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Dear Team, We are facing seal failure in Oligomer application in Polymer plant below are process details : Process Media : Oligomer ( Consists of Therapeutic acid, + Methyle Ethyle glycol ) Temperature : 261 Deg. Celcius. Suction Presure : 5.9 Kg/cm2. Discharge Pressure : 9 Kg/cm2...

Dear Team, We have Ekato Agitator for prepolymer. Seal is of John Crane CK 738 Double back to back arrangement with bearing vertically installed with Plan 53A. Issue is Barrier Fluid which is Ethylene Glycol is repeatedly becoming black coloured and needs repeated replacement. Seal does not...

How could Plan 53A help in arresting leakage of seal instead of existing plan 52. Plan52 is used as barrier fluid will not mix with process fluid WAXY 65, as waxy 65 is a flammable hydrocarbon & process requirement is barrier fluid should not entre process fluid. It's been 25 days seal is...

Dear Sir, I am facing seal failure is WAXY 65 hydrocarbon. Seal is John Crane Type 2609 with flushing Plan 52 & 21 with 3mm orifice First seal was leaking from Inboard & level of barrier fluid was observed rising. So syphon pot was drained & barrier fluid was bought to normal level & pump was...

This is a booster pump meant only for boosting pressure of ammonia from 17kg/cm2 to 20 kg/ cm2.

Dear all, Yet I am not able to upload seal drwg. Can suction press of 17 kg/cm2 & 20 kg/cm2 discharge press. cause high vapour pressure margin ? or vaporisation of product? In this seal I/B seal stationary SIC face is always found grooved & carbon face nose is weared out. I/B stationary face...

Sir can anyone help me to resolve this seal failure issue.

Both Faces of primary as well as secondary seal is flushed with MEthanolfrom its I.D. This is booster pump which increases pressure of ammonia.

Sir in this type of sealewe can see O/B seal with our eyes & is on atmospheric side of seal.

Seal pot contains methanol as barrier fluid & is pressurized by nitrogen 2kg/cm2 above stuffing box pressure. Syphon pot also has water inlet & outlet for cooling barrier fluid. Plan 11 is provided for flushing primary seal from its O.D. Ammonia will come from plan 11 flush the primary seal on...

Also for I/B faces plan 11 is incorporated. Inspite of using EPT O rings seal fails. We have alsi tried with kalrez O ring even kalrez O ring changes shape to square.

Sir this is a fixed speed running pump with 2800rpm. Can there be any other cause of seal failure as erery 4 months O rings change there shape to square which main failure reason.

Dear Sir, I have ammonia seal leakage issue in fertiliser plant. Pump on which seal is installed is a Ammonia booster pump. This is double seal with seal face combination of SIC V/S SIC in Inboard side & SIC V/S Carbon at outboard side.This seal has common gland which incorporates both Inboard...

thread819-380230 Dear sir with ref. to above thread we have one more seal failed at our plant. Leakage was observed from Leak detection port from outboard side of agitator seal. Barrier fluid used is Duraclear of Flowserve make. Process in agitator is Carbo oxhilation. Pressure maintained in...

Sir, 1) Yes Operating pressure in reactor is 41 Kg/cm2 & that of barrier fluid is 44 Kg/cm2. 2) Operators operate this reactor by filling reactor with 100% product i.e. reactor is completely filled with product instead they should fill reactor with 70% product & then pressurize it with nitrogen...

Dear All, I am facing problem with Agitator seal. Everytime seal fails the anti rotation pin shears off from In board stationary face. Portion of In board stationary face also comes out from face. I/B face combination is SIC VS SIC. This has repeated 4 to 5 times. This is double cartridge seal...

Dear all respected members, I have installed seal D RO seal its a back to back seal. API plan given is Plan 53A with pumping screw which has left hand threads. Process parameters are as follow : Product : Organic material name of product unknown. Tempreture : 200deg. celcius. Inlet press : 0.5...

Dear gyaneshwarp what do you mean by stationary seal?

Dear Georgevarghese long agitator shaft has supports near top dish & bottom of vessel, provided with intermediate bearings near gear box. Support is provided to shaft inside vessel, but when checked reactor shaft in dynamic condition with screw driver a noise is heard from inside of reactor...

Sir with ref to above trailing reply for seal failure leakage is from Outboard faces of seal and not from inboard. Sir also can you pls. explain me why I should go for API plan 53 C so that I can explain my seniors and convince them to install plan 53 C.