2018年3月28日星期三
3/2 Solenoid valve
The 3/2 Solenoid valve is controlled by a double coil. One coil is instantly energized and the power is turned off. The valve is turned on. The other coil is instantly energized, and then the power is turned off and the valve is closed. It can be closed or open for a long time to make the coil last longer. Use best in high temperature piping. It is widely used in the fields of metallurgy, petrochemicals, pharmaceuticals, tobacco, food and medicine, urban construction environment protection, water supply and drainage, heating and air conditioning, fire safety, scientific research, energy saving industry and so on.
2018年3月16日星期五
2/2 Solenoid valve
2/2 Solenoid valve
1. The electromagnetic valve is divided into two categories:
1) direct moving solenoid valve:
Principle: when energized, the electromagnetic coil generates electromagnetic force to lift off the closing part from the seat and the valve opens; When the power is off, the electromagnetic force disappears, the spring closes the closing piece on the seat and the valve closes.
Features: normal working in vacuum, negative pressure and zero pressure, but generally not more than 25mm.
2) step by step 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 reach the starting pressure difference, after the power is energized, the electromagnetic force leads the small valve, and the pressure of the lower chamber of the main valve rises, and the upper chamber pressure drops, thereby pushing the main valve upward with the pressure difference. When the power is off, the pilot valve USES the spring force or medium pressure to push the closure and move down to close the valve.
1. The electromagnetic valve is divided into two categories:
1) direct moving solenoid valve:
Principle: when energized, the electromagnetic coil generates electromagnetic force to lift off the closing part from the seat and the valve opens; When the power is off, the electromagnetic force disappears, the spring closes the closing piece on the seat and the valve closes.
Features: normal working in vacuum, negative pressure and zero pressure, but generally not more than 25mm.
2) step by step 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 reach the starting pressure difference, after the power is energized, the electromagnetic force leads the small valve, and the pressure of the lower chamber of the main valve rises, and the upper chamber pressure drops, thereby pushing the main valve upward with the pressure difference. When the power is off, the pilot valve USES the spring force or medium pressure to push the closure and move down to close the valve.
2018年3月8日星期四
Steam valve
The steam valve is used on the medium pipe of the steam, type Y. The steam valve is also called the y-type globe valve, pneumatic Angle seat valve, air control Angle seat valve. Steam valve (hereinafter called Angle seat valve) to keep the velocity can save space, it USES a single function pneumatic actuators with spring security to manipulate the steering Angle seat valve, when used, should choose the normally open or normally closed.
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