Flange connection steel globe valve is suitable for the nominal pressure 1.6 MPa, or working temperature - 29 ~ 550 ℃ in the petroleum, chemical, pharmaceutical, chemical fertilizer, power industry, such as the pipeline under various working conditions, cut off or connect pipe medium. Suitable media: water, oil, steam, acid medium, etc. The operating methods are manual, gear transmission, electric, pneumatic and so on.

It is a mandatory sealed valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the lower part of the valve disc, the resistance needed to be overcome by the operating force is the friction between the stem and packing and the thrust caused by the pressure of the medium. In recent years, since the appearance of self-sealing valve, the medium flow direction of cast steel globe valve is changed from the upper part of valve disc to the valve cavity. At this time, under the action of medium pressure, the force of closing valve is small, while the force of opening valve is large, and the diameter of valve stem can be reduced accordingly. At the same time, under the action of media, this kind of valve is also more rigorous. Our country valve "3 change give" once stipulated, cast steel stop valve direction, all adopt from top to bottom.

Above is the introduction of the globe valve, I hope it will help you.

The article comes from: http://www.leahmatson.com