Références Construction navale

Crane ship "Saipem 7000"
Semisubmersible crane and pipelaying (J-Lay) DP vessel

Application information N° 101

Ballast tank application

Saipem 7000 was originally built as a semi-submersible crane vessel (Micoperi 7000) capable of lifting and installing offshore structures up to 14’000 tons in weight. In 1999 the vessel was converted to accom-modate a « J »-Lay Tower and pipe handling equipment for laying pipelines in deep water areas worldwide.
The tower is the largest in the world with a height of 135 meters, while the overall weight of the complete pipe laying facilities is 4’500 tonnes. The ballast tanks are fully controlled with 146 pcs. of stainless steel Trimod´Besta level switches.

Ballast System

Computer controlled system:

source: http://www.saipem.com

Classification

Lloyds Register and RINA

Compliance

NMD, HSE, USCG Rules

Trimod´Besta Ship register approvals

Installed level switch types

Why Trimod´Besta?

Why Trimod´Besta?

The top quality of the switching mechanism, the stainless steel design and the exceptional life time guarantees a service free operation. Trimod´Besta level switches are designed for a life time of more than 30 years.

Marine Scrubber Systems

Application information N° 102

Application

Burning fossil fuel in ship diesel engines creates large amounts of toxic sulphur oxides (SOx) which are harmful to the world’s ecosystems. Not only the marine environment but also the human health can be seriously damaged for long term. For this reason, the ship owners are permanently called upon to meet the current regulations of the International Maritime Organization (IMO) which is appealing to the ship owners to reduce the output of SOx and triggers them to adapt their existing exhaust cleaning systems according to IMO’s latest rules. Due to the new scrubber technologies, the ship-owners have the possibility to run their fleets with cheaper heavy fuel oil while the output of toxic exhaust gases is reduced.

Trimod´BestaShip register approvals

Installed level switch types

EN/DIN flange PN16 DN100
Hastelloy C Standard execution for operating temperatures up to 330°C.

EN/DIN flange PN16 DN100
Hastelloy C High temperature execution with heat exchanger for operating
temperatures up to 400°C.

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Typ A 41C80 404

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Typ HA 41C80 404

Why Trimod´Besta?

Why Trimod´Besta?

Trimod´Besta convinced scrubber manufacturers with customised solutions which are matching perfect with the rough conditions in the cleaning process inside the scrubber units. The level switches withstand high temperatures and the usage of Hastelloy C material, which is very resistant against aggressive liquids, assures a very long life time even in ambitious applications. Thousands of Trimod´Besta level switches are used in scrubber applications controlling the levels of different types of liquids ensuring a failure-free process. Further advantage was the fast availability also for customised products required in large quantities.

Navy Industry

Application information N° 103

Application

Trimod´Besta level switches have been tested from NSWCCD Naval Surface Warfare Centre, Carderock Division for 36 months without failure on the USS Thomas S. Gates. As a result the US fleet has been equipped step by step with Trimod´Besta level switches.

Within the past years, we delivered several thousand level switches to the global industries (submarine, ship, air craft carrier).

Trimod´BestaShip register approvals

Installed level switch type

Why Trimod´Besta?

Extract of a newspaper article

The BESTA TriMod (see Figure 2) was tested on the USS Thomas S. Gates (CG-51) for 36 months without failure. Much more reliable than the mercury float level sensor, the BESTA TriMod’s electronics are located outside the tank, so there is no need to open a sewage tank to replace a failed sensor. Only the sensor’s float (stainless steel) is located inside the tank. NSWCCD is now finalizing a MACHALT to transition the BESTA TriMod level sensor to the Fleet. (...)

Submarine Industry

Application information: N° 104

Application

Since 1995 we have delivered a lot of Trimod´Besta level switches for the submarines of the Australian Navy.
The level switches control the interface level between sea water (density 1.017-1.030) and fuel (density 0.820-0.860) in the fuel thanks.

Collins Class

This submarine´s operational characteristics and range have been tailored specifically for its defence and two-ocean surveillance role in the Royal Australian Navy. Designed to be as quiet as advanced technology can achieve, Collins has been developed from five generations of submarines designed and built over the last 20 years for the Swedish Navy.

