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Syphons
If there were only one kind of rotating cylinder and only one set of operating conditions, choosing the right syphon system would be a simple matter. But that’s not the case. In order to end up with the most effective syphon system, a great deal of care must be taken to ensure an efficient and reliable syphon system is selected. Operating conditions such as machine speed, steam pressure, condensing loads, blow-through steam, and other parameters all have an effect on syphon selection.
| Syphon Design | Type | Rotational Speed | ||||
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| < 150 mpm < 30 RPM |
150-299 mpm 30-59 RPM |
300-749 mpm 60-159 RPM |
750-1200 mpm 160-250 RPM |
>1200 mpm >250 RPM |
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| Pivot Body™ Syphon Elbow | Stationary |  |
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| Spring-Lock Syphon Elbow | Stationary | |
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| 45° Locking Elbow | Stationary | |
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| Internal Supported Syphon | Stationary | |
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| Cantilever Syphon | Stationary | |
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| Rotary Scoop Syphon | Rotary | |
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| Rotocurve Syphon | Rotary | |
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| Conventional Rotary Syphon | Rotary | |
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Recommended
Acceptable
Not Recommended
Stationary Syphons |
Rotary Syphons |
| Stationary syphons are fixed in place and do not rotate with the cylinder. Because stationary syphons do not rotate, they are not subject to centrifugal forces and operating differential pressure requirements do not increase with rotational speed. Stationary syphons are available for slow, medium, and high speed applications. | Rotary syphons are fixed to the inside of the cylinder and rotate with the cylinder. Because the rotary syphon moves with the rotating cylinder, it can be placed closer to the cylinder shell thereby reducing the level of condensate inside the cylinder. Rotating syphons are available for slow, medium, and high speed applications. |
