date back the history of electromagnetic valve, electromagnetic valve at home and abroad so far, in principle can be divided into three categories: ( Namely: straight acting, with pilot operated step by step, and from the disc structure and material of different and the difference on the principle is divided into six branches small class ( Diaphragm structure, step by step of moving heavy piece of membrane structure, the structure, the forerunner in straight moving piston structure, step by step piston structure, the forerunner of moving piston structure) 。

direct acting solenoid valve

principle: electricity, electromagnetic coil to produce electromagnetic force to shut down from the seat lift, the valve opening; Power, the electromagnetic force disappears, press on the seat, spring to close the valve closed. Features: in a vacuum, negative pressure, can work properly when the zero pressure, but size is generally not more than 25 mm.

distribution of direct acting solenoid valve

principle: it is a direct acting and pilot operated the principle of combining, when the inlet and outlet no pressure difference, after electrify, electromagnetic force directly to the pilot valve and main valve closed, in turn, lift, the valve opens. When the inlet and outlet at startup pressure difference, after electrify, the electromagnetic pilot valve, main valve inferior vena pressure rising, the cavity pressure drop, which using differential pressure to the main valve opened up; Power cuts, pilot valve using the spring force or medium pressure push off, move down, to close the valve. Features: on the zero differential pressure or vacuum and high pressure, to * action, but power is larger, requirements must be installed level.

the guide type solenoid valve

principle: electricity, electromagnetic force open the pilot hole, the chamber pressure drops rapidly, in closed form around the high low differential pressure, fluid pressure push close up, the valve open; Power off, the spring force to close the guide hole, inlet pressure chamber through the by pass hole quickly in closing Industrial Valves using a form around the high differential pressure, fluid pressure push close move down, close the valve. Features: high fluid pressure range limit, can be arbitrary installation ( Need to customize) But fluid differential pressure conditions must be met.

solenoid valve installation and maintenance of

read product manual carefully before installation, check whether products conform to the requirements of the use, remember the key points of installation and ready for work. Proofreading nameplate by standard parameters and the parameters of the selected products are consistent, the power supply voltage should be meet the rated voltage range: + 10% ~ - Dc + 10% ~ 15%, - 10%, coil components should not be open at ordinary times. Before taking over with 0. 3 mpa pressure pipe flushing, the metal powder in the pipeline and the sealing material residues, scale and rust removal, etc. Pay attention to the cleanliness of medium, if within the medium mixed with dirt and impurities, such as not impair the normal work of the solenoid valve, pipe should be installed in the filter valve mesh & ge; 60 mesh.

solenoid valve should not be installed in the pipeline dips, installed in the discharge pipe of container, pay attention to not from the bottom of the container to elicit, and should be installed at the bottom of the container is a bit position. If water hammer will be the media, should choose the solenoid valve with the function of water hammer or take appropriate preventive measures.

steam entry side by electromagnetic valve should be equipped with steam trap, it take over should tilt, electromagnetic valve is generally directed, not backward, usually the body using & other; → ” Points out that the medium flow direction, to in accordance with the installation & other; → ” Indicate the direction of the installation but the company may sometimes in the vacuum tube road or special circumstances have proposed an exception.

installation position: general, electromagnetic valve, electromagnetic coil components should be vertical upward vertical installed in a horizontal pipe at the ground, if the space restrictions or conditions required by the side, like the building sewer pipe or inverted installation, please put forward in the selection of orders. Some products have special rules, please follow the instructions to install. Control of attention when sealing material do not use too much. Such as threaded connection, to take over the thread should be kept within the effective length, and in the end half pitch with file chamfering, since end 2 tooth starting winding sealing strip, or excessive seal belt or binder will be into the lumen of electromagnetic valve, and interfere with the normal movement of accident.

solenoid valve installation area should be reserved space, so that the daily maintenance and regular maintenance. When installed using a wrench or pliers fixed body, turn over again, never will force in the electromagnetic coil components caused by the deformation, the electromagnetic valve is difficult to work properly. In pipeline insufficient rigidity, or under the condition of water hammer, the Industrial Valves before and after taking over with bracket, please. In the frozen place when using, must pipe protected with insulating material or set the heater in the line. To confirm, electromagnetic valve itself and it if there is a leak and take over the joint. To coil lead wire connection to check, especially the three lead. Connection in electromagnetic valve of the electrical components, such as relay, contactor and on off. Contact should not be vibration when open the valve, otherwise the work will be unreliable, and affect the electromagnetic valve life. Line of the electric circuits to access the corresponding insurance, as the electric circuits of the protection.

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