American-standard shut-off 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:
Cast 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 Overview
American‑standard globe valves are suitable for pipelines in various service conditions—such as petroleum, chemical, and thermal power plant applications—with pressure classes ranging from Class 150 to 2500 lb and operating temperatures up to 600°C, enabling the shut‑off or isolation of pipeline media.
◆Product Features
1. The product is designed and manufactured in accordance with ASME B16.34 and API 623 standards, featuring a rational structure, reliable sealing, excellent performance, and an aesthetically pleasing appearance.
2. The sealing surface is overlay-welded with a cobalt-based hard alloy, offering excellent wear resistance, corrosion resistance, and scuff‑resistance, resulting in a long service life.
3. The valve stem undergoes quenching and tempering followed by surface nitriding, providing excellent corrosion resistance and wear resistance.
4. For pressures ≥ Class 1500, the valve body employs a self‑tightening sealing structure; the sealing performance improves as the internal pressure increases, ensuring reliable sealing. 5. The valve is equipped with a back‑seal design, providing dependable sealing.
6. The material of the components and the dimensions of the flange‑to‑welded ends can be appropriately selected based on actual operating conditions or user requirements, thereby meeting a wide range of engineering needs.
◆Implementation Standard
| Product Specification | Design Specifications | Structural length | Connection flange | Testing and Inspection | Pressure-Temperature |
| API 623 | ASME B16.10 | ASME B16.5/B16.47 | API 598 | ASME B16.34 |
◆Main Performance Specifications
| Nominal Pressure (Lb) | Strength test | Water-tightness test | Air-tightness test | |||
| MPa | Lbf/in² | MPa | Lbf/in² | MPa | Lbf/in² | |
| 150 | 3.1 | 450 | 2.2 | 315 | 0.5~0.7 | 60~100 |
| 300 | 7.8 | 1125 | 5.6 | 815 | ||
| 600 | 15.3 | 2225 | 11.2 | 1630 | ||
| 900 | 23.1 | 3350 | 16.8 | 2440 | ||
| 1500 | 38.4 | 5575 | 28.1 | 4080 | ||
| 2500 | 64.6 | 9367 | 47.4 | 6873 | ||
◆Materials of Main Components
| Valve Body/Valve Bonnet/Valve Disc | Valve stem | Sealing surface | Gasket (Ring) | Filler | Operating Temperature (°C) | Applicable medium |
| WCB | 20Cr13 | 13Cr STL Base material PTFE Nylon |
Enhanced Flexible Graphite 13Cr/Flexible Graphite SFB-2 08 Mild Steel F304 F316 F304L F316L |
Flexible graphite Enhanced Flexible Graphite SFB/260 SFP/260 PTFE |
≤425 | Water, steam, and petroleum products |
| WC1 | 38CrMoAl 25Cr2Mov |
≤450 | ||||
| WC6 | ≤540 | |||||
| WC9 | ≤570 | |||||
| C5C12 | ≤540 | |||||
| CF8 | F304 | ≤600 | Nitric acid, acetic acid, urea | |||
| CF3 | F316 | |||||
| CF8M | F304L | |||||
| CF3M | F316L |
◆Main External Connection Dimensions
| Pound class | NPS | L | D | D1 | D2 | b-f | Z-Фd | H | D0 |
| Class 150Lb | 2 | 203 | 150 | 120.7 | 92.1 | 14.3-2 | 4-19 | 350 | 220 |
| 2-1/2 | 216 | 180 | 139.7 | 104.8 | 15.9-2 | 4-19 | 370 | 240 | |
| 3 | 241 | 190 | 152.4 | 127 | 17.5-2 | 4-19 | 385 | 280 | |
| 4 | 292 | 230 | 190.5 | 157.2 | 22.3-2 | 8-19 | 454 | 280 | |
| 5 | 356 | 255 | 215.9 | 185.7 | 22.3-2 | 8-22 | 472 | 350 | |
| 6 | 406 | 280 | 241.3 | 215.9 | 23.9-2 | 8-22 | 541 | 350 | |
| 8 | 495 | 345 | 298.5 | 269.9 | 27-2 | 8-22 | 590 | 450 | |
| 10 | 622 | 405 | 362 | 323.8 | 28.6-2 | 12-25 | 780 | 500 | |
| 12 | 698 | 485 | 431.8 | 381 | 30.2-2 | 12-25 | 870 | 550 | |
| 14 | 787 | 535 | 476.3 | 412.8 | 33.4-2 | 12-29 | 900 | 600 | |
| 16 | 914 | 595 | 539.8 | 469.9 | 35-2 | 16-29 | 1250 | 600 | |
| Class 300Lb | 2 | 267 | 165 | 127 | 92.1 | 20.7-2 | 8-19 | 345 | 240 |
| 2-1/2 | 292 | 190 | 149.2 | 104.8 | 23.9-2 | 8-22.5 | 377 | 280 | |
| 3 | 318 | 210 | 168.3 | 127 | 27-2 | 8-22.5 | 464 | 280 | |
| 4 | 356 | 255 | 200 | 157.2 | 30.2-2 | 8-22.5 | 490 | 350 | |
| 5 | 400 | 280 | 235 | 185.7 | 33.4-2 | 8-22.5 | 614 | 400 | |
| 6 | 444 | 320 | 269.9 | 215.9 | 35-2 | 12-22.5 | 700 | 450 | |
| 8 | 559 | 380 | 330.2 | 269.9 | 39.7-2 | 12-25.5 | 777 | 500 | |
| 10 | 622 | 445 | 387.4 | 323.8 | 46.1-2 | 16-29 | 935 | 450 | |
| 12 | 711 | 520 | 450.8 | 381 | 49.3-2 | 16-32 | 997 | 500 | |
| 14 | 838 | 585 | 514.4 | 412.8 | 52.4-2 | 20-32 | 1058 | 600 | |
| 16 | 864 | 650 | 571.5 | 469.9 | 55.6-2 | 20-35 | 1320 | 600 | |
| 18 | 978 | 710 | 628.6 | 533.4 | 58.8-2 | 24-35 | 1420 | 700 | |
| 20 | 1016 | 775 | 685.8 | 584.2 | 62-2 | 24-35 | 1510 | 800 |
Note: Flange dimensions in this table comply with ASME B16.5/B16.47, and the overall length is in accordance with ASME B16.10.
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