Reliable leakage detection for mechanical seals
To operate properly, every mechanical seal requires a lubricating film between the sliding surfaces. 
This film is formed by the pumping medium itself. Elevated pressure inside the inlet chamber continuously pushes a small amount of lubricant out through the sliding surfaces. Colfax recently introduced a smart leakage detection system for precise monitoring called ALLSEAL.
A coupling bracket captures the standard leakage escaping from the pump. The optoelectronic sensor ALLSEAL with an infrared LED and a light receiver is located in the bracket wall. Light from the LED is directed from inside to the sensor‘s prism tip and is reflected from there to the light receiver. If the standard leakage in the coupling bracket reaches the fixed maximum, it will enclose the prism tip. So light reaches the light receiver not at all or only faintly. ALLSEAL reacts to this change immediately with a switching operation.
Trouble-free cost reduction.
The absence or insufficient formation of the lubricating film leads to defective mechanical seals and thus costly pump failures. The ALLSEAL maintenance indicator will warn you on time about the condition of your pump. Thus, you will have enough time to avoid serious pump failures by using a combined emergency stop controller.
Benefits:
- Very cost effective smart solution for monitoring a mechanical seal
- Unnecessary and unplanned system downtimes can be avoided
- No environmental contamination
- Compliance with safety regulations (e.g. SOLAS)
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Jon Berggren
Market Manager – Commercial Marine
