Diaphragm type fully automatic solenoid valve

NegotiableUpdate on 03/07

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Nature of the Manufacturer: Producers

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Overview

When the system pressure difference increases and exceeds the set value of the controller, the diaphragm type fully automatic solenoid valve will further open, and more water will flow through the bypass valve, thereby reducing the system pressure difference. The decrease in pressure difference causes the valve to start closing and the system pressure difference to increase.

Product Details

　　Diaphragm type fully automatic solenoid valvePrinciple:

Mainly composed of a pilot valve and a main valve, the main valve adopts a rubber sealing structure. When in the constant position, the movable iron core seals the pilot valve port, the pressure inside the valve chamber is balanced, and the main valve port is closed. When the coil is energized, electromagnetic force is generated to attract the movable iron core, causing the medium in the main valve chamber to leak out from the pilot valve port, resulting in a pressure difference. The diaphragm or valve cup is quickly lifted, and the main valve port opens, opening the valve. When the coil is powered off, the magnetic field disappears, the movable iron core resets, the pilot valve port is closed, and after the pressure inside the pilot valve and main valve chamber is balanced, the valve is closed again.

When the coil is powered on, the electromagnetic force opens the pilot hole, causing the pressure in the upper chamber to rapidly decrease, creating a high and low pressure difference around the diaphragm, pushing it upwards and opening the valve; When the power is cut off, the spring force closes the pilot hole, and the inlet pressure quickly enters the upper chamber through the bypass hole, forming a pressure difference of lower and higher around the diaphragm, pushing the diaphragm downwards and closing the valve

　　Media characteristics of diaphragm type fully automatic solenoid valve

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.

use

1. Generally speaking, these products are placed horizontally. If they are installed on the side, it may cause the valve to not close tightly, resulting in internal leakage. Therefore, during installation, it is necessary to avoid side installation. In addition, if the seal between the piston and the valve seat is not good after a long period of use, the cover of the piston must be re ground flat and then ground with the valve seat.

2. When working, be sure to pay attention to the front and rear pressure gauges of the valve to see if their pressure exceeds the rated pressure. If so, stop using them immediately and close the manual valves at the front and rear, otherwise it may cause the solenoid valve to explode and leak.

3. For this type of product, it is necessary to test it before use. After confirming that it is normal, it should be put into use. At the same time, the dirt on the large valve should be cleaned regularly. During operation, be careful not to damage the sealing surface. If it is not used for a long time, the front manual valve should be closed. When restarting, the condensed water should be drained before use.