EagleBurgmann international
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Products
API Plan 75
API Plan 75
A containment seal chamber leakage collection system for condensing or mixed phase leakage on arrangement 2 unpressurized seals with containment seals.
A From mechanical seal
B To vapor collection system
C Drain
Seal chamber details
4 Flush (F)
5 Containment seal vent (CSV), plugged
6 Containment seal drain (CSD)
7 Gas buffer inlet (GBI), plugged unless used with a Plan 72
8 Seal chamber
Example seal: EagleBurgmann H75A4-C dual pusher mechanical seal.
P&ID according to API
Key
1 To vapor collection system
2 To liquid collection system
3 Test connection (if specified)
5 Containment seal vent (CSV), plugged
6 Containment seal drain (CSD)
7 Gas buffer inlet (GBI), plugged unless used with a Plan 72
LI Level indicator
LIT Level transmitter with local indicator
PIT Pressure transmitter with local indicator
* If specified
Features
- This plan can be used with buffer gas (Plan 72) or without buffer gas (Plan 71).
- Avoids direct leakage of pumped media to the atmosphere.
- Liquid leakage is collected in the leakage collector and vapors pass to the collection system.
- Excessive leakage and the use of an orifice in the outlet line of the collector together leads to a pressure build-up in the collector and triggers a pressure alarm at 0.7 bar (10 PSI) with the help of a pressure transmitter.
Application
- For condensing media.
- For configurations utilizing an outboard containment seal – contacting or non-contacting type.
- Generally used in combination with a Plan 72 nitrogen purge.
Remarks, checkpoints
- Set the pressure transmitter alarm to a pressure of 0.7 bar (10 PSI) so as to trigger an alarm when the pressure in the leakage collector increases. This indicates inboard seal leakage.
- Ensure that the vent line is always open and an orifice is present to generate back pressure.
- Always mount the leakage collection system below the pump centerline.
- Use sloping lines from the CSD port to the leakage collector.
- Use the level gauge to ascertain if the leakage collector needs to be drained.
Pump media characteristics
- Hazardous / environmentally harmful (generally in combination with additional API plan).
- Clean non-polymerizing fluids
- Fluids condensing at ambient temperatures.
Location, function
- Between seals
- Leakage alarm and collection
Configurations
2CW-CS
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