Products

API Plan 66B

API Plan 66B

An orifice plug in the drain port minimizes the seal leakage leaving the seal gland and allows for detection of a seal failure by an alarm of the monitoring pressure transmitter.

A  Pressure transmitter
B  Segmented bushing
C  Orifice plug drain

Seal chamber details

1  Flush (F)
2  Pressure transmitter sensing port (PIT)
3  Quench (Q)
4  Drain (D), with orifice plug installed
5  Orifice plug
6  Seal chamber


Example seal: EagleBurgmann H75VA4-S single pusher mechanical seal.

P&ID according to API

Key

3  Quench (Q)
4  Drain (D)


PIT  Pressure transmitter with local indicator

Features

  • Utilizes an orifice plug to limit the amount of leakage leaving the seal gland.
  • Normal leakage continues to flow freely to the drain port.
  • Excessive leakage causes a pressure build-up upstream of the orifice plug which subsequently triggers a pressure alarm by the pressure transmitter.

Application

  • Commonly used on horizontal pipeline pumps.

Remarks, checkpoints

  • It must be ensured that the leakage from the drain port is collected and piped to a leakage recovery system.
  • Drain connection on the gland must be at the bottom-most position (6 o’clock).
  • Media properties to be checked for possible blockage of the orifice plug due to congealing.

Pump media characteristics

  • Low to medium temperature liquids

Location, function

  • Atmospheric side
  • Leakage limiting detection and alarm

Configurations

1CW-FL, 1CW-FX

 

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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.

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