Overview of explosion-proof solenoid valves

Overview of explosion-proof solenoid valves

Media characteristics:

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

　　 2. Products with different specifications of medium temperature, otherwise the coil will burn out and the seal will be aging, which will seriously affect the life.

　　3. If the medium is in directional circulation, and reverse flow is not allowed, ZDF-N and ZQDF-N need to use two-way circulation, please make special requirements.

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

　　 5. Medium viscosity, usually below 50cSt. If it exceeds this value, use ZDF series multifunctional solenoid valve for special order if the diameter is larger than 15mm. Order high viscosity solenoid valve with diameter less than 15mm.

　　6. Different types of solenoid valves are selected for quality gas, liquid or mixed state. For example, ZQDF is used for air, ZQDF-Y is used for liquid, and ZQDF-2 (or -3) is used for steam, otherwise it is easy to cause malfunction. The ZDF series multi-function solenoid valve can pass air and liquid. The media status will be notified when ordering, so that the installation user does not need to adjust.

Pipeline parameters:

　　 1. Working pressure difference

　　If the low working pressure difference is above 0.04Mpa, the indirect pilot type can be selected; if the low working pressure difference is close to or less than zero, the direct-acting type or the stepwise direct type must be selected.

　　 2. Select the nominal diameter according to the flow rate and the valve Kv value, and the same pipe inner diameter can also be selected. Please note that some manufacturers do not mark the Kv value, and often the valve hole size is smaller than the interface pipe diameter.

　　 3. Choose valve port and model according to medium flow requirements and pipe connection mode. For example, for switching from one pipe to two pipes, choose CA5 and Z3F for small diameters, and ZDF-Z1/2 for medium or large diameters. Another example is to control the confluence of two pipelines, please choose ZDF—Z2/1, etc.

Environmental conditions:

　　 1. In the environment with high relative humidity and water droplets and rain, etc., a waterproof solenoid valve should be selected.

　　2. For use in corrosive or explosive environments, corrosion resistance should be selected according to safety requirements.

　　3. The high and low temperature of the environment should be selected within the allowable range. If there is any over-tolerance, a special order should be made.

　　 4. There are frequent vibrations in the environment, and special varieties should be selected for occasions such as bumps and impacts of the colored quartz tube level gauge, such as marine solenoid valves.

　　 5. If the environmental space is restricted, please use multifunctional solenoid valve, because it saves the bypass and three manual valves and is convenient for online maintenance.

Power conditions:

　　 1. For voltage specifications, try to give priority to AC220V.DC24V.

　　 2. According to the type of power supply, select AC and DC solenoid valves respectively. Generally speaking, AC power is easy to access.

　　 3. The power supply voltage fluctuation is usually %.-15% for AC, and DC allows about ±. If it is out of tolerance, voltage stabilization measures must be taken or special order requirements must be made.

　　 4. The rated current and power consumption should be selected according to the power supply capacity. It should be noted that the VA value is higher during AC starting, and the indirect pilot solenoid valve should be preferred when the capacity is insufficient.

control precision:

1. Action time: refers to the time from when the electrical signal is switched on or off to the completion of the main valve action. Only our patented multifunctional solenoid valve can adjust the opening and closing time separately, which not only meets the control accuracy requirements, but also prevents water hammer damage .

2. Ordinary solenoid valve has only two positions, open and closed. If the control accuracy is high and the parameters are required to be stable, please choose a multi-position solenoid valve; Z3CF three-position normally open solenoid valve, with a slight opening, fully open And close three kinds of flow; ZDF—Z1/1 combined multi-function solenoid valve has four kinds of flow: full open, wide open, small open and full open.

This article is original by the manufacturer of high temperature solenoid valve, please indicate http://www.sungofluid.com/