GB flange globe valve
A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.
Key words:
Classification:
Stainless steel valve series
Description
A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.
◆ Product use
National standard flange stop valve is suitable for nominal pressure PN1.6 ~ 2.5MPa, working temperature -29-550 ℃ of petroleum, chemical, pharmaceutical, fertilizer, power industry and other working conditions of the pipeline, cut off or connected to the pipeline medium.
◆Product features
1, the product structure is reasonable, reliable sealing, excellent performance, beautiful appearance;
2, sealing surface surfacing Co-based hard alloy, corrosion resistance, good anti-injury performance, long service life;
3. The valve stem has good corrosion resistance and abrasion resistance after tempering and surface nitriding treatment;
4. The valve is equipped with an inverted sealing structure, which is reliable in sealing;
5. The material and flange size of the parts can be reasonably selected according to the actual working conditions or user requirements to meet the needs of various projects.
◆Main technical parameters
| Design Criteria | GB/T12235 | ||
| Pressure-Temperature Rating | GB/T12224 | ||
| Structure length | GB/T12221 | ||
| Flange connection size | JB/T 79、GB/T9113、HG/T20592 | ||
| Welding end connection | GB/T12224 | ||
| Inspection and test | JB/T9092、GB/T13927、GB/T26480 | ||
| Nominal pressure (MPa) | PN1.6 | PN2.5 | PN4.0 |
| Shell test | 1.5 | 2.4 | 3.75 |
| High pressure seal test | 1.1 | 1.76 | 2.75 |
| Test pressure (MPa) Low pressure gas seal test |
0.6 | 0.6 | 0.6 |
| Upper seal test | 0.6 | 0.6 | 0.6 |
| Applicable temperature | -29 ℃ ~ 550 ℃ (different materials for different working conditions) | ||
| Applicable media | Water, oil, steam and all kinds of corrosive media (different media use different materials) | ||
◆ Main parts materials
| Part Name | Material | Part Name | Material |
| Valve body | CF8/CF8M | Packing | Graphite |
| Disc | 304, 316 | Pin shaft | 304 |
| Disc Nut | 304, 316 | Packing gland | CF8/CF8M |
| Stop washer | 304, 316 | Swing bolt | A193 B8、B8M |
| Stem | 304, 316 | Nut | A1948、8M |
| Middle flange gasket | 304/316 Graphite | Bolt | A193 B8、B8M |
| Bonnet | CF8/CF8M | Handwheel | KTH300-06 |
◆ Main outline connection dimension
| Nominal pressure PN | DN(mm) | L | D | D1 | D2 | b | f | Z-Fd | H | D0 |
| PN1.6MPa | 50 | 230 | 165 | 125 | 102 | 18 | 3 | 4-F18 | 350 | 240 |
| 65 | 290 | 185 | 145 | 122 | 18 | 3 | 8-F18 | 355 | 280 | |
| 80 | 310 | 200 | 160 | 138 | 20 | 3 | 8-F18 | 400 | 280 | |
| 100 | 350 | 220 | 180 | 158 | 20 | 3 | 8-F18 | 415 | 320 | |
| 125 | 400 | 250 | 210 | 188 | 22 | 3 | 8-F18 | 460 | 360 | |
| 150 | 480 | 285 | 240 | 212 | 22 | 3 | 8-F22 | 510 | 400 | |
| 200 | 600 | 340 | 295 | 268 | 24 | 3 | 12-F22 | 710 | 400 | |
| 250 | 730 | 405 | 355 | 320 | 26 | 3 | 12-F26 | 789 | 450 | |
| 300 | 850 | 460 | 410 | 378 | 28 | 4 | 12-F26 | 925 | 500 | |
| PN2.5MPa | 50 | 230 | 165 | 125 | 102 | 20 | 3 | 4-F18 | 350 | 240 |
| 65 | 290 | 185 | 145 | 122 | 22 | 3 | 8-F18 | 400 | 280 | |
| 80 | 310 | 200 | 160 | 138 | 24 | 3 | 8-F18 | 355 | 280 | |
| 100 | 350 | 235 | 190 | 162 | 24 | 3 | 8-F22 | 415 | 320 | |
| 125 | 400 | 270 | 220 | 188 | 26 | 3 | 8-F26 | 460 | 360 | |
| 150 | 480 | 300 | 250 | 218 | 28 | 3 | 8-F26 | 510 | 400 | |
| 200 | 600 | 360 | 310 | 278 | 30 | 3 | 12-F26 | 710 | 400 | |
| 250 | 730 | 425 | 370 | 335 | 32 | 3 | 12-F30 | 789 | 450 | |
| 300 | 850 | 485 | 430 | 395 | 34 | 4 | 16-F30 | 925 | 500 |
Note: The flange size in this table is in accordance with GB/T 9113-2010, and the structure length is in accordance with GB/T 12221-2005.
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