Products

API Plan 53A

API Plan 53A

Pressurized barrier fluid reservoir supplying clean fluid for an arrangement 3 pressurized dual seal.

A  From mechanical seal
B  To mechanical seal
C  Filling connection
D  Cooling water IN
E  Cooling water OUT
F  Drain
G  From external pressure source

Seal chamber details

4  Flush (F)
5  Liquid barrier OUT (LBO)
6  Liquid barrier IN (LBI)
11  Seal chamber


Example seal: EagleBurgmann LY9DZTT dual pusher mechanical seal.

P&ID according to API

Key

1  From external pressure source
2  Reservoir
3  Make-up barrier liquid
7  Cooling water IN
8  Reservoir barrier fluid drain
9  Cooling water OUT
10  Barrier fluid drain


LI  Level indicator
LIT  Level transmitter with local indicator
PIT  Pressure transmitter with local indicator

 

Features

  • The pumped media never leaks to the atmosphere unless the reservoir pressure is lost.
  • A nitrogen source is required for pressurization.
  • Provision of cooling coil inside the reservoir or an external water or air cooler takes care of the heat removal.
  • Uses an internal circulating device to ensure barrier liquid circulation.
  • Barrier liquid enters the process medium through the inner seal faces.

Application

  • For services where product dilution is acceptable.
  • For services where media is unsuitable for lubricating the inner seal faces.
  • For barrier pressures up to16 bar (232 PSI).

Remarks, checkpoints

  • Always ensure that the source pressure is higher than the desired barrier pressure.
  • Vent the system before start-up. Later ensure that the vent line always remains closed.
  • Sense the seal inlet and outlet line temperatures. Difference in the temperatures is an indication of proper flow.
  • Decrease in the reservoir level is an indication of inboard or/and outboard seal leakage.
  • Ensure that the barrier pressure is always higher than the seal chamber pressure by at least 1.4 bar (20 PSI).
  • For barrier pressures above 16 bar (232 PSI) use Plan 53B, 53C or 54.
  • Check with the process engineer if product contamination is acceptable.
  • Ensure the compatibility of barrier liquid with the pump media.

Pump media characteristics

  • Suspended solids
  • Polymerizing and contaminated media
  • Poor lubrication properties
  • Hazardous / environmentally harmful
  • Leakage may form solids
  • Close to vaporization point
  • Can tolerate dilution with barrier media

Location, function

  • Between seals
  • Barrier system (psealchamber < pbetweenseals)
  • Lubrication, flushing and cooling for both inboard as well as outboard seals.

Configurations

3CW-FB, 3CW-BB, 3CW-FF

 

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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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