Flip-Flap Valve Type

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Minimise the risk of hose transfer system oil spillsdue to tanker breakout or internal pressure surge incidents

The most reliable and efcient Marine Breakaway Couplings in the world

Flip-Flap Valve Marine Breakaway Couplings
http://www.gall-thomson.co.uk/mailto:[email protected]


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Minimise risk of spillsSpills can delay contract delivery and addcosts to projects. Damage to assets and theenvironment means downtime and clean-up costs. Workforce injury can have shortand long-term consequences. Litigation,diminished reputation, higher insurance andinvestor costs can compromise the focus andperformance of a business.

From a single event, any or all of theseconsequences can quickly evolve beyondyour control.

Using the proven technology of the GallThomson Flip-Flap Valve Marine BreakawayCoupling will remove this risk.

The bene t is peace-of-mind, mitigation and ademonstration that you have taken reasonablesteps by placing a proven and market leadingMarine Breakaway Coupling into your transfersystem.

Appl icationsSuitable for certain low viscosity products orshort-term crude oil terminal operations, fueland liquid gas (LPG) transfer systems andtemporary loading and of oading systems.

The Gall Thomson Flip-Flap Valve Marine Breakaway Coupling (MBC) provides an identied safe parting point in offshorehose transfer strings and automatically shuts off product ow in the event of a tanker breakout, or an extreme and damagingpressure surge incident during loading and ofoading operations.

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1. Single point mooring, FPSO, FSO, FSUand other offshore terminal oil production,fuel and bunker oating hose strings e.g.barge/pontoon arrangements.

2. FPSO, FSO, FSU and other offshore oilterminal product reeled and in-air and

submerged catenary hose strings.3. Underbuoy and CBM/MBM submarine

hose strings.

4. Subsea and riser high pressurelive crude exibles.

5. Well choke and kill emergencydisconnect systems.

6. Early Well Test or Early ProductionSystems.

l Avoid ma jor offshore oil spills

l Protect the environment

l Save the expense of oil spill clear up

l Enhance the safety of your workforce

l Prevent costly system damage

l Minimise tanker/terminal downtime

l Avert negative media a ttentionl Benet from lower insurance premiums

l Maximise terminal integrity

l Project a professional company image


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Minimum headlossDue to the special Flip-Flap Valvearrangement which accommodates maximumopen ow path, ow obstruction and headlossare minimised.

The only other proven MBC in the industrythat offers lower headloss is the Gall ThomsonPetal Valve MBC.

100% leak-free shut-off100% leak-free shut-off closure provides totalsafety whilst transferring hazardous cargoessuch as liquid gases, re ned petroleumproducts and hazardous chemicals.

Maintenance freeNo moving parts during normal serviceensures a lengthy maintenance-free period of3-5 years.

Protected against corrosionA tried and tested MBC Corrosion ProtectionSystem enhances product longevity. The

corrosion resistant break assembly is reliablefor the full maintenance-free period, asproven for more than three decades in someof the worlds harshest environments.

Buoyancy Due to the lightweight construction of theMBC and the standard reserve buoyancyof adjacent hoses, buoyancy aids are notusually required when installed in a oating orsubmarine hose string.

Self-containedThe unit requires no outside power source.This eliminates dependability on externalcomponents or mechanisms which mayotherwise be prone to damage in harshmarine conditions.

No human elementThe system is automatic and instant, requiringno human activation.

Self-energisedThe shut-off is powered by the kinetic energyof the owing product acting on the valveassembly assisted by torsion and compression

springs. The unit is therefore not vulnerableto the reliability of an external source powersupply.

The springs are not depended upon to effectvalve closure, however, in the event of noproduct ow during activation, the springs arepowerful enough to achieve full shut-off.

Performance

An unbeatable record for in tegri ty and reliabi lity

Of the large number of tanker breakout or extreme pressure surge incidents employing Gall Thomson Flip-Flap Valve MBCs, every device has operated preciselyas intended; saving untold hose and structural damage, preventing pollution and averting risk to marine operations.

Following MBC activation, each unit has been re-instated for re-employment into its respective transfer system.

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Re-usableThe coupling can be easily re-instated andreturned to service after a tanker breakout oran extreme pressure surge; or re-installed in anew hose string during a routine change out.

Long life

Due to the lack of moving parts and protectivedesign, the Gall Thomson Flip-Flap MBC willoutlive many hose strings and remain in-linewithout any maintenance for at least 3-5 years.

The Gall Thomson MBC has a proven life spanof 20 years; assuming maintenance is carriedout at the recommended intervals.

Ease of ttingThe unit is simply bolted between hose joints

in the recommended hose string locationand requires no commissioning or installationengineer; this function normally beingperformed by the usual site personnel orcontractor.

