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Read the latest powergen press releases...
Air shut-off valve gives engine safety in hazardous areas
June 2008
Tailored air shut-off valve gives Perkins a custom solution
March 2007
AMOT fuel valve duo combines gas turbine control and shutoff
February 2006
AMOT compressor control system offers big energy savings
June 2005
Thermostatic value designed for compressor lubricating oil
January 2004
Air shut-off valve gives engine safety in hazardous areas
June 2008
AMOT has added an ATEX approved electric 250mm (10in) hazardous area model 4261 emergency engine air shut-off valve to it standard SpeedTrap range, protecting bigger diesel engines from the risk of dangerous and damaging runaways when they burn hydrocarbon vapours or other combustibles even after their fuel source has been closed.
ATEX approved to EX II 3 G EExn IIC T4, zone II, the valve is fully controlled by a custom electronic control module preventing the solenoid from generating excessive surface temperature.
The valve retains all the features of the standard Model 4261 but has also been mechanically modified to comply with ATEX. Solid state sensing and control have increased reliability and robustness allowing easy interface to other controllers.
SpeedTrap valves can be used stand-alone or in complete runaway shutdown systems. They have a compact design with easy low-cost installation and a remote reset facility for more flexible control. An O-ring seal ensures positive shutdown of the air supply to an engine as required for safety.
In operation the control panel monitors engine speed and send a shutdown demand to the valve if it exceeds a set limit. A valve position feedback signal confirms valve actuation.
Firsts designed to match the size and power of a V cylinder engine required for offshore power generation, the 250mm (10inch) diameter valve is ideal for oil field and on/offshore sites and a range of other demanding applications.
Tailored air shut-off valve gives Perkins a custom solution
March 2007
AMOT has proven its custom valve solutions capabilities in tailoring a new air intake shut-off valve for the Perkins 4012 and 4016 diesel engines. The Stafford-based company required more power from its 4012 engine and decided to upgrade from a bi-turbo charger to a quad-turbo charger arrangement for this engine configuration, which is used mainly for electrical power generation.
Preventing potentially destructive run-away caused by hydrocarbon vapours and mechanical failure, the existing engine used two AMOT SpeedTrap 4262M air shut-off valves, with each attached to a turbo-charger by way of a suction line comprising pipes and hoses.
The design remit given to AMOT was not only to accommodate two turbo chargers per valve, but also to do this in a compact, easy-to-assemble design. The compact design was required to ease serviceability of components around the radiator and ease of assembly was required to improve factory efficiency.
AMOT fuel valve duo combines gas turbine control and shutoff
February 2006
The AMOT 8402 gas turbine fuel control valve has been specially developed for efficient metering on virtually any industrial or aero-derivative turbine and also can be combined with the model 4420 fuel shutoff valve to provide a complete control solution.
Designed to provide highly accurate and reliable turbine control, the 8402 valve has a fast operating speed and large 500:1 turn-down ratio that can allow a single unit to deliver fuel precisely from light off to maximum power. Its electric stepper-motor actuator can fully stroke the valve in only 250ms and eliminates the need for a hydraulic actuation system.
Accurate position measurement enables the valve to keep the turbine operating in its maximum efficiency range while maintaining the safety of the machine and the entire turbo-machinery train. Its digital optical encoder provides absolute repeatability of +/- 0.05% of stroke and carbon or stainless steel construction gives durability for long life.
AMOT's model 4420 turbine fuel shutoff valve can be linked with the 8402 control valve to provide a reliable cost-effective combined system for any turbo-machinery application. Compact and easy to install, its unique 'vent' port eliminates the need for separate bleed valves, which saves costs and simplifies piping.
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Thermostatic valve designed for compressor lubricating oil
January 2004
The AMOT Filterstat valve offers cost savings and performance benefits for screw compressor manufacturers by incorporating the features of a direct filter connection on the thermostatic valve for the lubricating oil system, as well as an optional integral differential pressure switch that indicates when the filter needs replacing.
Suitable for mixing or diverting applications, the valve is compact in size and designed to reduce cost by eliminating piping connections, and providing improved performance through having less potential leakage paths. It is ideal for compressor oil cooling systems in all environments.
Units have an body and Viton seals. Specifications include a flow rate of 2 to 8m3/hr with maximum 25 bar working pressure and control temperatures from 49 to 113°C.
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AMOT compressor control system offers big energy savings
June 2005
AMOT is exhibiting the new AirGuard Compressed Air Management System which offers compressed air energy savings of up to 35% at the Compressor & Systems China Exhibition, which takes place in Shanghai in July. Also shown will be the latest model S1 electronic compressor controller, which is powered by 24V, making it CCC compliant for the Chinese market.
Able to control up to 24 compressors in single or multiple set-ups, the AirGuard system controls target pressure within fine limits to maximise efficiency. It monitors any compressors for such factors as common alarms, oil temperature, bearing condition and service-due conditions and the Enersoft control and visualisation software allows remote monitoring and routine performance reviews, with operational cost reductions and quality improvements implemented directly from a PC screen. |