Trimod´BestaShip register approvals

Installed level switch type

Features:

Why Trimod´Besta?

Why Trimod´Besta?

The top quality of the switching mechanism, the stainless steel design, the usage of Hastelloy C material – which is very resistant against aggressive liquids – and the exceptional life time guarantees a service free operation.

Trimod´Besta level switches are designed for a life time of more than 30 years.

Références Pétrole et gaz

FPSO BW Pioneer in Gulf Of Mexiko, USA

Application information N° 201

Ex-proof Application

The BW Pioneer, a floating production storage and offloading (FPSO) vessel for the Gulf of Mexico is operated by BW Pioneer Ltd. an affiliate of BW Off-shore. The vessel is turret moored at a water depth of about 2600 meters – by far the deepest for an FPSO. The concept of Submerged Turret Loading (STL) is an anchored submerged buoy with an integrated turret. The mooring lines and the riser for the fluid transfer are connected to the turret within the STL buoy. The tanker is connected to the system by pulling the STL buoy into a mating recess in the bottom of the ship. When the STL buoy is locked to the tanker the vessel can freely weather wane without the aid of propulsion.

With its advanced safety features the ship withstands environmental loads from currents, waves and wind, connects to the buoy in waves up to 6 meters high and makes the process of offshore loading weather independent.

Trimod´Besta level switches are located in the BW Pioneer’s «connection room», which gets flooded while the ship connects to the buoy.

source: www.maritime-connector.com

Requirement for level switches

Ex-Approval

EPS 09 ATEX 1238 X

Installed level switch types

Stainless steel switch, IP68 enclosure, flameproof housing,
40 meter cable and gold plated microswitch contacts.

Why Trimod´Besta?

Why Trimod´Besta?

The top quality of the switching mechanism, the stainless Trimod´Besta level switches are trusted to start and stop the process of pumping the seawater out and to protect the pumps from running dry.

The chosen explosion proof switches are certified acc. to EN 61079 and withstands very harsh conditions.

Luginetsky gas compressor station in Strezhevoy, Western Siberia, Russia

Application information N° 202

Ex-proof Application

Natural gas is highly pressurized as it travels through an interstate pipeline. To ensure that the natural gas flowing through any pipeline remains pressurized, compression of this natural gas is required periodi-cally along the pipe. This is accomplished by com-pressor stations, usually placed at 40 to 100 miles intervals
along the pipeline. The natural gas enters the compressor station where it is compressed by a turbine.

In addition to compressing natural gas, compressor stations also usually contain some type of liquid separators, much like the ones used to dehydrate natural gas during process. Usually, these separators consist of scrubbers and filters that capture any liquids or other undesirable particles from the natural gas in the
pipeline. Although natural gas in pipelines is considered ‹dry› gas, it is not uncommon for a certain amount of water and hydrocarbons to condense out of the gas stream while in transit. The liquid separators at compressor stations ensure that the natural gas in the pipeline is as pure as possible, and usually filters the
gas prior to compression.

Requirement for level switches

Ex-Approval

PTB 03 ATEX 1006

Installed level switch types

standard square flange PN 25
standard square flange PN 25
ANSI 3”, cl. 900
standard round flange PN 25

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Standard range version (square flange) Picture shows a similar switch to Z54K8 01 07

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Industrial range version (ANSI flange) Picture shows a similar switch

Why Trimod´Besta?

Why Trimod´Besta?

Bachofen can offer explosion proof switches from PN25 up to ANSI cl.900 in totally stainless steel design for liquids with very low density. The switches can withstand the extremely harsh conditions in Siberia which means ambient temperature of +36°C during summer to and -55°C in wintertime.

Inert gas production on ships

Application information N° 203

Application

On tankers inert gas is being pumped into the cargo tanks during off-loading of flammable liquids. The inert gas controls the environment and prevents the formation of a combustible substance. It is produced on board the tankers by burning kerosene or exhaust gases inside an inert gas generator. Within the inert
gas generator, Trimod´Besta level switches are installed as high and low alarm switches in seawater tanks where soot particles and water soluble substances are washed out of the gas.

On FPSOs (floating production storage and offloading vessels) the inert gas generator is typically made of special steel 904L or SMO 254. In the application you see below, the Trimod´Besta level switch is installed into a customized stainless steel float chamber.

