Globe valve structure is simple, the valve stem can both rotate and lift the principle of the valve to open or cut off, and to ensure that the valve seal and sealing function. Due to the special kinematic principle of the structure, it also brings about extremely unfavorable consequences on the force acting on the seal on the valve (the necessary vertical pressure between the seal pairs and the relative slip between the seal pairs). Practice has proved that the valve on the seal often open and close only a few times, because of the seal between the scratch caused by leakage. Slight scratches need to be disassembled and repaired, and the serious bruise is scrapped due to damage. Such consequences not only increase the manufacturing cost of the enterprise but also affect the performance of the valve. To solve such problems on the valve seal structure and materials have been tested and improved. â‘  the valve stem on the seal to move to the valve flap (purpose is to force the process, the valve flap on the sealing surface relative to the valve cover on the sealing surface in a static non-slip state). Although this improvement can improve the life of the seal, but because of the valve cover to add a valve cover between the seal makes the structure more complex, lower cost. â‘¡ change the sealing material. In the stem seal conical surfacing anti-scratch good Stellite hard alloy, although this method has achieved good results, but because Stellite alloy costs are too high, on the other hand stem The basic material for the 13Cr martensitic stainless steel, poor weldability, pre-welding to be welded when welding, welding insulation and welding process complex. In addition, to ensure the dimensional accuracy of the stem, but also increase the roughing process. Comprehensive analysis, in addition to special requirements, the program is not good value for money. Practice has proved that to improve the stem cone surface hardness is to improve the life of the valve on the feasible way.

Welding Bar

Tungsten carbide welding bars are commonly used in the oil and gas industry for various applications. These bars are made from a combination of tungsten and carbon, which results in a very hard and wear-resistant material. Here are some specific uses of tungsten carbide welding bars in the oil and gas industry:

1. Hardfacing: Tungsten carbide welding bars are used for hardfacing applications, where a wear-resistant layer is applied to drilling tools, valves, pumps, and other equipment exposed to abrasive environments. This helps to extend the lifespan of the components and reduce maintenance costs.

2. Drill bits: Tungsten carbide welding bars are used to manufacture drill bits for oil and gas exploration. The hard and durable nature of tungsten carbide makes it ideal for drilling through tough rock formations.

3. Wear plates and liners: Tungsten carbide welding bars are used to create wear plates and liners for equipment used in oil and gas production. These plates and liners protect the underlying metal surfaces from abrasion and corrosion, ensuring the longevity of the equipment.

4. Valve seats and seals: Tungsten carbide welding bars are used to manufacture valve seats and seals for oil and gas valves. The high hardness and wear resistance of tungsten carbide ensure reliable sealing and prevent leakage in critical applications.

5. Downhole tools: Tungsten carbide welding bars are used in the manufacturing of downhole tools such as stabilizers, reamers, and drill collars. These tools are subjected to high pressures, temperatures, and abrasive conditions, and tungsten carbide helps to enhance their durability and performance.

Overall, tungsten carbide welding bars play a crucial role in the oil and gas industry by providing wear resistance, hardness, and durability to various components and equipment.

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