Configurable. Local. Reliable.Swagelok® Mechanical Seal Support Systems

Plan 11Flush Plan

Plan 12Flush with Strainer

Plan 21Cooled Flush

Plan 32External Flush

Plan 52Buffer Liquid

Seal Pot

Plan 72Buffer Gas

Plan 65APlan 72/76 Plan 65B

• The default flush plan for most pumps.• Removes heat from and ensures proper pressure in seal chamber

• Prevents orifice clogging through the addition of a strainer• Removes heat and flushes particulate from the seal chamber• Ensures proper pressure in the seal chamber to prevent pumped fluid from vaporizing

Plan 13Flush from

Chamber to Suction• Common for vertical pumps.• Removes heat and flushes particulate from the seal chamber

• Removes heat & flushes particulate from seal chamber

• Provides cooled flush fluid to process side of the seal• Removes heat & flushes particulate from seal chamber• Reduces coking or polymerization• Improves fluid vapor margin in seal chamber

• Strainer Prevents orifice clogging • Provides cooled flush fluid to process side of seal• Removes heat & flushes particulate from seal chamber• Reduces coking or polymerization• Improves vapor pressure margin in seal chamber

Plan 53BBarrier Liquid Pressurizedby Bladder Accumulator

• Provides heat removal from inner seal• Used with dual seal arrangement when process leakage to atmosphere cannot occur

• Supplies gas seal with clean, dry buffer gas• Serves as a containment seal in the event of primary seal failure

Plan 14Flush, combination

of Plan 11 & 13

Plan 23Cooled Flush,

Recirculated through Seal Chamber • Removes solids

from flush stream by incorporating a cyclone separator

Integral OrificeFlange AdapterReplace threaded orwelded flange assemblieswith a one-piece flangeadapter with integral orifice.

Swagelok Rotating Equipment Solutions

• Provides clean flush fluid to the seal chamber • Increases seal chamber pressure

Plan 41Cooled Flush withCyclone Separator

• Provides additional heat removal from inner seal• Acts as a secondary seal to prevent process fluid leakage to atmosphere

Plan 54Barrier Liquid

Pressurized byExternal System

Plan 53CBarrier Liquid

Pressurized byPiston Accumulator

Plan 55Buffer LiquidCirculated by

External System• Supplies gas seal with clean, dry buffer gas• Prevents process leakage to atmosphere in the event of a primary or secondary seal failure

Plan 75Condensing

Leakage Collection• Collects and monitors inner seal leakage that condenses at ambient temperatures• Typically with Plan 72

Plan 76Noncondensing

LeakageCollection

• Monitors inner seal leakage that does not condense at ambient temperatures• Typically used with Plan 72

• Supplies gas seal with clean, dry buffer gas• Serves as containment seal in the event of primary seal failure• Monitors inner seal leakage

• Collects leakage of condensing process fluid •Collects leakage of condensing process fluid

Buffer Gas &Noncondensing

Leakage Collection

Leakage Collectionwith Reservoir

Leakage Collectionwith Reservoir

Plan 74Barrier Gas

Plan 62• Prevents formation of, or clears, solids from atmospheric side of the seal faces

Quench fromExternal Source

All service marks and trademarks shown are owned and registered by Swagelok Company unless otherwise noted. © 2019 Swagelok Company.

API 682 Seal Plans• Process Side Plans • Between Seal Plans• Atmospheric Side Plans

• Provides clean & cooled flush fluid to seal chamber

Plan 31Flush with Cyclone

Separator

• Additional heat removal from inner seal • Used with dual seal arrangement when the seal chamber pressure can vary and process leakage to atmosphere cannot occur

Plan 53ABarrier Liquid Seal Pot

Pressurizedby Nitrogen

• Provides heat removal from inner seal • Used with dual seal arrangement when process leakage to atmosphere cannot occur

Thermowell TeesReduce threaded connections andmonitor temperaturewith integratedthermowell pre-weldedinto tube fitting tee.

Orifice UnionEasily add an orifice to a flush system with the orifice union.This fitting makes welding bulky flange assemblies unnecessary. Tagged for visual identification.

Extended Male ConnectorsFor direct connection into your gland. This fitting eliminates the need for a female adapter providing a transition to tubing outside the shroud. Available in 4- or 6-inch lengths with full hex or machine shank for use in tight spaces.

Plan 22Cooled Flush with Strainer

PI

PI PI

PI

TI

Plan 12

From Pump Discharge

To Seal

From Seal

To Pump Suction

From Pump Discharge

To Seal

SealTo Pump Suction

From Pump Discharge

To Seal

From Pump Discharge

Coolant In Coolant Out

Drain

From Pump Discharge

To Pump Discharge

To Seal

To Seal

Flush Source

To Seal

To Pump Suction

From Pump Discharge

• Reduces cooler duty extending the life of the close-clearance throat bushing

From Pump

Discharge

To SealDrain

Coolant In

Coolant Out

TI

Plan 52

TI

LSH

LSL

LT

PIPT

To Collection System

CoolantIn

CoolantOut

Buffer Fluid Drain

TI

Plan 53A

TI

LSH

LSL

LT

PIPT

CoolantIn

CoolantOut

Buffer Fluid Drain

From External Pressure Source

TI

Plan 53B

PI

PI

TI

TI

PI

Bladder Charge

CoolantIn

CoolantOut

Drain

DrainBarrier Fluid

Make-up

PI PI

TI

Plan 11

PI PI

TI

Plan 13

SealChamber

Plan 14

TI TI

PI PI

Plan 21

TI

PI

TI

PI

TI

PI

PI PI

TI

PI

Plan 22

TI

PI

TI

PI

Plan 23

To Seal

From Seal High-point Vent

Drain

Coolant Out

Low-point Drain

Coolant In

PI PI

FI

PI

TI

Plan 32

TI

TI

PI

PI

PI

Plan 41

Coolant Out

Drain

Coolant In

Plan 31

TI

PI

PI

PI

Oklahoma | West TexasTulsa • Oklahoma City • Amarillo • Odessa

918.258.8661 okwt.swagelok.com

Plan 51Quench from

Reservoir• Prevents icing on the atmospheric side of the seal• Is typically used on vertical pumps

PI

Plan 51

Fill

To Seal