Conditions

Installed level switch types

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level switches type A 01 041

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Test actuator type 2385

Why Trimod´Besta?

Why Trimod´Besta?

Customized stainless steel float chamber with Trimod´Besta level switch for low level alarm.

BP Bruce, North Sea 340 km NE of Aberdeen, Scotland

Application information N° 204

Bruce was discovered in June 1974 in acreage licensed to BHP in the 4th licensing round. Condensate, a light crude that exists as gas under reservoir conditions, was found 4000 metres below the seabed in a water depth of 121 metres. Further drilling was largely unsuccessful. However interest in the prospect was rekindled in early 1981 when BP discovered gas/condensate in an adjacent 5th round block in the centre, followed by a further discovery to the east by Total in 1984.

The transport system comprises a 6 km long, 32» diameter gas export pipeline that joins the 32» Total operated Frigg UK pipeline, taking gas to the St. Fergus Terminal. Further a 248 km long, 24» diameter oil export pipeline to the BP FPS unity platform and thence into the BP-operated Forties Pipeline System. The PUQ platform, (process / utilities / quarters) and D (drilling) platform are linked by a 47 metre bridge.

source: www.oilrig-photos.com

Requirement for level switches

Installed level switch types

Totally 83 Trimod´Besta units are installed.

cl.150
cl. 150
cl. 300
cl. 600
cl. 600
cl. 900
cl. 150
cl. 150

low density 0.5 kg/dm³
interface control
low density 0.5 kg/dm³
low density 0.5 kg/dm³
interface control
low density 0.5 kg/dm³
low teperature appl.
low teperature appl.

All switches are fully in stainless steel and IP67. They are mounted in carbon steel, low temperature carbon steel and stainless
steel float chambers.

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Type 5DBE28 131R 07

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Type 5TDB 131R 07

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Type 5TDB 131R 07

Why Trimod´Besta?

Why Trimod´Besta?

The 3 modular design offers a large product range for very different applications. All types are available full made in stainless steel. Bachofen offers also tailor made float chambers to install the switches in a by pass configuration. All wetted parts are available with material certificates.

Références Pétrochimie & chimie

Fife Ethylene Plant in Mossmorran, Schottland

Application information N° 301

Ethylen cracker

ExxonMobil Chemical´s Fife Ethylene Plant (FEP) is one of
Europe´s largest and most modern ethylene plants. Construction
at Mossmorran, 25 miles north of Edinburgh, began in 1981 and
the plant was officially opened by the Queen in 1986. It was the
first plant specifically designed to use natural gas liquids from
the North Sea as feedstock.
The plant has an annual capacity of 830’000 tons of ethylene.
To make ethylene, ethane feedstock is heated to almost 900°C
to ‹crack› it to ethylene in the steam cracking furnaces. The gas
stream is then cooled to below -160°C to recover the valuable
ethylene product.

Requirement for level switches

Installed level switch types

Totally 114 Trimod´Besta level switches and 110 float chambers are installed in the hot (400°C) and in the cold (-160°C) part of the ethylene production process.

Switch types
(4 examples out of 21 different switches)

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Why Trimod´Besta?

Why Trimod´Besta?

Bachofen offers level switches for applications from -200°C to +400°C and from vacuum to 320 bar process pressure. High reliability, an unbeatable life time as well as long lasting experience in handling ambitious projects were further arguments for the contractor to choose Trimod´Besta level switches and float chambers.

References Production d'énergie

Ex-proof application in the power generation Co-Generation plant in Sydney, Australia

Application information N° 401

Ex-proof application

The photo on the front page shows a Co-Generation plant. Trimod´Besta level switches type ZKK5 01 04 are installed. They are used as low level alarm in the recycling process of the waste water cleaning.

The energy of the methane gas coming from the digesters powers large generators which in turn deliver the power for the plant itself.

Requirement for level switches

Installed level switch types

Why Trimod´Besta?

Why Trimod´Besta?

Low / high power heaters, Eskom Hendrina power plant in South Africa

Application information N° 402

Applications

Trimod´Besta level switches mounted in float chambers are used in low power (LP) and high power (HP) heaters of the coal fired Eskom Hendrina Power Station in South Africa. This power station has ten 200 MW units with a total installed capacity of 2’000 MW.

