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Top mounted eccentric hemispherical valve

Top mounted eccentric hemispherical valve

Product Overview: The upper mounted bi-directional sealed eccentric hemispherical valve has been successfully developed by absorbing and digesting advanced technology from both domestic and international sources.The new product is to fix the metal ball crown on an eccentric ball. By rotating the eccentric crankshaft 90 degrees, the word gate is opened and closed, and the Jinxian Lake seat in contact with the metal ball crown cover floats in the axial and longitudinal directions to compensate for the fit between the ball device and the lake seat. This adjustment is applied to industries such as petroleum, chemical, power, and metallurgy. The valve structure adopts the principle of small stem tightening, and the purpose of tightening, adjusting, and closing is achieved through the transmission mechanism. The home seal and ball crown are both metal face rings with hard contact seals. When the double eccentric structure valve is opened, the ball body is hidden in the valve chamber, with a large flow cross-section, and the valve is not flushed, resulting in low flow resistance. When closed, the valve core is not flushed, and when closed, the spherical surface of the valve core gradually moves along the valve seat, with shear function, effectively removing scaling obstacles and achieving reliable sealing. It is particularly effective for conveying media that are prone to scaling. The hemisphere of this valve is fixed with a metal ball crown on an eccentric ball, and different alloy ball crowns are installed on the ball. The valve seat is also made of corresponding alloy and treated with special treatment. The home cover is combined into various categories such as anti-corrosion, magic resistant, and high-temperature resistant. Meet the needs of different occasions. The valve seat and ball crown have a compensation amount, and when the valve seat is worn out, it can still be reliably sealed and its service life can be extended by turning a little more when closed. The biggest feature of this valve is that after the operating device system is depressurized, the valve can be inspected and repaired online. During maintenance, only the valve cover needs to be opened to lift out the ball crown and support body without having to remove the entire valve from the pipeline.

  • Item NO.:

    XUVAL33-279
  • Lead Time:

    50 Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • Color:

    silvery
  • MOQ:

    5
Products Details
Product Usage:

Suitable for systems with strict requirements such as clean water, raw water (including mud and sand), sewage, seawater, distilled water, oil, alumina, coal ash, coal gas, natural gas, urban heating, etc.

Product Performance Specification:

PN(MPa)Nominal pressure 1.0 1.6 2.5 4.0
(MPa)
Room temperature max.working pressure
1.0 1.6 2.5 4.0
(MPa)
Shell strength test pressure
/ / / 4.0
1.5 2.4 3.8
(MPa
Gas seal test pressure
0.6 0.6 0.6 0.6
(MPa)
High pressure seal test
1.1 1.76 2.75 4.4
Leakage rate <0.1×DNmm³/s(API598 Comply with the standard of API 598)
(℃
Applicable temperature
Soft seal:-40℃~+200℃;Hard seal;-50℃~+600℃
Applicable medium Natural gas,steam,oll,acid,alkali,pulverized coal
          fly ash,slag,mud,containing granular,fiber and other kinds of medium
Operation type
Gear,Electric actuator,Pneumatic actuator,Hydraulic actuator



Main External and Connecting Dimensions:

DN L D D1 D2 b f Z-d0 Hw Hd
50 178 165 125 100 18 2 4-18 270 310
65 190 185 145 120 18 2 4-18 280 320
80 203 200 160 135 20 2 4-18 290 330
100 229 220 180 156 22 2 8-18 330 380
125 254 250 210 184 22 2 8-18 345 405
150 267 285 240 211 24 2 8-22 370 440
200 292 340 295 266 24 2 8-22 405 470
250 330 395 350 319 26 2 12-22 480 540
300 356 445 400 370 26 2 12-22 520 580
350 430 505 460 429 26 2 16-22 570 630
400 530 565 515 480 26 2 16-26 630 710
450 580 615 565 530 28 2 20-26 690 770
500 630 670 620 582 / 20-26 740 820
28 2
600 800 780 725 682 34 2 20-30 840 940
700 900 895 840 794 34 5 24-30 960 1040
800 1000 1015 950 901 36 5 24-33 1080 1180
900 1100 1115 1050 1001 38 5 28-33 1190 1280
1000 1200 1230 1160 1112 38 5 28-36 1310 1420
1100 1250 1345 1270 1222 42 5 28-36 1390 1480
1200 1300 1455 1380 1328 44 5 32-39 1420 1530
1400 1500 1675 1590 1530 48 5 36-42 1540 1650
1600 1800 1915 1820 1750 52 5 40-48 1660 1750


Product Execution Standard:

Desian Standard Face-to-Face Flange Standard Test and Inspection
GB/T12237-2007 GB/T12221-2005 GB/T9113-2000 GB/T13927-2008

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    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.