Our North Valve Group Co., Ltd. is a manufacturer of research and development, production and sales of standard general industrial valves such as steam control valves, ball valves, gate valves, butterfly valves and globe valves, with diameters ranging from 10mm to 3000mm and nominal pressure PN ranging from 1Mpa to 80Mpa. At the same time, we can also customize non-standard valves for you. Welcome to call us.
1. Forced sealing of the steam control valve Tighten the flange bolt, and exert a pressing force on the sealing gasket, so that the pre-tightened gasket is tightened and the uneven micro-gap on the sealing surface is filled. In this way, the leakage of the medium is prevented, and the initial sealing condition is formed-the pre-tightening specific pressure is formed on the sealing surface.
When the medium pressure rises and the valve is operated, the pre-tightening specific pressure on the sealing surface decreases and the gasket rebounds. Typical structures of forced seal are flat gasket seal, surrounding gasket seal and toothed gasket seal. Usually used for low-pressure, medium-pressure and medium-small caliber steam regulating valves.
ZZYP self-operated pressure regulating valve
2. Before the self-tight sealing of the steam regulating valve is boosted, tighten the bolt to make the valve cover rise, so that the initial sealing condition is formed between the valve cover and the wedge gasket and between the valve body and the wedge gasket-the pre-tightening specific pressure on the sealing surface. When the medium pressure rises, the valve cover moves upward under the action of the medium pressure, and the sealing specific pressures between the steam control valve cover and the wedge gasket and between the valve body and the wedge gasket gradually increase with the increase of pressure.
It should be emphasized that in self-tight sealing, the medium pressure always tends to add pre-tight sealing specific pressure and improve sealing performance. The higher the medium pressure, the greater the specific pressure of the working seal and the better the sealing performance. According to this feature, self-sealing as a high-pressure sealing technology is often used in high-temperature and high-pressure large-diameter regulating valves.
After reading the principle of self-sealing bonnet of steam control valve, I believe you have a certain understanding of steam control valve. Our North Valve Group Co., Ltd. is a manufacturer of steam control valve. For decades, the company has sold high-quality valve products, and the product technology and quality have been certified by national authorities, reaching national standards and deeply trusted by customers.
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Release time：2024-03-19