Custom HVAC and Filtration Systems for the Rail Industry
SPECIALIST MECHANICAL ENGINEERS
TURNKEY MECHANICAL SYSTEMS/ ENGINEERING HVAC EXCELLENCE/ LIFE-SUPPORT SYSTEMS/
Specialist Mechanical Engineers (SME) is a South African company specialising in custom industrial, rail and military heat transfer, ventilation, air conditioning and filtration systems for use in adverse environmental conditions.
SME prides itself on having supplied products for over three decades, including more than 1,500 qualified coach and loco systems in numerous designs for various applications within the rail industry.
Designs include stand-alone modular roof mount, front-panel mount, ruggedised split and under-sling environmental control systems (ECS) for drivers, sitter and sleeper cabins, cooling of equipment, walk-in freezers, under-counter fridges and high capacity fast freezers. These custom train HVAC systems can be found in locomotives and coaches, including 6E/18E, 7E, 9E, 11E, Diesel 39 Loco, metro 10M5, ShoshalozaMeyl, Blue Train and PelaPepa.
Locomotive Cabin Air Conditioners
Units are generally of modular design for service exchange within 30 minutes and can be front-panel mounts or packaged roof units. Split designs are integrated with under-sling condensing units or installed in the motor room behind the cabin where required. Cabin Evaporators of split units can be wall or floor-mounted modules or custom integrated into the driver's console.
Coach/ Saloon HVAC Systems
Multiple modular or split units can be offered for saloon ventilation and air conditioning, or single roof mounted to suit specific car designs. The latest technology, high-efficiency scroll compressors, is used in tandem for redundancy and effective capacity control per load. Evaporator-integrated elements, separate heating or reverse cycle heat pump design can supply heating.
Special fresh air filtration modules can be added for heavy-duty environments, where self-cleaning cyclone cartridges ensure at least 95% clean air to occupants.CO? sensors add to energy-efficient designs for dense metro applications to adjust volume flow and cooling capacity to actual levels required.
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Extreme Temperature Reliability
All units for rolling stock are developed to operate reliably under extreme temperatures, humidity, shock and vibration, and dusty environments. All units are performance tested in our climate control room and vibration to live up to this standard. EMC is tested where necessary to ensure optimum performance and compliance with the relevant specification and procedures.
Efficient Power Management and Communication Interface
Intelligent control allows for efficient power management and communication interface options, such as CANbus or custom protocol to the train central management system. Bluetooth and USB links enable the download of system history and error logging to reduce fault-finding time and potential downtime. The units are also well protected against extreme supply power and phase variations.
Product Support and Spare Parts
SME offers comprehensive product support with detailed documentation and reliable spare part availability for up to 15 years if required. In South Africa, we have established our own dedicated support facilities in Pretoria, Johannesburg, Cape Town, East London, Durban, Richardsbay, Kimberly, Nelspruit and New Castle.
SME strives to deliver HVAC products which are: