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Q340H/Y/F Q640H/Y/F eccentric hemisphere valve

Q340H/Y/F Q640H/Y/F eccentric hemisphere valve

Valve purpose: Eccentric hemisphere valve, also known as C-type ball valve, is to make the valve unblocked or blocked by rotating the hemisphere. The switch is light and small in size. It can be made into a large diameter. It has reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are often closed and are not easy to be eroded by media. It is widely used in petroleum, chemical industry, urban water supply and drainage, etc. Valve models: upper eccentric hemisphere valve series models include DYQ340H, DYQ340Y and DYQ340F; side eccentric hemisphere valve series models include PQ640H, PQ640Y and PY640F.

  • Item NO.:

    XUVAL77-19
  • Lead Time:

    45Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • Color:

    silvery,blue
  • MOQ:

    10
Products Details

Q340H/Y/F Q640H/Y/F eccentric hemisphere valve

Valve purpose:

Eccentric hemisphere valve, also known as C-type ball valve, is to make the valve unblocked or blocked by rotating the hemisphere. The switch is light and small in size. It can be made into a large diameter. It has reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are often closed and are not easy to be eroded by media. It is widely used in petroleum, chemical industry, urban water supply and drainage, etc.

Valve models: upper eccentric hemisphere valve series models include DYQ340H, DYQ340Y and DYQ340F; side eccentric hemisphere valve series models include PQ640H, PQ640Y and PY640F.


Valve features:

1. The fluid resistance of eccentric hemisphere valve is small, and its resistance coefficient is equal to that of pipe section with the same length;
2. Simple structure, small volume and light weight;
3. It is tight and reliable. At present, the sealing surface material of ball valve is widely made of plastic with good sealing performance, and it has been widely used in vacuum system;
4. Eccentric structure design, when the valve is opened, it can quickly break away from the valve seat, reduce friction and improve service life;
5. Easy maintenance, simple structure of ball valve, movable sealing ring, easy disassembly and replacement;
6. When the eccentric hemispherical valve is fully open or closed, the sealing surface of the ball and valve seat is isolated from the medium, and the erosion of the valve sealing surface will not be caused when the medium passes through;
7. Wide range of application, diameter from small to several millimeters, to several meters, from high vacuum to high pressure can be applied.


Executive standard:

Design specification: API 6D API 608 BS 5351 GB / t12237
Structure length: ASME B16.10 GB / t12221
Flange connection: ASME B16.5 GB / t9113
Test and inspection: GB / T 13927 API 598 API 6D


Performance parameters:

Working pressure(MPa) 1.6~10.0 (Calss150-Calss600)
Calibermm) DN15-DN1200 1/2″-48″
Applicable medium Other media such as water, oil, gas, acetic acid, nitric acid, etc
Material  Valve body WCB CF8 CF8M CF3 CF3M
Sphere WCB CF8 CF8M CF3 CF3M
Stem 2Cr13 F304 F316 F304L F316L
Sealing surface PTFE RPTFE PEEK 
Filler Flexible graphite

Structure diagram:

Note: 1 for valve body, 2 for compression ring. 3 represents sleeve, 4 represents seat, 5 represents ball crown, 6 represents bonnet, 7 represents packing and 8 represents eccentric shaft.


Main dimensions:

Overall dimension of eccentric hemisphere valve under 1.6Mpa nominal pressure:

DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L 178 190 203 229 254 267 292 330 356 381 406 432 457 509
H 242 269 292 330 345 370 405 480 520 570 630 695 740 860
D 165 185 200 220 250 285 340 405 460 520 580 640 715 840
D1 125 145 160 180 210 240 295 355 410 470 525 585 650 770
D2 99 118 132 156 184 211 266 319 370 429 480 54 609 720
C 20 20 20 22 22 24 24 26 28 30 32 34 36 38

Overall dimension of eccentric hemisphere valve under 2.5MPa nominal pressure:

DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L 178 190 203 229 254 267 292 330 356 381 406 432 457 508
H 242 269 292 330 345 370 405 480 520 570 630 695 740 860
D 165 185 200 235 270 300 360 425 485 555 620 670 730 845
D1 125 145 160 190 220 250 310 370 430 490 550 600 660 770
D2 99 118 132 156 184 211 274 330 389 448 503 548 609 720
C 20 22 24 24 26 28 30 32 34 38 40 42 44 46


Packing & Delivery : 

Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below
Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not
enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.


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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.