. Working frequency: When the operating frequency is high, the structure should be a direct-acting solenoid valve, and the power supply should be preferred.

2. Operational reliability Strictly speaking, this test has not been officially listed in China's professional standards for solenoid valves. In order to ensure quality, brand-name products of regular manufacturers should be selected. In some occasions, there are not many movements, but the reliability requirements are very high, such as fire protection, emergency protection, etc.

Don't take it lightly. It is especially important to take two dual insurances.

3, working life, this item is not included in the factory test project, is a type test project. In order to ensure the quality, we should choose the famous brand products of regular manufacturers.

4. Work system: divided into long-term work system, repeated short-time work system and short-term work system. The company's conventional products are long-term work, that is, the coil allows long-term power supply work. For long-time valve opening only when it is closed for a short time, it should be used normally.

  The electromagnetic valve. When used in short-time work and large batch sizes, special orders can be made to reduce power consumption.

Fourth, the applicability of the solenoid valve:

1, pipeline parameters

2, 1 According to the flow rate and valve Kv value, the nominal diameter is selected, and the inner diameter of the pipe can also be selected. Please note that some manufacturers do not have a Kv value, often the valve hole size is smaller than the interface diameter, and must not be greedy and low.

2, 2 working pressure difference The minimum working pressure difference is above 0,04Mpa is optional indirect pilot type; the minimum working pressure difference is close to or less than zero must use direct-acting or step-by-step direct type.

2, 3 Select the valve port and model according to the medium flow requirements and pipe connection. For example, for a pipe to switch to two pipes, choose CA5 and Z3F for small diameter, ZDF-Z1/2 for medium or large diameter. Another example is controlling two pipe sinks.

For the flow, please choose ZDF-Z2/1.

2, media characteristics

1, 1 medium cleanliness should be equipped with a recoil filter valve in front of the solenoid valve, low pressure fashion can use a direct-acting diaphragm solenoid valve for example CD-P.

1, 2 If the medium is directional, and does not allow backflow ZDF-N and ZQDF-N to use two-way circulation, please make special requirements.

1, 3 medium temperature should be selected within the allowable range of the solenoid valve.

1, 4 quality gas, liquid or mixed state respectively choose different kinds of solenoid valves, 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 used

Gas. Liquid. It is best to specify the media status when ordering, and the installation user does not have to adjust.

1, 5 medium temperature products of different specifications, otherwise the coil will burn off, the seals will age, seriously affecting the life expectancy.

1,6 medium viscosity, usually below 50cSt. If this value is exceeded, the ZDF series multi-function solenoid valve is used for special order with a diameter greater than 15mm. A high viscosity solenoid valve with a diameter of less than 15 mm.

3, power supply conditions

4, 1 power supply voltage fluctuations usually use +%10%, -15% AC, DC allow ±%10 or so, if the difference is excessive, it is necessary to take voltage regulation measures or put forward special order requirements.

4, 2 should select the rated current and power consumption according to the power supply capacity. It should be noted that the VA value is higher when the AC starts, and the indirect guided solenoid valve should be preferred when the capacity is insufficient.

4, 3 According to the type of power supply, select AC and DC solenoid valves. Generally, AC power is convenient to use.

4, 4 voltage specifications should be used as much as possible AC220V, DC24V.

4, control accuracy

5, 1 action time: refers to the electrical signal is turned on or off to the main valve action completion time, only the company's patented product multi-function solenoid valve can adjust the opening and closing time separately, not only can meet the control accuracy requirements, but also prevent water hammer damage.

5, 2 The amount of leakage given on the sample of leakage is the common economic grade. If it is too high, please make a special order.

5, 3 ordinary solenoid valve only open and close two positions, please use multiple solenoid valves when the control accuracy is high and the parameters are stable; Z3CF three normally open solenoid valves, with micro-opening, full opening and closing three kinds of flow ;ZDF-Z1/1 combination multi-function

The magnetic valve has four flows of full opening, large opening, small opening and full opening.

5. Environmental conditions

3, 1 in the use of corrosive or explosive environment should be preferred to choose corrosion resistance according to safety requirements

3, 2 If the environmental space is limited, please use the multi-function solenoid valve, because it eliminates the bypass and three manual valves and is convenient for online maintenance.

3, 3 The highest and lowest temperature of the environment should be selected within the allowable range. If there is an out of tolerance, special orders should be made.

3, 4 environment with high relative humidity and water droplets and rain, etc., should choose waterproof solenoid valve

3, 5 environment often has vibration, bumps and impacts, etc. should choose special varieties, such as marine solenoid valves.