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Eccentric half ball valve
Eccentric half ball valve draws the advantages of butterfly valve, ball valve, has the advantages of large circulation capacity, strong adaptability to the medium, high temperature resistance, quick opening and closing
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Application
Eccentric half ball valve draws the advantages of butterfly valve, ball valve, has the advantages of large circulation capacity, strong adaptability to the medium, high temperature resistance, quick opening and closing. It is widely used in thermal power generation, metallurgy, electric power, chemical industry, environmental protection and other industries in a variety of pipelines, which can be used for medium opening and closing and adjustment.
Characteristic
• Under the action of the eccentric valve in the closing, the eccentric ball and seat more close more tight, fully achieve good sealing purpose; Hemispherical cut between the ball and the seat with shear and squeeze cutting effect, can effectively remove the sealing surface of scaling or dirt, reliable sealing, long service life;
• Under the action of eccentric when the valve is opened, the ball and the seat are completely separated, without any contact, the ball and the seat will not produce friction, very effective to overcome the sealing surface always friction problem;
• The sealing surface is wear-resistant, the seat and the ball have compensation allowance, when the seat is worn, it can still be sealed reliably, prolong the service life;
• Valve seat design and valve body design with the structure, very effective to prevent the ball and valve seat blocking, valve seat out of the phenomenon;
• Large circulation area without flow resistance: this is because the ball is hidden in the valve chamber after opening, no flow resistance DC channel, the flow channel is smooth and will not appear ash or stuck phenomenon, the pressure loss is small, the medium will not be deposited in the valve chamber;
• Due to the principle of eccentricity, the ball is completely separated from the seat when opening, without any contact, small opening and closing torque, 90 degrees can be completed opening and closing, easy operation;
• Valves are generally connected with flanged or butt welded;
• The valve is driven by worm gear and worm drive, manual, pneumatic or electric.
Design Guides
| Design and manufacture | Structure length | Flange connection size | Inspection and test | Pressure and temperature reference |
| GB/T 26146 | GB/T 12221 | GB/T9124.1、GB/T9124.2 JB/T79 | GB/T 26480 | GB/T 12224 |
| NB/T47044 | GB/T 12221 | NB/T47044 | NB/T47044 | |
| ASME B16.34 | ASME B16.10 | ASME B16.5 | ASME B16.34 | ASME B16.34 |
Product Range
| Nominal pressure | PN2.5、PN6、PN10、PN16、PN25 | |
| Nominal size | DN40～DN200 | |
| Body matenal | WCB、CF8、CF3、CF8M、CF3M | |
| Test pressure(MPa) | Strength test (Water pressure) | 1.5×P(38℃ pressure rating) |
| Sealing test (Water pressure) | 1.1×P(38℃ pressure rating) | |
| Applicable Temperature | -29℃～570℃ | |
| Applicable medium | Water, steam, oil, weak corrosive media, etc | |
Note：
1、The valve beyond the above specifications can be customized according to user requirements;
2、The applicable temperature range of each valve shall be subject to the actual pressure bearing material of the valve.