In a world where transportation is constantly changing, evolving and delivering new challenges and opportunities – companies need to be competitive, to stay at the leading edge and provide more than ever before. Sigma is a global leader In the field of track air conditioning providing solutions from the chill of Switzerland to the heat of Dubai. Since our first rail air-conditioning systems designed in the 1960’s for the harsh Australian conditions of the Perth to Sydney line to our cutting edge solutions now being delivered around the world, there is not a single Rail air-conditioning application that Sigma engineers have not designed for.
Sigma aims to understand, meet and exceed the unique requirements of modern track maintenance vehicle. We understand that heating or cooling operators and equipment has to take into account air distribution, temperature gradients and the many existing components and systems that form part of the railway vehicle, whatever the requirement Sigma delivers.
As part of the Knorr-Bremse group we have the operational and financial strength to reliably deliver on any project. With life cycle responsibility of our solutions Sigma will be here for the long run satisfying operators with total air comfort, of high quality, value solutions that meet ever changing environmental demands. Sigma is the right choice for any track maintenance air-conditioning project, anywhere in the world.
Drivers' comfort is an important aspect to ensure the safe operation of rolling stock networks globally. Sigma's locomotive driver's cab air conditioning systems have been designed to operate in some of the harshest conditions both around the world and in Australia where outside temperatures reach as high as 55°C.
Freight locomotives are normally designed to deliver high starting tractive effort and high sustained power and travel over long distances. Sigma's HVAC solutions provides comfortable internal environment for those long journeys.
Track Maintenance Vehicles
Maintenance of the railway infrastructure is mandatory to provide a safe service. Damage or broken catenary will cause transport interruptions and economical drawbacks. Sigma's track maintenance cab air conditioning systems have been designed to operate in some of the harshest conditions.
Our E-Series air conditioner, 12VDC & 24VDC, has been designed and developed for cost effective medium duty off road applications. Refined to suit the application of vibration, dust and high ambient to suit rubber tyred quarry, construction and mobile fleets, where all components are readily available and provide reliable service and ease of service.Read more
Driver’s comfort is an important aspect to ensure the safe operation of rolling stock networks globally. Sigma’s locomotive driver’s cab air conditioning systems have been designed to operate in some of the harshest conditions around the world, where outside temperatures reach as high as 50°C (122°F). This reliable air conditioning system is the result of Sigma’s striving for engineering excellence, over 65 years of experience in locomotive air conditioning industry and continuous development. It operates with environmentally friendly R134a refrigerant, comprisses DC Operating Fan Motors (evaporator, fresh air and condenser fan motors) operate directly on 72VDC supply input, includes a PLC controller and is able to run in service at extreme high ambient temperatures of
Our M-Series heavy duty mains powered air conditioners are designed to provide controlled space conditions for crane operators cabins, control rooms, switch rooms and other applications where heavy shock loads, vibration and dust laden corrosive environments are experienced and ambient temperatures approach the extreme.Read more