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American standard cast steel 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.

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Cast steel valve series

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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 cast steel globe valve is suitable for Class150 ~ 2500LB, working temperature ≤ 600 ℃ petroleum, chemical, thermal power station and other working conditions of the pipeline, cut off or connected to the pipeline medium.

◆Product features

1. The product is designed and manufactured according to ASME B16.34 and API623 standards, with reasonable structure, reliable sealing, excellent performance and beautiful appearance;
2, the sealing surface surfacing Co-based hard alloy, wear resistance, corrosion resistance, anti-scratch performance is good, long service life;
3. The valve stem has good corrosion resistance and abrasion resistance after tempering and surface nitriding treatment;
4. The pressure ≥ Class1500 cavity adopts self-tightening sealing structure, and the sealing performance increases with the increase of internal pressure, which ensures the reliability of sealing;
5. The valve is equipped with an inverted sealing structure, which is reliable in sealing;
6. The material of the parts and the size of the flange butt welding end can be reasonably selected according to the actual working conditions or user requirements to meet various engineering needs.




◆ Executive standards

Product Specification Design Specification Structure length Connecting flange TEST 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 seal test Gas seal 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

 

◆ Main parts materials

Body/Bonnet/Disc Stem Sealing surface Gasket (ring) Packing Working temperature (℃) Applicable media
WCB 20Cr13 13Cr
STL
Body Material
PTFE
Nylon



reinforced flexible graphite
13Cr/Flexible Graphite
SFB-2
08 mild steel
F304
F316
F304L
F316L






flexible graphite
reinforced flexible graphite
SFB/260
SFP/260
PTFE



≤ 425 Water, steam and oil
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 outline connection dimension

Pound Class NPS L D D1 D2 b-f Z-Fd 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: The flange size in this table is in accordance with ASME B16.5/B16.47 standard, and the structure length is in accordance with ASME B16.10.

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