us standard welding globe valve application:

The main steam system includes main steam piping from the boiler superheater outlet header to the turbine inlet main steam valve, valves, drains, and steam branches to the new steam equipment. The function of the main steam drainage is to automatically exclude the non-condensable gas such as steam condensate and air in the heating equipment or steam pipeline, and do not leak steam. Because the American standard welded stop valve of our valve has the function of steam blocking and drainage, it can make the steam heating equipment evenly heat, and the main steam drainage can make the whole project device work safely and stably, and it is safe and worry-free.

Product features:

The welded stop valve is connected with the pipeline by welding structure. The sealing surface is not easy to wear and scratch, with good sealing performance and long service life. Welded globe valve has the advantages of compact structure, good opening and closing, small height and convenient maintenance. Welded cut-off valve is suitable for water and steam oil pipelines, with the characteristics of high temperature resistance and high pressure resistance. Welded globe valve, simple structure, convenient manufacturing and maintenance. The working stroke is small and the opening and closing time is short. Welded globe valve has good sealing performance, small friction between sealing surfaces and long service life.

 

 

Good sealing, quick opening and closing Structure is simpler than the gate valve, manufacturing and maintenance are more convenient. The sealing surface is not easy to wear and scratch, and the sealing performance is good. There is no relative sliding between the valve clack and the sealing surface of the valve body when opening and closing, so the wear and abrasion are not serious, the sealing performance is good, and the service life is long.

Easy to operate, suitable for cutting or adjusting The stem axis of the globe valve is perpendicular to the sealing surface of the valve seat. The valve stem opening or closing stroke is relatively short, and has a good cut-off action, making this valve is very suitable for use as a medium cut or adjustment and throttling.

Strong scour resistance The disc has strong resistance to erosion of welded carbide. Pressure self-sealing design, the pressure fluctuation of the medium has no effect on the sealing performance.

The working principle of American standard welded stop valve:
 

Cut-off valve, also called cut-off valve, is a widely used valve, it is popular, is due to the opening and closing process between the tight cover friction is small, more durable, open height is not easy to manufacture, easy maintenance, not only suitable for low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve lever to make the valve clack sealing surface and the valve seat sealing surface closely fit to prevent the medium from circulating. The cut-off valve only allows the medium to flow in one direction and is directional when installed. The structure length of the stop valve is greater than the gate valve, and the fluid resistance is large. During long-term operation, the sealing reliability is not strong.

 

 

Material standard

1. Design and manufacture according to BS5352, MSS SP-118;
2. The size of socket shall be in accordance with ANSI B16.11;JB/T1751
3. The dimension of thread end shall be in accordance with ANSI B1.20.1;JB/T7306
4. The size of butt welding end shall be in accordance with ANSI B16.25;JB/T12224.
5. The size of flange end shall be in accordance with ANSI B16.5;JB79
6. Valve Inspection and Test API 598; GB/T13927; JB/T9092
Structural features Bolted bonnet (B.B) and open stem bracket (OS & Y) Welded bonnet (W. B) and open stem bracket (OS & Y)