Two-piece floating ball valve is a special type of valve, its structural form is mainly composed of two parts, so it is called "two-piece". The main feature of this valve is that the ball is floating, when the medium pressure on the ball, the ball can produce a certain displacement and tightly pressed on the sealing surface of the outlet end, so as to ensure the sealing of the outlet end.
2 PCS Floating ball Specification
|
Service |
Oil, Natural gas, Water and Chemical Transmission Pipeline application, metal to metal sealing can be used for some abrasive medium. |
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Design Body |
Two pieces body |
|
Bore |
Reduce bore or full bore |
|
Bonnet Design |
End entry |
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Ball Design |
Floating mounted ball |
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DBB/DIB Design |
Not applicable |
|
Size |
1/2"-8" |
|
Pressure |
150Lb-2500Lb |
|
Design temperature |
-46-200℃ |
|
Main materials |
CS/SS/Duplex stainless steel/Bronze/Inconel/Titanium alloy steel |
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Seat sealing type |
PTFE/RPTFE/Nylon/Devlon/PEEK/Hard sealing |
|
Operation |
Manual, Electric, Pneumatic, Gas over oil, Electro-hydraulic actuator.(Rotork, Biffi, DVG, ect.) |
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Design Standard |
API608/API6D/AWWA/BS5351/ISO17292/DIN/GB/GHOST |
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Face to face |
ASME B16.10/ API6D/DIN |
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Ends |
RF/RTJ as ASME B16.5, BW to ASME B16.25, SW to ASME B16.11, Thread ends to ASME B1.20.1 |
|
Pressure and Temperature Design |
ASME B16.34 |
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Test standard |
API6D/API598, ISO5208 |
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Fire safe |
APIF6A/API607 |
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Others |
Anti static design, Anti blow-out stem design, NACE MR0175/ISO15156(if applicable) |
2 Piece Ball Valve
The structural characteristics of two-piece ball valve:
1. opening and closing without friction. This feature completely solves the traditional valve because the sealing surface friction between each other and affect the sealing problem.
2. top-loading structure. The valve installed in the pipeline can be directly online inspection and maintenance, can effectively reduce the device stop, reduce costs.
3. Single-seat design. Eliminate the problem that the medium in the cavity of the valve affects the safety of use due to abnormal pressurization.
4. Low torque design. Special structural design of the valve stem, just with a small handgrip valve can be easily opened and closed.
5. wedge seal structure. The valve is relying on the mechanical force provided by the valve stem, the ball wedge pressure to the valve seat and sealing, so that the sealing of the valve is not subject to changes in pipeline differential pressure, in a variety of operating conditions, the sealing performance are reliably guaranteed.
6. Self-cleaning structure of sealing surface. When the ball is tilted away from the valve seat, the fluid in the pipeline along the sealing surface of the ball into a 360 ° uniform through, not only eliminates the high-speed fluid on the seat of the local scouring, but also flushed away the sealing surface of the accumulation of material, to achieve the self-cleaning purpose.
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