RobustThe design ensures that operational loadssuch as bending moments, torsional stressesand cyclic applied loads created by wave andwind motion, tanker movement and pumping

vibration are absorbed and have no adverseeffects on function or condition.

Compact and lightweightThe compact and lightweight design negatesthe necessity for additional buoyancy andensures that there is no detrimental effect onthe hose string. The diameter of the unit beingsmaller than the adjacent anges and hoses,avoids external mechanical damage to the

MBC and stress fatigue to adjacent hoses.

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1. Valve discs arepositioned in line with the

ow. These lock eachother open, offering

minimum headloss.

3. The discscontinue to rotateuntil they havemoved through90 degrees.

2. The couplingparts, the combinedenergy of the biassprings and productvelocity ip thediscs through acontrolled arc.

4. The discs snaponto their seats,providing 100%leak-free shut-off.

Flip-Flap Marine Breakaway Coupling -Sequential Break/Valve Closure


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Material composition

Offshore grade forgings are used for the mainbody components. The break assembly ismade from high grade titanium alloy that isindependently rated, tested and certi ed.

Extensive material testing combined with long-term eld experience ensures performanceintegrity and in-service reliability in allenvironmental conditions.

Materials can be varied to suit desired

specications.

BreakstudThe nal breakstud rating is determinedfollowing basic calibration and proof tensiletesting on sample breakstuds. These samplesare machined from the same titanium materialin its nal treated condition as used in the nalproduct. These breakstuds are not shearboltsand therefore act in controllable tension.

CalibrationThe unit can be pre-set to suit the limitations ofthe product transfer system in respect of linearoverload and pressure surge.

Precision engineeringManufactured to ne tolerances and alwaysdelivering as expected performance whenit matters.*

*Con rmed by eld operators performance reports.

Specication

Sizes: range from 3 to 24 nominal bore.

Activation type Controlled closure Instantaneous closure

DOUBLE SHUT-OFFLinear overload and ow pressure surge Standard Standard

Linear overload only Stabilised Stabilised

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Double shut-off

Double shut-off provides valve closure on boththe upstream and downstream sides of theseparation point.

Instant closure

Closure delivers instant shut-off. This is suitable foroperations with lower loading rates or short pipingsystems where damage to asset due to instant clo-sure is unlikely.

Controlled closureVariable closure speeds provide anti-line shockshutdown to protect up-line assets such as pumpsand hoses.

Standard MBCThe Standard MBC will activate in twocircumstances. It is the systems safety fuse.

Linear overload:

The Standard MBC will part on linear overload.This may occur due to a tanker movingoff station due to a manoeuvring fault, anunexpected wave, wind or general weatherconditions.

Where usually in this circumstance the hosesystem without a Gall Thomson MBC will

rupture and provoke a spill, the Standard Unitwill activate and shut down the ow.

Flow pressure surge:

Where system parameters permit, theStandard MBC will activate where an extremeinternal pressure surge occurs: caused by anunusual event such as an inadvertent valveclosure downstream. The activation pressure isset to suit the systems operational parameters.

Stabilised MBCLinear overload:

The Stabilised MBC will activate on linearoverload as with the Standard MBC.

Flow pressure surge:

The Stabilised MBC will not activate due toa pressure surge but is instead designed topossess the same integrity as the rest of thetransfer system. The entire transfer system istherefore designed to withstand the maximuminternal pressure surge that the system maygenerate without damage.

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The Gall Thomson range Petal Valve Marine Breakaway CouplingFlip-Flap Valve Marine Breakaway CouplingWelin Camlock CouplingGlobal support and Aftersales Care

Product descriptions and specications are subject to change without prior notice. Gall Thomson recommends that all information and data are conrmed with our technical department before pecifying,ordering or commissioning. Copyright All information provided is subject to international copyright, trademark and patent laws and cannot be reproduced without the expressed and written permissionof Gall Thomson Environmental Ltd. Trademark protected. Gall Thomson. Protected by Worldwide Patents.

G.F.E1304D A Signum Technology company

+44 (0) 1493 857936 [email protected] www.gall-thomson.co.uk

Gall Thomson Environmental LtdPommers Lane, Great YarmouthNorfolk, NR30 3PE, United Kingdom

Tel +44 (0) 1493 857936 www.gall-thomson.co.uk

Fax +44 (0) 1493 850888 [email protected]

Queens Award for Technological Achievement
mailto:[email protected]://www.gall-thomson.co.uk/http://www.gall-thomson.co.uk/mailto:[email protected]://www.gall-thomson.co.uk/http://www.gall-thomson.co.uk/mailto:[email protected]:[email protected]

Flip-Flap Valve Type

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