Electromagnetic valve repair using common sense

An electromagnetic valve security: pay attention to safety will lead to disaster!

 1. Aggressive media: the king should use plastic and stainless steel solenoid valves; for highly corrosive media must use isolation diaphragm. Example CD-F. Z3CF. Neutral medium, it should use copper alloy shell material for the valve solenoid valves, otherwise, the valve chip off the shell often rust, especially where the action is not frequent. Ammonia can not be used with the valve copper.

    2 explosive environments: explosion-proof grade must use the appropriate products, open more applications to install or dust should use waterproof, dustproof varieties.

    3 Electromagnetic valve nominal pressure tube should be more than the maximum working pressure.

    Two electromagnetic valves Applicability: Not applicable fee equal pay for things, but also trouble!

    1 Media Features

    1.1 quality of gas, liquid or mixed states were selected to different kinds of electromagnetic valves, for example ZQDF for air, ZQDF-Y for liquid, ZQDF-2 (or -3) for steam, or lead to malfunction. ZDF series solenoid valve can be multi-functional all at the gas, liquid. When told that the media provide the best state, the user will not have to install the tuning.

    1.2 Medium temperature products with different specifications, otherwise the coil will burn, aging seals, seriously affecting the life of life.

    1.3 medium viscosity, usually 50cSt below. If more than this value, diameter greater than 15mm solenoid valves with the ZDF series multi-function for special orders. Diameter less than 15mm solenoid valves provide a high viscosity.

    1.4 medium cleanliness is not high when the electromagnetic valve should be fitted with recoil before the filter valve, low pressure style diaphragm can be used direct-acting solenoid valves for example, CD-P.

    1.5 If the directional flow of media, and does not allow back ZDF-N and ZQDF-N single two-way flow required, please make a special request.

    1.6 medium temperature should be chosen within the allowable range of electromagnetic valves.

    2 electromagnetic valve pipe parameters

    2.1 According to media flow requirements and select the connection pipe valve door openings and models. For example, two pipes for a pipeline to the switch, the small diameter of the election CA5 and Z3F, medium or large diameter select ZDF-Z1 / 2. Another example is the convergence of the two pipelines control, select ZDF-Z2 / 1 and so on.

    2.2 Kv based on traffic and the value of the selected gate valve nominal diameter, also available with pipe diameter. Please note that some manufacturers are not marked with the Kv value, often less than the interface size of the valve hole diameter, must not seek the lowest and the villain.

    2.3 Working pressure above the minimum working pressure is used in 0.04Mpa indirect Pilot; minimum working pressure close to or less than zero must be selected or sub-step direct-acting direct style.

    3 Environmental conditions

    3.1 environment, the maximum and minimum temperature should be chosen within the allowable range, if any tolerance for special orders to be made.

    3.2 environment with high relative humidity and rain water droplets and other occasions, water solenoid valves should be selected.

    3.3 environment, constant vibrations, bumps and shocks should be selected where special varieties, such as marine electromagnetic valve.

    3.4 in a corrosive or explosive environments with security requirements should be selected according to priority-resistant hair-loss.

    3.5 If the restricted environmental space, please use the multi-function solenoid valve, because it eliminates the need for bypass and three manual valves and easy online service.

    4 Electromagnetic valve power supply conditions

    4.1 According to the power supply types, were selected to AC and DC solenoid valves. Generally speaking, convenient access to AC power.

    4.2 Voltage specification with the best preferred AC220V.DC24V.

4.3 AC power supply voltage fluctuations are usually used +% 10% .- 15%, DC to allow ±% 10 or so, should the ultra-poor, regulators should take measures or make a special order request.

    4.4 rated capacity selection should be based on current supply and consumption of power. VA should be noted that the exchange value of the higher starting, lack of capacity should be preferred in the indirect conduction electromagnetic valves.

    5. Electromagnetic valve control accuracy

    5.1 Only ordinary electromagnetic valve opening and closing two locations, in the control parameters requires high precision and smooth when you use a number of electromagnetic valves; Z3CF three normally open solenoid valve, with a low lift, fully open and close the three kinds of flow; ZDF-Z1 / 1 multi-function solenoid valve combined with full, wide open, small open, full four traffic.

    5.2 Operating Time: refers to the electrical signal to the main valve is turned on or off the action completion time, only the company's patented multi-function solenoid valve for opening and closing time can be adjusted separately, not only to meet the control precision, but also to prevent water hammer damage.

    5.3 leakage leakage given the sample values ​​for common economic level, if too high, please make a special order.

    Third, the electromagnetic valve reliability: unreliable and would undermine the entire system!

    1, working life, this pilot project is not included in the factory, belonging to type test items. Should be selected to ensure regular quality brand-name manufacturers.

    2, the working standard: sub-system of long-term, repeated short-term and short-term work system work system of three. The company's conventional products are long-term work system that allows long-term power coil work. For a long time the door opened only a short time the valve closed, then it should use normally open solenoid valve. Short-term work system used in large quantities when they can be used as a special order to reduce power consumption.

    3, the working frequency: high frequency requirements of the action, the structure should be optimized direct-acting solenoid valves, preferred to listen to AC power.

    4, operating reliability strictly speaking to the pilot solenoid valve has not been formally included in our professional standards, to ensure quality brand-name manufacturers should be regular election. Some occasions the number of operations is not much, but the reliability is very high, such as fire, emergency protection, must not be taken lightly. Particularly important, should be taken once every two double insurance.

    Four electromagnetic valves Economy: The economy is not for money, energy and even a waste of life

It selects one of the scale, but must be safe, suitable and reliable based on the economy. Economy is not only the price of the product, but also to give priority to their function and quality of installation and maintenance, and other accessories required for the costs. More importantly, a solenoid valve in the automatic control system in the entire production line automatic control system as well as the share of the cost is minimal, if any cheap and the wrong choice early damage group is enormous.

Five electromagnetic valve repair

       Electromagnetic valve gate valve repair and maintenance needs of professional maintenance personnel to operate, depending on the location of the electromagnetic valves used to develop different solenoid valve maintenance program, the use of special tools and repair gate valve gate valve repair equipment, electromagnetic Valve repair and maintenance work.