Q340H/Y/F type eccentric hemispherical valve
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Product Introduction
【Product features】
1. Its structure adopts the principle of eccentric tightening to achieve the purpose of tightening, adjusting, and closing through the transmission mechanism. The sealing pair is a metal surface ring with a hard surface contact seal. When the double eccentric structure is opened, the valve core is located in the ball chamber, the flow cross-section is large, and the valve is not washed away. When it is closed, the valve core is not washed away. When it is opened, the spherical surface of the valve core is gradually along the valve seat, effectively removing fouling obstacles and achieving reliable sealing.It is particularly effective for the transportation of mixed streams with two-phase mixed streams that are easy to scale and precipitate solids.
2. Bimetal is used for the hemispheres of the valve. Different alloys are surfaced on the base material, and the valve seat is also surfaced accordingly and specially treated. The sealing surface is combined into various types such as anti-corrosion, wear-resistant, and high strength to meet the needs of different occasions.
3. The seal is tight and the delivery of harmful gases can reach zero leakage.
4. There is a compensation amount left in the valve core of the sealing pair. When the valve is worn out, it will be rotated a little bit when it is closed, which can be reliably sealed and extend the service life.In addition, the user unscrews the compression nut, and the valve seat is still available after adjustment or replacement, avoiding the disadvantages of the entire unit being scrapped after the valve seal fails.
Due to the selection of bimetal sealing pairs of different alloys (or combination balls) for surfacing, they can be used in wear-resistant, corrosion-resistant, high-temperature-resistant and strictly sealed conditions.
1. Universal valve: specification model DN40-1600.Suitable for occasions with strict requirements such as sewage treatment, pulp, urban heating, etc.
2. Special valve for oil and chemical industry: specification DN40-1600.Suitable for crude oil, heavy oil and other types of oil products, weak corrosion in the chemical industry, two-phase mixed flow media
3. Special valve for gas: specification DN40-1600.Suitable for the transportation control of gas, natural gas, and liquefied petroleum gas
4. Special valve for slurry: specification DN40－1600.Suitable for industrial pipeline transportation with crystallization, precipitation or fouling of chemical reactions in liquid and solid two-phase mixed flow or liquid transportation 5. Special valve for pulverized coal ash: specification DN40－1600.Suitable for the control of power plants, hydraulic slag removal or gaseous pipelines
[Executive standard] Design: GB12237－89 Flange connection: GB/T17241.6-1998, GB/T9115 (steel) structure length: GB12221－89
【Main parts and materials】
| Name | Material |
| Valve body | QT450、WCB、ZG20CrMo、ZG1Cr18Ni9Ti |
| Valve shaft | 2Cr13、1Cr13 |
| Valve disc | Alloy nitrided steel, nitrided stainless steel, wear-resistant steel |
| Valve seat | Alloy nitrided steel, nitrided stainless steel, wear-resistant steel |
| Bearing | Aluminum bronze, FZ-1 composite material |
| Packing | PTFE, flexible graphite |
| Nominal pressure（Mpa） | 0.6 | 1.0 | 1.6 | 2.5 | 4.0 |
| Nominal general classics（mm） | 40－1600 | 40－1600 | 40－1200 | 40－600 | 40－600 |
| Sealing test pressure（Mpa） | 0.66 | 1.1 | 1.76 | 2.75 | 4.4 |
| Shell test pressure（Mpa） | 0.9 | 1.5 | 2.4 | 3.75 | 6.0 |
| Applicable temperature（℃） | －29～300、－29～425、－29～540 | ||||
| Applicable media | Liquids such as clear water, seawater, sewage, acid and alkali, slurry, steam, gas, and oil | ||||
| Drive mode | Manual, electric, pneumatic | ||||
| Connection form | Flange connection, clamp connection | ||||
| Installation method | Vertical installation, horizontal installation | ||||
| Nominal pressure PN/Mpa | Nominal diameter DN/mm | Size（mm） | |||||||
| L | D | K | d | f | C | Z-￠d | H | ||
| 1.6 | 40 | 165 | 150 | 110 | 85 | 3 | 16 | 4-￠18 | |
| 50 | 178 | 165 | 125 | 100 | |||||
| 65 | 190 | 185 | 145 | 120 | 18 | 280 | |||
| 80 | 203 | 200 | 160 | 135 | 20 | 8-￠18 | 320 | ||
| 100 | 229 | 220 | 180 | 155 | 370 | ||||
| 125 | 254 | 250 | 210 | 185 | 22 | 430 | |||
| 150 | 267 | 285 | 240 | 210 | 24 | 8-￠23 | 510 | ||
| 200 | 292 | 340 | 295 | 265 | 26 | 12￠-23 | 600 | ||
| 250 | 330 | 405 | 355 | 320 | 30 | 12-￠26 | 690 | ||
| 300 | 502 | 460 | 410 | 375 | 4 | 760 | |||
| 350 | 572 | 520 | 470 | 435 | 34 | 16-￠26 | 830 | ||
| 400 | 610 | 580 | 525 | 485 | 36 | 16-￠30 | 925 | ||
| 450 | 660 | 640 | 585 | 545 | 40 | 20-￠30 | 1025 | ||
| 500 | 700 | 715 | 650 | 608 | 44 | 20-￠34 | 1120 | ||
| 600 | 813 | 840 | 770 | 718 | 5 | 48 | 20-￠36 | 1210 | |
| EQ340H EQ340Y-10 C （WCB/304/316） | |||||||||
| Nominal pressure PN/Mpa |
Nominal diameter DN/mm |
Size（mm） | |||||||
| L | D | K | d | f | C | Z-￠d | H | ||
| 1.6 | 40 | 165 | 150 | 110 | 85 | 3 | 16 | 4-￠18 | |
| 50 | 178 | 165 | 125 | 100 | |||||
| 65 | 190 | 185 | 145 | 120 | 18 | 280 | |||
| 80 | 203 | 200 | 160 | 135 | 20 | 8-￠18 | 320 | ||
| 100 | 229 | 220 | 180 | 155 | 370 | ||||
| 125 | 254 | 250 | 210 | 185 | 22 | 430 | |||
| 150 | 267 | 285 | 240 | 210 | 24 | 8-￠23 | 510 | ||
| 200 | 292 | 340 | 295 | 265 | 26 | 12￠-23 | 600 | ||
| 250 | 330 | 405 | 355 | 320 | 30 | 12-￠26 | 690 | ||
| 300 | 502 | 460 | 410 | 375 | 4 | 760 | |||
| 350 | 572 | 520 | 470 | 435 | 34 | 16-￠26 | 830 | ||
| 400 | 610 | 580 | 525 | 485 | 36 | 16-￠30 | 925 | ||
| 450 | 660 | 640 | 585 | 545 | 40 | 20-￠30 | 1025 | ||
| 500 | 700 | 715 | 650 | 608 | 44 | 20-￠34 | 1120 | ||
| 600 | 813 | 840 | 770 | 718 | 5 | 48 | 20-￠36 | 1210 | |
Structure picture 
Statement: All text, data, and pictures in this article are only applicable for reference. For details such as valve performance parameters, structure size parameters, and price, please contact us at 010-89283399.
Keywords:
Valve
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