EnergyFields

Mechanical Seals

± 1mm

Energy

All LATTY®seal mechanical seals for the EDF are qualified or are undergoing qualification.

the quality of the administrative applications and of the products,

stringency in production,

B 11610 A2

All of the qualifications and certifications, the organisation of the quality system and, of course, the LATTY®seal product B 11610 Ø 127.38 have persuaded the customer to procede with using the BYRON JACKSON food quality pump.

Ø 127.38

it’s well-positioned price, compliance with deadlines, and partnership with the EDF, combine to give LATTY® decisive advantages on external markets.

Ener

gy

Continuing research and innovationThanks to its proximity with its customers, LATTY® is geared up with the resources to respond to and anticipate new material, technical and legislative restric-tions.

Qualification is essential

This is across the board right from internal and/or laboratory testing at the CETIM to installation of the product in a power station.

At Electricité de France, a major and long-standing LATTY® customer, for a product to be awarded approval, it is essential that the design, materials and the suppliers are officially approved.

After equipping all type of French electricity power stations, LATTY® installs its mechanical seals in nuclear power stations in Belgium, Spain, China, etc.

Extract from CETIM in NantesDescribed in report 784184/6J1 by the CETIM in December 2005.

Reference case

IN SPAIN

Nuclear

Fluid Demineralised sealed water- - - - - - - - - - - - - - - - - - - - - - - - - - Temperature 60 °C- - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pressure 3.32 MPa (33.2 bar)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Speed 5 565 rpm - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

In 1988 LATTY® supplied the first LATTY®seal B 11200 seals, via pump manufacturer GUINARD in Annecy, destined for the Chinese power plants of Daya Bay 1 and 2.

B 11200 A4

UNIoN PUmP

B 14810 U3U3V

These pumps originally fitted with packing seals are now fitted with standard B 14810 mechanical seals, with silicium carbide surfaces. A pump liner supplied by LATTY® enables an adaptation without modification.Numerous 300 and 1300 Mw power stations use this equipment. The first was the St-Laurent power station in 1994.

Silicium carbide faces Viton (V) gasket Flushable Spare parts kit

Ø 43

Ø 102

Their removable faces. The reliability of their drive systems proven by numerous tests, particularly during start-up/shutdown phases. The cartridge is easy to work on.

The operating and interchangeabilty conditions, required by the customer, have led to a special design while retaining all of the construction strong points in the specification qualified by the EDF:

Following numerous exchanges and visits, LATTY® was entrusted with the complete installation of B 11610 seals and also with the supply of the cooling circuit.

Energy

In 1998, new David Brown GUINARD contract for the LING AO power station units 1 and 2, and in 2007 two new LING AO units, 3 and 4 will be fitted out with LATTY®seal.

Ener

gy

Reference case

IN SPAIN

Installation carried out jointly with LATTY® technicians and Spanish technicians in June 2005.

Fluid Water containing sealed boric acid - - - - - - - - - - - - - - - - - - - - - - - -Temperature 121 °C- - - - - - - - - - - - - - - - - - - - - - - -Pressure 2.26 MPa (22.6 bar)- - - - - - - - - - - - - - - - - - - - - - - - -Speed 1485 rpm- - - - - - - - - - - - - - - - - - - - - - - - -

This renewed confidence illus-trates a good commercial and technical follow-through, but also favourable feedback on the first installations.

The B 11200 Ø 74 and 102 mm mechanical seals, fitted to pressure EAS/ISBP electric pump units respectively, are derived from our products for the national 900 and 1300 Mw power stations.

The certifications obtained by analogy, and validated by industrial testing on EDF sites, along with the equipment reference documents, favour the decision and reassure the operator of the perform-ances of LATTY®seals.

KSB pumps KWPS 80-250

Application

Fitted by EDF Golfech and LATTY®, 1st put into service on 23/09/04

(1 CTA 101PO N°956500/57).

Range

Sealingtechnique

Fluid Turbid water sealed - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Application CTA PUMP CIRCUIT (cleaning of condenser tubes)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Temperature 40 °C- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pressure 0.5 MPa (5 bar)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Speed 1 450 rpm - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ener

gy

EDF - AmBAZAC

U 4222 + 222 + U2U2V + U2U2V

SHEm

Ø 230

Ø 230 Ø 320

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ø 320

The largely dimensioned lip seals fitted to the hundreds of tur-bines sited along rivers can be replaced by mechanical seals.

An enormous potential

After providing numerous industrial references, the LATTY® sales force has been able to widen its range of action and win new contracts with companies operating a large number of turbines.

