5instructions640

5instructions640




No.    1000-00104

Framo Submerged Cargo    Pumps    oate/sign:    ujan77/

PURGINGINSTRUCTION    £*9*    5ofs

Rev. I:    08Jun04/AGAa

4 TROUBLE SHOOTING

Warning: To preveni damage from hazardous cargoes, take necessary precauttons, wear safeły gear and avoid contact with spray/gases.

Symptom:

POSSIBLE REASON:

Remedy: *)

Not possible to purge the cofferdam (no air. inert gas or liquid coming out of the check pipę when purging)

(See also chapter 1)

a)    No or insufficient purging medium supply

b)    Blocked cofferdam system

Notę!

fn case steam is used in attempt to elear a blockage in pamp cofferdam system pay special allention not to over pressarize the pamp/pipę stack

a)    Check valves. hose connections and purging medium relief valve (open at approx. 3 bar).

b)    Check the exhaust trap and the piping on deck for blockage. Open if possible.

b1) Disconnect check pipę from pump unit (Icrwer seal house) - watch oat for possible pressurized lrqaid rn cofferdamli By carefully purging check if the blockage is located in the check pipę or in the pump/ pipę stack cofferdam Depending on the naturę of the medium blockmg the cofferdam system use steam or solvent to dissolve the blockage.

Dismantling of pump might be required.

Notę! Pressare test pamp after assembly

Cargo leakage to pump cofferdam.

(See also chapter 1)

General

Notę!

Afways pressare test pamp prror to and after dismantling. This is regaired to locate possible leakage and to confirm no leakage apon completion of repair.

Pressure test pump cofferdam system at approx 3 bar.

Check for leakage - if required spray with soapy water to locate the leakage

a) Worn cargo seal Notę; If no leakage is detected by pressure test it islikely that the cargo leakage to cofferdam is caused by worn cargo seal. (the upper seal lip is sealing when pressurizing cofferdam).

a) Replace cargo seal set.

AJso. carefully check ceramic sleeve for possible damage-wear

b) Leaking seal element in flange connection

b) Check for loose bolts and for pitting corrosion in seal faces - in case of corrosion repair is required

When assemble.renewdamaged seal element.

c) Crack/pinhole in piping

c) Contact a Framo Service Station.

*) Ref inslruction for maintenance and repair for actual pump


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