AS81/E
complete version
Marine Electrohydraulics
Stainless steel & intrinsic safety systems
Fig. 1 - LNG carrier
Stainless steel electrohydraulics is one of the most advanced and modern automation
technology for Marine applications as driving Propulsion, Stabilizers, Gangways, Hatches
and actuator controls of processing valves. Specifically designed to satisfy the automation
needs of shipboard installation and the tough demands of the off-shore applications, Atos
stainless steel systems are currently used in thousands applications (Fig. 1), with “naval
certifications” released by inspecting agencies such as ABS, BV, DNV, RINA, GL, CCS on
request.
Power packs are manufactured by Atos system division, with stainless steel frame, tanks
and piping to withstand over 200 hours salt fog tests according to ASTM B117 (Fig. 2).
Fig. 2 - Stainless steel power pack
All components and accessories are compatible with biodegradable water-based fluids,
thus respecting the environmental regulations regarding pollution and fire risks. Particular
care is taken for the ergonomic positioning of all components, to make easier the
maintenance in ship rooms; in addition the hydraulic power generation is with redundant
vane or piston pumps and with power limitation control to reduce energy consumption
and avoid overloads.
Specific solutions for reducing the noise level such as silent couplings, shock absorbers,
flexible hoses and silent cabins are well-adjusted in the systems.
Stainless steel cylinders (Fig. 3) fit the modern marine applications thanks to their high
resistance in aggressive ambient (>1000 hours in salt spray), particularly for vessels roll
stabilizers and trailing edge flaps on hydrofoil boats.
Fig. 3 - Stainless steel cylinder
Standard cylinders with nikrom rod treatment (>350 hours in salt spray) actuate tender
platforms and shell doors of merchant and cruise ships, fins and steering systems on
vessels as well. For application in hazardous areas, they are also available with ATEX
94/9/CE certification, according to EN 13463.
Stainless steel ex-proof valves (Fig. 4) with rugged inoxidizable design to withstand
corrosive environments (>800 hours in salt spray) and with ISO mounting surface patterns
for a compact and efficient design of the hydraulic system. They are explosion-proof and
multicertified according to ATEX, IECEx and EAC standard or cULus. Size 06 valves are
also conformed to SIL Safety Integrated Level according to IEC 61508 (TÜV certified).
Intrinsically safe on-off solenoid valves (Fig. 5) are designed to ensure full functionality
Fig. 4 - Inoxidizable electrohydraulics
with low power supply to avoid the possibility to strike an explosion, with certification
according to ATEX 94/9/CE and IECEx Group II and I for surface tunnel or mining plants.
Several worldwide naval applications like LNG (Liquefied Natural Gas) carriers and FPSO
(Floating Production Storage and Offloading) prove their high reliability and durability. To
limit the max input current, the valve’s solenoids must be powered through specific
certified “safety barriers”.
The whole range of Atos “marine” electrohydraulics is also available in low temperature
execution to withstand extreme low temperature in Arctic areas down to -60°C (standard
certification -20°C).
For further information look at www.atos.com
Fig. 5 - Intrinsic safe valves & barriers
AS81/E
synthetic version
Marine stainless Electrohydraulics
Stainless steel cylinder
Modern shipboard installation as well as demanding off-shore applications make large use of advanced automation technologies to
improve motion control architecture and relevant performances.
The wide range of Atos stainless steel electrohydraulics is specifically designed to fulfill Marine automation requirements:
Stainless steel ISO valves - explosion-proof multicertified according to ATEX, IECEx and EAC standard or cULus - with ruggedized
inoxidizable design to withstand corrosive environments (>800 hours in salt spray)
Intrinsically safe on-off solenoid valves - ATEX and IECEx certified for surface plants with low power supply to avoid explosion triggers;
they have to be powered through specific certified “safety barriers”
Stainless steel cylinders - ISO 6020-1 round head with high resistance in aggressive ambient (>1000 h in salt spray)
Power packs - with structures, tanks and piping in stainless steel to withstand over 200 hours salt fog tests and naval certifications from
leading agencies such as ABS, BV, DNV, RINA, GL, CCS.
Atos “polar” electrohydraulics - low temperature execution - withstand temperatures lower then -60°C.
For further information look at www.atos.com