With this product, LATTY® proposes major savings in maintenance and product rotation for the production of hydro-electric power.

Hydraulic

Reference case

The coordination of the service centres with the plant and its technical departments has strengthened LATTY’s® position with the EDF, to conclude the contract.

Upgrading the turbines with LATTY® mechanical seals was implemented progressively following the repair contract obtained by our service centres.

The first was commissioned in January 2004 by LATTY® technicians jointly with EDF, and after validation of these first-off units, LATTY® obtained a 3-year contract, renewed for 3 years in 2006, for equipment and maintenance.

The improvements made to the original equipment have enabled the presen-tation of a new project: the installation of a new seal with modifications to the environment and the unit, in order to optimise the seal lifespan.

Group Hydraulic Bulbe

(GEH Limoges - France)

Water + Gear motor oil

Ambient

0.05 MPa (0.5 bar)

500 to 1 250 rpm

River water Fluid sealed

Temperature

Pressure

Speed

0.35 MPa (3.5 bar)

Barrier fluid

40 °C

0.06 MPa (0.6 bar)

400 rpm

Oil

Pressure barrier

In spite of the size of the shaft (320 mm diameter), and the difficult access to these installations, LATTY® has been able to continue to use the U 4222 series which has proven itself on a large number of units.

Assembly and adjustment are difficult phases, so LATTY® technicians assisted our customers for the first installations and trials and also participated in training the maintenance crews.

Silicon Oil (Imperative)

B 11610 N4XP

DESULFURATION ENERGY

Fossil fuel plants

Ener

gy

Ø 87 RB 10610 U2U2E

Ø 165 U 10 000 A2

LATTY® is also present in fossil fuel power stations and particu-larly in smoke desulfurisation installations.

Energy

Ø 263Application

Accessibility for main-tenance of the turbines installed on our rivers is always very difficult and requires major handling equipment. Consequently, over the last few years, overhaul of this type of equipment has brought about a change in sealing systems in or-der to optimise lifespans, shorten servicing times and reduce the number of wear components.

DUmoNT turbine

Friction

faces

divisible

Mechanical seal assemblies have been designed to a precise technical specification, which has enabled the definition of a compensated seal using only divisible friction surfaces, which integrate into the environment with no major modification to the turbine.

Depending on climatic variations, the turbidity of river waters can change (gravel, sand, etc.).

For this reason, an internal clean water circulating system has been installed provided by a pump propeller on the liner, feeding through a filter; the higher pressure thus obtained continually guarantees clear water and optimises lifespans. A friction surface wear indicator is also incorporated.

Components in 2 parts

Upstream

Intake

Output

Range

Sealingtechnique

Fluid Watersealed- - - - - - - - - - - - - - - - -Temperature 10 °C- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pressure 0.1 MPa (1 bar)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Speed 250 rpm nominal 620 rpm overspeed- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Delivery 6 l/min- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Delta P 0.45 Kg/cm2

The operating conditions may be harsh, and as a general rule, the products have a high content and are highly corrosive. All the materials used in the composition of the seals must be suitable for use under abrasive and corrosive conditions, hence the "stationary" type design of seal with face rings in solid tungsten carbide and the wet parts in exotic grades of the Hastelloy® type, etc.

Fluid Suspended limestone sealed gypsum, sulfur dioxide- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Temperature 50 °C- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pressure 0.22 MPa (2.2 bar)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Speed 360 rpm nominal- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Barrier Water at 44 °Cfluid

ROBIN agitator

The examples shown are tandem cartridge assemblies, with LATTY® safety packing seals, installed either on pumps or agitators.

Fluid 10 % water sealed Gypsum, (Non-uniform mixture on start-up >> lumps of gypsum)- - - - - - - - - - - - - - - - - - - - - - - - - -

Barrier 400 cm3 of greasefluid Silicon (Imperative)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Barrier No pressure pressure

Temperature 40 / 50 °C- - - - - - - - - - - - - - - - - - - - - - - - - - -Pressure 0.15 MPa (1.5 bar)- - - - - - - - - - - - - - - - - - - - - - - - - - - -Speed 280 rpm - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

WARMAN pump Type 650 TU-L

Complete range

availableon...

Se ection of types of seals

LATTY®Designations

StandardisedMechanical Seals

Cartridges ModulesStandard

series and derivatives

MarineEnergyThe water

industry Paper mills

Food industryBoiler

systemsChemical industry

Rotating couplings Custom

Sealing technique

Selection of types of seals

Sea ing technique

Our other products

Automobile industry

Our other documents

8313

9ECG

M-E

ne -

09/2

008