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Products
API Plan 14
API Plan 14
Recirculation from pump discharge through a flow control orifice to the seal and simultaneously from the seal chamber through a flow control orifice to pump suction.
A Flow control orifice
Seal chamber details
1 From pump discharge
2 To pump suction
3 Flush inlet (FI)
4 Flush outlet (FO)
5 Quench (Q)
6 Drain (D)
7 Seal chamber
Example seal: EagleBurgmann LEK777 single pusher mechanical seal.
P&ID according to API
Features
- Plan 14 is a combination of Plan 11 and Plan 13.
- Acts as a flushing as well as a self-venting plan.
- Cool fluid enters from Plan 11 piping, and hot fluid as well as seal chamber pressure is relieved through Plan 13 piping.
- The flush is directed onto the seal faces.
- Allows creation of sufficient vapor pressure margin independent of throat bushing design.
Application
- Generally used on vertical pumps.
Remarks, checkpoints
- Orifice size should be at least 3 mm (1/8").
- The flow of the flush fluid across the seal chamber must be sufficient to remove the heat and increase the pressure. Orifice size to be calculated carefully to ensure desired flush flow-rate.
- Not applicable if difference between seal chamber pressure and suction pressure is very low. In this case Plan 13 is recommended.
- A high-point vent must be provided in the vertical pump seal chamber (or seal gland) to ensure seal faces never see vapors.
Pump media characteristics
- Clean, non-polymerizing fluids with moderate temperature.
- Light hydrocarbons.
Location, function
- Process side
- Flushing and cooling
Configurations
1CW-FL, 1CW-FX, 2CW-CW, 2CW-CS, 3CW-FB
3CW-BB*, 3CW-FF*
* Remark: The configurations listed for each individual piping plan are to be understood as recommendations including possible utilizations which may also be applied.
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The Eagleburgmann Group
Sealing technology for plants and machines
EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.
Mechanical seals and more
Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.
What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.