Hendrina Power Station came into operation between June 1970 and December 1976. It is one of Eskom›s oldest operating power stations and the only one with 10 units.

When it was built, it had the longest turbine hall of any Eskom power station. Between 1995 and 1997 half of Hendrina’s 10 units were refurbished and now boast some of the most advanced system control technology in the world.

The station’s 5-in-1 control room was the first in the southern hemisphere.

Requirement for level switches

Technical details

Installed level switch types

The material of the float chambers is heat resistant carbon steel 15Mo3. The level switches are equipped with heat exchangers and partially with composites flanges made of heat resistant carbon steel 13CrMo44 or stainless steel.

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Why Trimod´Besta?

Why Trimod´Besta?

Bachofen AG offered not only special switches for high temperature applications (max. 400°C) but also tailor made float chambers in heat resistant carbon steel.

Nuclear power station in Beznau, Switzerland

Application information N° 403

Plant information

The power plant is on an island formed by the course of the river and the channel for the Beznau hydro-electric power plant. Given the sufficient supply of cooling water from the Aare, there is no need for a cooling tower. Beznau consists of two near-identical units, Unit 1 and Unit 2. Their net output is 365 megawatts (MW) each. Both are baseload power plants, i.e. they generate
uniform electric power round the clock. They operate all the year round, except two to four weeks in summer, when the plants are shut down for their annual overhaul and replacement of their fuel rods.
Both units at Beznau nuclear power station are equipped with Westing-house pressurized water reactors. In these reactors, the water flowing through the reactor core is highly pressurized, so that it can not boil, despite the temperature of 312°C.

In the two steam generators, the heat generated in the reactor is released into a second circuit. Here, the water is completely sepa-rated from the first circuit and comes to the boil at lower pressure. The resultant steam is channelled on to the turbines which drive the generators.

source: www.axpo.ch

Requirement for level switches

Installed level switch types

The power plant consists of about 100 level switches. The switches are used as high-, high high-, low- and low low-alarm and as safety relevant turbine trip. They are installed in the moisture separator reheaters, condensers, low- and high pressure preheaters, in feed-water tanks and as well in the Refuna heat
exchangers.
Refuna supplies heating from the Beznau nuclear power plant to around 15’000 residents of the region. Refuna makes an important contribution to a clean environment in this region.

PN 25
PN 25, protection bellow
EN/DIN PN 16
ANSI cl. 1500, ring joint
PN 25, pneumatic on/off
EN/DIN PN 16, pneumatic on/off
EN/DIN PN 63, pneumatic on/off

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Why Trimod´Besta?

Why Trimod´Besta?

Extremely high reliability and lifetime of the switches. Excellent technical support. Ability to offer also tailor made replacements for the 40 years old switches, which means that no new approval procedure is necessary.

Références Construction de systèmes

Arroyito heavy water production plant in Argentina

Application information: N° 501

The plant

The Industrial Heavy Water Plant (PIAP), located at Arroyito (Province of Neuquén) is classified as a high-technology plant among conventional chemical industries. Its production capacity amounts to 200 tons per year and is split into two production lines of 100 tons each.

The process selected and applied by the PIAP for obtaining heavy water is based on a method known as «Monothermal Ammonia-Hydrogen Isotopic exchange».

The electromechanic equipment plus the structures weigh more than 27’000 tons and include, among others 250 heat exchangers, 240 pressure vessels, 90 gas compressors, 13 reactors, 30 distillation columns Additionally.

The PIAP contains two ammonia-synthesis reactors, each one of them with a production capacity of 2150 tons per day. These synthesis units are the largest in the world and are currently used in a closed circuit for obtaining virgin heavy water.

The technical characteristics of the synthesis reactors and the possibility of producing ammonia and fertilizers at an industrial scale, either individually or along with the production of heavy water, have generated appeal for both domestic and international investments in the Patagonian region.

source: www.ensi.com

Requirement for level switches

Float chamber test conditions

Installed level switch types

Bachofen has delivered 96 units of level switches and float
chambers.

ANSI cl.   300, To max.   80°C
ANSI cl.   300, To max. 221°C
ANSI cl. 1500, To max.   65°C
ANSI cl. 2500, To max. 120°C

Why Trimod´Besta?

