+
  • 焊接式金属硬密封蝶阀1.jpg
  • 焊接式金属硬密封蝶阀2.jpg
  • 焊接式金属硬密封蝶阀3.jpg

Welded metal hard seal butterfly 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

Product Consulting:

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

Welded metal hard seal butterfly valve with three eccentric structure, the valve design in high temperature, high pressure, fire applications is the ideal bubble level seal butterfly valve. Due to the use of welded structure, so the valve and pipeline plane to achieve permanent zero leakage, the welding butterfly valve without flange, the pipeline insulation package has brought great convenience.

◆ Product use

Welded metal hard seal butterfly valve is widely used in heat, petroleum, chemical, electric power, metallurgy, food, medicine, textile, paper and other industries, can be installed in the temperature ≤ 425 ℃, medium for gas, air, steam, water, sea water, oil and other industrial pipe network for regulating flow and cut off the medium.

◆Product features

1, compact structure, small size, light weight, flexible operation, easy to use;
2, the use of three-dimensional eccentric multi-level hard seal structure, its sealing performance is reliable to achieve zero leakage;
3. This valve has no flange, which brings great convenience and beauty to the insulation wrapping of the pipeline;
4. It has the characteristics of high temperature resistance, high pressure, corrosion resistance and wear resistance.


◆ Executive standards

design and manufacture WELDING DIMENSIONS Structure length TEST AND INSPECTION
GB/T12238 JB/T8527 GB/T12224 GB/T12221 GB/T13927、GB/T26480

 

◆Main technical parameters

Nominal diameter DN(mm) 50~700
Nominal pressure PN(MPa) 0.6 1.0 1.6 2.5 4.0
Test pressure (MPa) Strength test 0.9 1.5 2.4 3.75 6.0
Sealing test 0.66 1.1 1.76 2.75 4.4
Gas seal test 0.6 0.6 0.6 0.6 0.6
Applicable media Water, steam, oil, acid corrosion, etc.
Applicable temperature Carbon steel: -29 ℃ ~ 425 ℃ Stainless steel: -40 ℃ ~ 600 ℃

 

◆ Material of main parts

Part Name Materials
Valve body Cast steel, chromium molybdenum steel, alloy steel, dual phase steel
Butterfly plate Cast steel, chromium molybdenum steel, alloy steel, dual phase steel
Valve seat Stainless steel, hardfacing stellite and other hard alloys
Sealing ring Stainless steel and high temperature resistant asbestos board combined into multi-level
Stem 20Cr13, 1Cr13 stainless steel, chromium molybdenum steel, special materials
Shaft sleeve Austenitic stainless steel, 304 nitriding
Packing Flexible graphite, PTFE
Packing gland Cast steel, stainless steel
Bracket Cast steel, stainless steel

 

◆ Main outline connection dimension

Nominal pressure PN0.6MPa Nominal pressure PN1.0MPa
DN Overall dimension WT
(Kg)
Overall dimension WT
(Kg)
mm L D d H H₁ A B L D d H H₁ A B
600 390 636 602 499 1280 570 660 450 390 636 602 499 1280 570 660 465
700 430 726 692 566 1480 750 550 660 430 726 692 566 1480 750 550 680
800 470 826 792 632 1608 750 550 780 470 826 792 632 1608 750 550 810
900 510 926 892 693 1857 750 550 820 510 926 892 693 1857 750 550 860
1000 550 1028 992 757 2038 900 750 1460 550 1028 992 757 2038 900 750 1625
1200 630 1228 1192 851 2237 1000 925 1590 630 1228 1192 851 2237 1000 925 1770
1400 710 1428 1392 876 2411 1000 925 2185 710 1428 1392 876 2411 1000 925 2425
1600 790 1628 1592 1095 2756 1000 925 3210 790 1628 1592 1095 2756 1000 925 3560
1800 870 1828 1792 1214 3093 1100 980 4090 870 1828 1792 1214 3093 1100 980 4545
2000 950 2028 1992 1332 3355 1100 980 5610 950 2028 1992 1332 3355 1100 980 6230

 

◆ Main outline connection dimension

Nominal pressure PN1.6MPa Nominal pressure PN1.6MPa
DN Overall dimension WT
(Kg)
DN Overall dimension WT
(Kg)
mm L D d H H₁ A B mm L D d H H₁ A. B
80 46 90 78 90 356 180 200 27 600 390 636 602 509 1369 570 660 457
100 52 110 96 100 375 180 200 34 700 430 726 692 572 1492 750 550 810
125 56 135 121 113 401 180 200 41 800 470 826 792 638 1622 750 550 1093
150 56 161 146 130 450 270 280 43 900 510 926 892 700 1924 750 550 1410
200 60 222 202 205 545 400 425 81 1000 550 1028 992 765 2054 900 750 1870
250 68 278 254 235 630 400 425 102 1200 630 1228 1192 860 2259 1000 925 2082
300 78 330 303 275 715 450 560 132 1400 710 1428 1392 986 2610 1000 925 2850
350 78 382 351 309 817 450 560 164 1600 790 1628 1592 1106 2856 1000 925 4235
400 102 432 398 346 923 535 580 193 1800 870 1828 1792 1226 3121 1100 980 5346
450 114 484 450 392 1059 535 580 238 2000 950 2028 1992 1345 3385 1100 980 7328
500 127 535 501 427 1126 535 580 302 - - - - - - - - -

Note: The structure length in this table is in accordance with GB/T 12221.

Product inquiry