Automatic antifreeze solenoid valve

NegotiableUpdate on 03/07

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Nature of the Manufacturer: Producers

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Overview

The automatic antifreeze solenoid valve is mainly used for defrosting air-cooled heat pump refrigeration units, and can also be used for defrosting supermarket refrigerators. The use of bidirectional solenoid valves will simplify the refrigeration system circuit and eliminate the number of one-way valves and solenoid valves in the system. On the one hand, it will make the system pipeline design more reasonable, and on the other hand, it can greatly reduce the cost of the unit.

Product Details

　　Applicability of automatic antifreeze solenoid valve:

1. Characteristics of the medium

1.1 Select different types of solenoid valves for gas, liquid or mixed states, for example, ZQDF is used for air, ZQDF-Y is used for liquid, ZQDF-2 (or -3) is used for steam, otherwise it may cause misoperation. The ZDF series multifunctional solenoid valve can be used for all purposes Liquid. Notify the media status at the time of booking, and the installation user does not need to adjust it again.

1.2 Different specifications of products with different medium temperatures, otherwise the coil will burn out and the sealing components will age, seriously affecting the service life.

1.3 The viscosity of the medium is usually below 50cSt. If the diameter exceeds 15mm, use the ZDF series multifunctional solenoid valve for special ordering. High viscosity solenoid valve with a diameter less than 15mm.

When the cleanliness of the medium is not high, a backwash filter valve should be installed in front of the solenoid valve. When the pressure is low, a direct acting diaphragm solenoid valve such as CD-P can be used.

If the medium flows in a directional manner and does not allow reverse flow, ZDF-N and ZQDF-N need to flow in both directions. Please make special requirements.

1.6 The medium temperature should be selected within the allowable range of the solenoid valve.

　　Common installation problems of automatic antifreeze solenoid valve:

1. First, it is necessary to check whether the solenoid valve is consistent with the main parameters selected for the model, such as power supply voltage, material working pressure, pressure difference, etc. Especially for the switch power supply, if it is wrong, it will burn out the solenoid coil. The power supply voltage should consider the fluctuation range of the rated current working voltage: communication AC 10%~-15%, DC 10%~-10%. Ordinary electromagnetic coil components are not suitable for disassembly.

2. The magnetic coil component of a general solenoid valve should be perpendicular to the upward direction and perpendicular to the pipeline installed on the road surface. If it is necessary to install it sideways due to indoor space limitations or working conditions, it needs to be clearly stated when selecting and ordering the model. Otherwise, it will cause the solenoid valve to not function properly.

3. Before docking, the pipeline should be cleaned to eliminate any metal powder, rubber seal residue, rust, and other debris in the pipeline. Pay attention to the cleanliness level of the substance. If there is dust, residue, or other substances that hinder the normal operation of the solenoid valve, a filtering device or filter screen should be installed in the pipeline.

4. If substances can cause water hammer phenomenon, then electromagnetic valves with moisture-proof hammer function should be used or effective preventive measures should be taken.

5. Manual emergency shut-off valves should be added to the front, back, left, and right sides of the solenoid valve, and a bypass should be installed to facilitate maintenance of the solenoid valve during common malfunctions.

6. Electromagnetic valves are generally fixed and cannot be installed in reverse. They are usually placed on the valve body to emphasize the direction of material flow. When installing, they should be installed according to the direction indicated in →. But it can be reversed in the vacuum solenoid valve circuit or under special circumstances.

7. The steam solenoid valve channel side should be equipped with a steam drain valve, and the proportional solenoid valve should be skewed at this point.

8. As much as possible, it is not necessary to keep the solenoid valve connected to the power supply for a long time, as this can easily reduce the service life of the solenoid coil and even burn it out. In other words, open and close, normally closed solenoid valves cannot be interchanged for use.