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American standard cast steel gate 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 gate valve is the control component in the fluid conveying system, with the functions of cut-off, regulation, diversion, prevention of reverse flow, pressure stabilization, diversion or overflow pressure relief, etc. Valves for fluid control systems, from the simplest American standard stop valve to various American standard valves used in extremely complex automatic control systems, have many varieties and specifications. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals and radioactive media.

◆Product features

1, product design and manufacturing in line with foreign advanced standards, reliable sealing, excellent performance;
2. The structure design is compact and reasonable, and the appearance is beautiful;
3, the use of wedge type elastic gate structure, medium and large diameter set of rolling bearings, open and close easily;
4, the valve body material varieties, packing, gasket according to the actual conditions or user requirements reasonable selection, can be applied to a variety of pressure, temperature and medium conditions.


◆ Executive standards

design and manufacture Structure length Connecting flange Butt welding connection size Pressure-Temperature TEST AND INSPECTION
API 600 → API 6D ANSI B16.10 ASME B16.5/B16.47 ANSI B16.25 ANSI B16.34 API 598 → API 6D

 

◆ 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 64.0 9367 46.8 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






NBR/FPM Flexible Graphite
reinforced flexible graphite
SFB/260
SFP/260
PTFE



≤ 425 Water, steam, oil
WC1

38CrMoAl

25Cr2Mov

≤ 450
WC6 ≤ 540
WC9 ≤ 570
C5 C12 ≤ 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 2 178 150 120.7 92.1 14.3-2 4-19 310 200
2-1/2 190 180 139.7 104.8 15.9-2 4-19 380 220
3 203 190 152.4 127 17.5-2 4-19 412 240
4 229 230 190.5 157.2 22.3-2 8-19 471 280
5 254 255 215.9 185.7 22.3-2 8-22 516 300
6 267 280 241.3 215.9 23.9-2 8-22 588 300
8 292 345 298.5 269.9 27-2 8-22 741 350
10 330 405 362 323.8 28.6-2 12-25 903 400
12 356 485 431.8 381 30.2-2 12-25 1054 500
14 381 535 476.3 412.8 33.4-2 12-29 1295 600
16 406 595 539.8 469.9 35-2 16-29 1435 600
18 432 635 577.9 533.4 38.1-2 16-32 1626 650
20 457 700 635 584.2 41.3-2 20-32 1859 650
Class 300Lb 2 216 165 127 92.1 20.7-2 8-19 353 250
2-1/2 241 190 149.2 104.8 23.9-2 8-22.5 377 250
3 282 210 168.3 127 27-2 8-22.5 397 300
4 305 255 200 157.2 30.2-2 8-22.5 482 300
5 381 280 235 185.7 33.4-2 8-22.5 568 350
6 403 320 269.9 215.9 35-2 12-22.5 625 350
8 419 380 330.2 269.9 39.7-2 12-25.5 776 400
10 457 445 387.4 323.8 46.1-2 16-29 958 500
12 502 520 450.8 381 49.3-2 16-32 1135 600
14 762 585 514.4 412.8 52.4-2 20-32 1205 600
16 838 650 571.5 469.9 55.6-2 20-35 1367 650

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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