LocationTianjin, China (Mainland)
EmailEmail: sales@likevalves.com
PhonePhone: +86 13920186592

PQ side mounted two way sealed eccentric hemisphere valve

Short Description:

PQ side mounted bi-directional eccentric hemisphere valve is developed on the basis of absorbing and digesting the pair clip type large flow through valve (maxiflu stell ventile) produced by canal company of Germany. Its structure adopts the eccentric clamping principle to achieve the purpose of locking, adjusting and closing through the transmission mechanism. The sealing pair is a metal face ring with hard face contact seal, and the valve core of the double eccentric structure is located in the hidden position when it is opened In the ball chamber, the flow section is large, and the valve is not scoured. When the valve is closed, the valve core is not scoured. When the valve is opened, the spherical surface of the valve core asymptotically moves along the valve seat, which effectively removes the scaling obstacles and realizes reliable sealing. The first feature is that it is particularly effective for the mixed flow transportation of two-phase mixed flow easy to scale solid precipitation; the second feature is that the hemisphere of the valve is made of bimetallic, the base metal is overlaid with different alloys, the valve seat is also overlaid with corresponding surfacing, and the sealing surface is assembled with various types of anti-corrosion, wear-resistant, high-strength, etc., to meet the needs of different occasions; The third feature is tight sealing, conveying harmful gas can reach zero leakage; the fourth feature is that the valve core of the sealing pair has compensation, when the valve seat is worn (the hardness of the valve seat is lower than that of the valve core), when it is closed, it can still be reliably sealed and the service life is extended. In addition, the valve seat can still be used after adjusting or replacing by screwing off the compression nut, which avoids the defect that the sealing of many existing valves is invalid and the whole valve is scrapped. Therefore, the selection of different alloy (or combination ball) bimetallic sealing pairs can be used in different industrial fields, such as wear resistance, corrosion resistance, high temperature resistance and strict sealing.


Product Detail

OEM/ODM Service

Product Tags

Application of PQ side mounted two way sealed eccentric hemisphere valve

It is suitable for sewage treatment, pulp, alumina, urban heating, petrochemical, gas, slurry, coal ash, etc.

Product features

1. Large circulation area and small flow resistance. This is because after opening, the valve core is located in the ball chamber, and the fluid is straight through.

2. Small operating torque, turn 90 degrees to open and close, easy to operate.

3. Tight seal; double eccentric metal hard seal. The structure does not affect the opening and closing, which is the most significant feature of hemisphere valve.

4. Long service life, wear-resistant sealing pair, with compensation, valve seat can be adjusted or replaced.

 

Executive standard for PQ side mounted bidirectional eccentric hemisphere valve

 

Design criteria Structural length Flange standard Test and inspection
GB/T 12237-2007 GB/T 12221-2005 GB-T9113-2000EN1092 GB/T13927-2008API598

 

Main technical parameters

 

Nominal pressure PN(MPa) 0.6 1.0 1.6 2.5 4.0 6.4
Maximum working pressure at normal temperatureMPa 0.6 1.0 1.6 2.5 4.0 6.4
Shell strength test pressureMPa 0.9 1.5 2.4 3.8 6.0 9.6
Airtight test pressureMPa 0.6 0.6 0.6 0.6 0.6 0.6
High pressure seal test pressureMPa 0.66 1.1 1.8 2.75 4.4 7.1
Leakage rate < 0.1*DNmm/S (in accordance with API 598)
Applicable temperature () Soft seal-40~+200
Applicable medium Natural gas, steam, oil products, acids, alkalis, pulverized coal, coal ash, waste residue and mudIncluding granular, fiber and other media
Transmission form Worm gear drive, electric drive, pneumatic drive, hydraulic drive

PQ Materials of main parts of side mounted two way eccentric hemisphere valve

Valve body and pressure plate WCB ZG1Cr18Ni9Ti ZG0Cr18Ni12Mo2Ti ZG15Cr1Mo1V
sphere WCB+Cr 1Cr18Ni9TiSpecial surface treatment 0Cr18Ni12Mo2TiSpecial surface treatment 25Cr2Mo1VSpecial surface treatment
Stem 20Cr13 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti 25Cr12Mo1V
valve seat Q235A+PTFEButt welding 1Cr18Ni9Ti/PTFE 0Cr18Ni12Mo2Ti/PTFE 25Cr12Mo1/PTFE
filler Flexible graphite Flexible graphite Flexible graphite Flexible graphite
Bolt 35 0Cr18Ni9 0Cr18Ni9 15Cr1Mo1V
Nut 45 0Cr18Ni9 0Cr18Ni9 20CrMo

PQ Drawing of side mounted two way seal eccentric hemisphere valvePQװʽ˫ܷƫİͼֽ

PQ Main connecting dimensions of PN1.0MPa side mounted two way seal eccentric hemisphere valve

DN L D D1 D2 Z-d0 f b H
40 165 150 110 84 4-18 2 18 210
50 178 165 125 99 4-18 2 20 230
65 190 185 145 118 4-18 2 20 245
80 203 200 160 132 8-18 2 20 265
100 229 220 180 156 8-18 2 22 310
125 254 250 210 184 8-18 2 22 350
150 267 285 240 211 8-22 2 24 395
200 292 340 295 266 8-22 2 24 435
250 330 395 350 319 12-22 2 26 480
300 356 445 400 370 12-22 2 26 550
350 381 505 460 429 16-22 2 26 620
400 430 565 515 480 16-26 2 26 670
450 502 615 565 530 20-26 2 28 700
500 550 670 620 582 20-26 2 28 760
600 660 780 725 682 20-30 2 34 850
700 770 895 840 794 24-30 5 34 920
800 880 1015 950 901 24-33 5 36 1100
900 1000 1115 1050 1001 28-33 5 38 1300
1000 1100 1230 1160 1112 28-36 5 38 1600
1200 1200 1455 1380 1328 32-39 5 44 1950

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ball-valve

Eccentric-Semi-ball-valve_01

 

ball-valve

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-2_12

 

 


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