Why Trimod´Besta?

Bachofen was the only supplier who was able to offer explosion proof switches and float chambers acc. to ANSI cl. 2500 and had the knowledge to manufacture and to test the float chambers acc. to the customers specification.

Palm oil production in Malaysia

Application information N° 502

What is palm oil?

Palm oil and palm kernel oil is an important and versatile vegetable oil which is used as a raw material for both food and non-food industries. Obtained from the fruit (both the flesh and the kernel) of the oil palm tree, it contributes to the economic development of the producing countries and to the diets of millions of people around the world. Oil palms can grow 20 metres tall with leaves up to 5 metres long. They bear clusters of fruit all year long, with each fully matured cluster weighing up to 50 kg. Oil palms are highly efficient oil producers, with each fruit containing about 50% oil. As a result they require ten times less land than other oil-producing crops. Palm oil and palm kernel oil are entirely GM (Genetically modified) free. Vegetable oil production around the world totals over 144 million tones per year, of which over 47 million tones is palm oil. Along with soy oil, palm oil makes up 60% of world production. From the 1990s to the present time, the area under palm oil cultivation had increased by about 43%. Today, seventeen countries produce palm oil, though Malaysia and Indonesia account for 85% of global palm oil production, where 4.5 million people earn a living from palm oil. The top five producing nations are Indonesia, Malaysia, Thailand, Nigeria and Colombia.

sunflower seed oil pattern factory warehouse store food background

Requirement for level switches

Installed level switch types

Why Trimod´Besta?

Why Trimod´Besta?

Withstands the high operating temperature of 250°C (tank) and 300°C (production process) and guarantees for reliable control.

Pulp and Paper Industry

Application information N° 503

Pulp reactor plant application

To manufacture paper, fibrous material is used which is temporarily stored in a pulp reactor far away from the production line because the pulp and its evaporations are highly aggressive. Trimod´Besta Level Switch acts as high level alarm at the top of the reactor in operating conditions of 6 bar and hundred 100°C and withstands the highly aggressive compacted vapor of the pulp. In the high level safety required process, the operators have the possibility to use SIL1 or SIL2 Trimod´Besta Level Switch which are SIL3 capable according to process owners calculation.

Installed level switch types

EN/DIN flange PN16 DN80 Hastelloy C
SIL2, SIL3 capable Standard execution for temperatures up to 150°C

EN/DIN flange PN16 DN80, Hastelloy C
SIL1, SIL3 capable Standard execution for temperatures up to 150°C

Why Trimod´Besta?

Why Trimod´Besta?

The Trimod´Besta level switch assures the plant operator of a reliable signal at any time with the SIL safety certificate.
Easy handling of spare parts due to the three-modular switch design. The switching module can be replaced without interruption or dangerous opening of the reactor.
Other benefits include technical support in finding the right customer solution based on their installation plans. 3D computer models can also be supplied in case of secrecy.

Références Gestion des eaux

Vacuum waste collection system

application information N° 601

Application

A worldwide acting manufacturer of vacuum toilet and waste water treatment systems for ships and trains has used Trimod´Besta switches for more than 20 years. They use our level switches for a critical application in waste collecting tanks under vacuum conditions. Thousands of switches are on duty in
ships and trains around the globe.

Type A 01 051E15 is a standard level switch with a modified bellow assembly designed for use in sewage tanks under vacuum conditions.

The new vacuum tank unit heavy duty series is a vacuum tank solution for civil and military applications, in which the traditional method is enhanced by new pump technology. Energy consumption of the vacuum tank units is reduced by more than 50% compared to the competing technology. An extra vacuum reservoir and powerful pumps make complex new piping designs possible on large vessels even with only one vacuum generation unit. In vacuum tank units separate discharge pumps feed waste water mixing tanks in batches in combination with advanced treatment solutions. The tank units now require less maintenance, also because of the very robust Trimod´Besta level switches.

Requirement for level switches

Installed level switch types

E15: describes application specific modification

Why Trimod´Besta?

Why Trimod´Besta?

Unique reliability combined with high quality guarantee undisturbed operation for years under vacuum conditions. No service costs occur.