What is Fully Welded Ball Valve ?
Fully welded ball valve is a type of ball valve in the valve, which can be used for conveying media on pipelines such as petroleum, chemical, natural gas, pharmaceutical industry, food industry, etc. Fully welded ball valve from the literal meaning to explain, it adopts the whole welded structure, all the exposed gaps are welded in the way of welding, so the fully welded ball valve basically will not leak phenomenon, greatly improving the service life of the valve can reach 10 years. The fully welded ball valve has the characteristics of corrosion resistance, reliable sealing, convenient opening and closing, wide flow adjustment range, etc. It is a very common valve product in recent years.
Advantages of fully welded ball valve
- 01Due to the fully welded design of the valve body itself, no leakage can be ensured either from the valve body or outside the valve body, and it can be buried in the ground for a long time without erosion and long service life.
- 02The fully welded design makes the sealing of the ball valve itself very good, suitable for more media, a wide range of application, and a high safety factor in the pipeline system.
- 03Fully welded design can reduce or not apply bolts, simple structure, light weight, maintenance.
- 04The fully welded ball valve basically does not need to maintain the valve during use, avoiding the cost of downtime and maintenance.
- 05Simple structure, small size, light weight.
- 06When fully open or fully closed, the sealing surface of the ball and the seat is isolated from the medium, and the medium will not cause the erosion of the sealing surface of the valve.
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| The characteristics of fully welded ball valve |
The main components of the welded ball valve include the valve body, the valve cover, the valve stem and the ball, and the special thing is that it is connected by welding, replacing the traditional thread connection. In this way, the valve strength is improved, there is no leakage hazard caused by loose threads, and the air tightness is greatly improved. The fully welded structure features make the welded ball valve widely used in industrial pipeline flow switching and regulation, especially suitable for high pressure and corrosive conditions. Such as the pipeline system in the field of petrochemical industry. Welded ball valve has the characteristics of compact volume, easy to install on site. The tight fit between the ball and the seat also makes its adjustment characteristics and sealing performance outstanding. There is no need to worry about leakage risk during operation. The anti-leakage structure of the valve stem, the bottom of the valve stem has a PTFE self-sealing gasket and an O-ring, which is composed of 2 O-rings and two PTFE gaskets to ensure no leakage. |
| Technical Parameters | |
| Size | DN15-DN1500, 1/2''-60'' |
| Pressure | PN10-PN420, Class150-Class2500 |
| Temperature | -200°C to 650°C |
| Connection Type | Flange, Thread, Socket weld, Butt weld |
| Operation Mode | Manual, Pneumatic, Electric, Hydraulic, Gear operation |
| Materials | ||
| Valve Body | Forged | A105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, etc |
| Cast | WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc | |
| Valve Stem | F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500, N08020, Inconel625, Incoloy825, etc | |
| Valve Disc | A105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500，Incoloy825，WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc | |
| Seat Sealing | SS, BR, CU, AS, CS, AL, PTFE, NBR, FKM, AI203, etc | |
| Design Standards | |
| Valve Body | API 6D, API 608, ASME B16.34, DIN 3357, BS 5351, GOST 9833, JIS B2071, GB/T 12237, etc |
| Flange | ANSI B16.5, EN 1092-1, JIS B2220, GB/T 9113, ASME B16.47, GOST 12821, DIN 2543-2545, etc |
| Connection | ANSI B16.10, ASME B16.25, JIS B2212, GOST 33259, DIN 3202, etc |
| Test Standards | API 598, ISO 5208, BS EN 12266, ASME B16.104, GOST 9544-2015, JIS B2003, DIN 3230, etc |
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