About the characteristics and applicability of normally closed solenoid valve

Main parameters of the pipeline

Select the gate valve port and model specification according to the medium inflow regulations of the pilot diaphragm solenoid valve and the pipeline-interface method. For example, to convert from one pipe to two pipes, select CA5 and Z3F for small diameters and ZDF-Z1/2 for medium-level or large car diameters. Also, select ZDF-Z2/1, etc. to operate both headers.

Select the nominal diameter pipe diameter according to the user flow and Kv value of the gate valve or select the same nominal diameter of the pipe. Note that some manufacturers do not mark the Kv value, usually, the valve hole size is lower than the socket diameter.

Working pressure difference

When the low-power differential pressure is greater than 0.04Mpa, the indirect conduction type can be selected; when the low-power differential pressure is close to or below zero, the direct-acting or graded immediate type must be used.

Natural environment standard

The high and low ambient temperature of the natural environment should be within the allowable range. If there are any deviations, the order should be clearly stated.

In the natural environment with high air humidity, water droplets and rain, the moisture-proof solenoid valve should be used.

Where there are often vibrations, bumps and shocks in the natural environment, it should be a unique type, such as ship solenoid valves.

When used in corrosive or flammable and explosive environments, corrosion resistance should be selected first according to safety regulations.

If the indoor space is limited by the natural environment, please choose the multi-function solenoid valve, because it saves the bypass and three manual valves, which is convenient for online maintenance. Switching power supply standard Depending on the type of power source for the distribution switch, choose a communication AC and DC solenoid valve. In general, AC power is easily accessible. 2AC220V. DC24V is the first choice for working voltage specification.

The power supply voltage fluctuation is usually +%10% – 15% for communication and AC, and the DC voltage is allowed to be about ±%10. If deviations exist, Zener countermeasures must be employed or unique ordering requirements must be specified.

The rated voltage and output power consumption should be selected according to the capacity of the switching power supply. At the beginning of communication, it is necessary to pay attention to the high value of VA. When the capacity is insufficient, the indirect conductive solenoid valve should be selected first. accuracy

Generally speaking, the solenoid valve can only open and close two parts. When the accuracy requirements are high and the main parameters are required to be stable, please select multiple solenoid valves; Z3CF three-position switch solenoid valve, the total flow is micro-start, full-start, and shutdown; The multifunctional solenoid valve composed of ZDF-Z1/1 has four total flow rates: fully open, big good, small moon and fully open.

Posture duration: refers to the duration of the connection or disconnection of the electronic signal of the normally closed solenoid valve 220v to the posture of the dispensing valve.

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