Characteristics And Principles Of Metal Hard Seal Stainless Steel Ball Valve

3 Piece Threaded Ball Valve is specially designed for industrial and mining conditions with medium temperature higher than 300℃. The sealing form adopts metal ball to metal valve seat sealing, which has the advantages of high temperature resistance, wear resistance, fire prevention, anti-static, etc. Floating ball valve or fixed ball valve structure can be selected. High-pressure hard-sealed stainless steel ball valve is evolved from the plug. Its opening and closing parts are used as a sphere, and the sphere is rotated 90 degrees around the axis of the valve stem to achieve the purpose of opening and closing.

Stainless steel ball valves are mainly used to cut off, distribute and change the flow direction of the medium on the pipeline. Stainless steel ball valves designed with V-shaped openings also have excellent flow regulation functions. Stainless steel ball valves are not only simple in structure and good in sealing performance, but also small in size, light in weight, low in material consumption, small in installation size within a certain nominal diameter range, and small in driving torque. It is easy to operate and easy to achieve rapid opening and closing. It is one of the fastest-growing valve varieties in the past decade. Especially in industrially developed countries such as the United States, Japan, Germany, France, Italy, Spain, and the United Kingdom, stainless steel ball valves are widely used, and the types and quantities of use are still expanding, and they are developing towards high temperature, high pressure, large diameter, high sealing, long life, excellent adjustment performance, and one valve with multiple functions. Its reliability and other performance indicators have reached a high level, and it has partially replaced gate valves, stop valves, and throttle valves.

With the improvement of the technology of stainless steel ball valves, in the foreseeable short term, they will be more widely used, especially in oil and gas pipelines, oil refining cracking equipment, and nuclear industry. In addition, in the large and medium-sized caliber, medium and low pressure fields of other industries, stainless steel ball valves will also become one of the leading valve types. The working principle of stainless steel ball valves is to make the valve smooth or closed by rotating the valve stem.

Q41Y metal hard seal stainless steel ball valve features stainless steel ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. Stainless steel ball valve is a new type of valve widely used in recent years. It has the following advantages:

1. Low fluid resistance, and its resistance coefficient is commensurate with the pipe section of the same length.

2. Simple structure, small size and light weight.

3. Tight and reliable. At present, the sealing surface material of stainless steel ball valve is widely used in plastic, with good sealing performance, and has been widely used in vacuum systems.

4. Easy to operate, quick to open and close, only need to rotate 90° from full open to full closed, which is convenient for long-distance control.

5. Easy to maintain. The stainless steel ball valve has a simple structure, and the sealing ring is usually moving, which is convenient for disassembly and replacement.

6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the medium will not cause erosion of the valve sealing surface when passing through.

7. Wide range of applications, diameters range from a few millimeters to several meters, and can be used from high vacuum to high pressure. Stainless steel ball valves have been widely used in petroleum, chemical industry, liquefied gas, water supply and drainage, food, pharmaceuticals, power generation, papermaking, urban construction, mining, boiler steam systems, and municipal administration.

Advantages of Q41Y metal hard seal stainless steel ball valve:

1. It has the lowest flow resistance (actually zero).

2. Because it will not get stuck during operation (when there is no lubricant), it can be reliably used in corrosive media and low-boiling liquids.

3. It can achieve complete sealing within a large pressure and temperature range.

4. It can achieve rapid opening and closing, and the opening and closing time of some structures is only 0.05-0.1s to ensure that it can be used in the automation system of the test bench. When the valve is opened and closed quickly, the operation is impact-free.

5. The ball-type closing piece can be automatically positioned in position.

6. The working medium is reliably sealed on both sides.

7. When fully open and fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, so the medium passing through the valve at high speed will not cause erosion of the sealing surface.

8. With compact structure and light weight, it can be considered the most reasonable valve structure for low-temperature medium system.

9. The valve body is symmetrical, especially the welded valve body structure, which can well withstand the stress from the pipeline.

10. The closing part can withstand the high pressure difference when closed.

Important selection principles of Q41Y metal hard seal stainless steel ball valve:

1. For the main pipelines of oil and natural gas transmission and necessary cleaning pipelines, which need to be buried underground, choose full-diameter, full-welded stainless steel ball valves; for buried on the ground, choose full-diameter welded connection or flange-connected stainless steel ball valves; for branch pipes, choose flange connection, welding connection, full-diameter or reduced-diameter stainless steel ball valves.

2. For the pipelines and storage equipment of finished oil, choose flange-connected stainless steel ball valves.

3. For city gas and natural gas pipelines, floating stainless steel ball valves with flange connection and internal thread connection should be selected.

4. For oxygen pipeline systems in metallurgical systems, fixed ball stainless steel ball valves with flange connection after strict degreasing treatment should be selected.

5. For low-temperature medium pipeline systems and installations, low-temperature stainless steel ball valves with valve covers should be selected.

6. For the pipeline systems of catalytic cracking equipment of oil refining equipment, lifting rod stainless steel ball valves can be selected.

7. For the equipment and pipeline systems of corrosive media such as acids and alkalis in chemical systems, all-stainless steel stainless steel ball valves made of austenitic stainless steel and with polytetrafluoroethylene as valve seat sealing rings should be selected.

8. For high-temperature medium pipeline systems or installations in metallurgical systems, power systems, petrochemical equipment, and urban heating systems, metal-to-metal sealed stainless steel ball valves can be selected.

9. When flow adjustment is necessary, a worm gear driven, pneumatic or electric regulating stainless steel ball valve with V-shaped opening can be selected.