Stainless 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.
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
The stainless steel gate valve is suitable for the pipeline of various systems of petroleum, chemical, hydraulic and thermal power stations with nominal pressure PN1.6 ~ 2.5MPa and working temperature <-29 ℃ ~ 550 ℃ to cut off or connect the pipeline medium. Applicable medium: water, oil, steam, and acid, alkali, ammonia, urea, sulfur-containing natural gas, etc.
◆Product features
1, compact structure, reasonable design, good valve rigidity, smooth channel, small flow coefficient;
2, the sealing surface is made of stainless steel and hard alloy, long service life;
3. Flexible graphite packing, reliable sealing, light and flexible operation;
4. The driving mode is manual, pneumatic, electric, gear transmission, hydraulic;
5. The structure form is elastic wedge type single ram, rigid wedge type single ram double ram type.
◆ Main technical specifications
| Design Criteria | GB/T12234 | |||
| 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 | PN 4.0 | |
| Test pressure (MPa) | Shell test | 2.4 | 3.75 | 6.0 |
| High pressure seal test | 1.8 | 2.8 | 4.4 | |
| 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) | |||
◆ Material of main parts
| Part Name | Material | Part Name | Material |
| Valve body | CF8/CF8M | Packing | flexible graphite |
| Ram | CF8/CF8M | Packing sleeve | A182F304/F316 |
| Stem | A182 F304/F316 | Packing gland | CF8/CF8M |
| Bolt | A193 B8 | Swing bolt | A193 B8 |
| Nut | A1948 | Stem Nut | ZCuAl10Fe3 |
| Gasket | Flexible graphite stainless steel | Handwheel | KTH300-08 |
| Bonnet | CF8/CF8M | Lock nut | ASTM A105 |
◆ Main outline connection dimension
| Nominal pressure PN | DN(mm) | L | D | D1 | D2 | b-f | Z-fd | H |
| PN1.6MPa | 50 | 250 | 165 | 125 | 102 | 18-3 | 4-F18 | 350 |
| 65 | 270 | 185 | 145 | 122 | 18-3 | 8-F18 | 370 | |
| 80 | 280 | 200 | 160 | 138 | 20-3 | 8-F18 | 390 | |
| 100 | 300 | 220 | 180 | 158 | 20-3 | 8-F18 | 435 | |
| 125 | 325 | 250 | 210 | 188 | 22-3 | 8-F18 | 520 | |
| 150 | 350 | 285 | 240 | 212 | 22-3 | 8-F22 | 610 | |
| 200 | 400 | 340 | 295 | 268 | 24-3 | 12-F22 | 785 | |
| 250 | 450 | 405 | 355 | 320 | 26-3 | 12-F26 | 960 | |
| 300 | 500 | 460 | 410 | 378 | 28-4 | 12-F26 | 1080 | |
| 350 | 550 | 520 | 470 | 438 | 30-4 | 16-F26 | 1200 | |
| 400 | 600 | 580 | 525 | 490 | 32-4 | 16-F30 | 1400 | |
| 450 | 650 | 640 | 585 | 550 | 40-4 | 20-F30 | 1500 | |
| 500 | 700 | 715 | 650 | 310 | 44-4 | 20-F33 | 1630 | |
| 600 | 800 | 840 | 770 | 725 | 54-5 | 20-F36 | 1830 | |
| PN2.5MPa | 50 | 250 | 165 | 125 | 102 | 20-3 | 4-F18 | 350 |
| 65 | 270 | 185 | 145 | 122 | 22-3 | 8-F18 | 370 | |
| 80 | 280 | 200 | 160 | 138 | 24-3 | 8-F18 | 390 | |
| 100 | 300 | 235 | 190 | 162 | 24-3 | 8-F22 | 435 | |
| 125 | 325 | 270 | 220 | 188 | 26-3 | 8-F26 | 520 | |
| 150 | 350 | 300 | 250 | 218 | 28-3 | 8-F26 | 610 | |
| 200 | 400 | 360 | 310 | 278 | 30-3 | 12-F26 | 785 | |
| 250 | 450 | 425 | 370 | 335 | 32-3 | 12-F30 | 930 | |
| 300 | 500 | 485 | 430 | 395 | 34-4 | 16F30 | 1080 | |
| 350 | 550 | 555 | 490 | 450 | 38-4 | 16-F33 | 1250 | |
| 400 | 600 | 620 | 550 | 505 | 40-4 | 16-F36 | 1430 |
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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