Back Pressure Turbines are types of steam turbines used in connection with industrial processes where there is a need for low or medium pressure steam.
The high pressure steam enters the back pressure steam turbine and while the steam expands – part of its thermal energy is converted into mechanical energy. This mechanical energy is used to run an electric generator or mechanical equipment, such as pumps, fans, compressors etc.
The BT 4 Back Pressure Turbines are best known as the first step towards co-generation, as it provides a stepping- stone to understand the basics of balancing steam and power. Induction generator based examples offer an even greater degree of freedom for users that want to synchronise their machines with the grid. These turbines have been serving our customers since the year 2001, and greater than 300 are in active service today.
BT-4 is a Curtis design turbine that has a low CF rotor. The rotor is supported on both sides by high- speed bearings.
This high efficiency single stage turbine features a large wheel diameter, for improved efficiency. Nozzle governing with 3 valves ensures superior efficiency at part-load conditions. An integral Woodward / RE governor ensures simple operation and high reliability. Suitable for use with Synchronous and asynchronous generators.
Its flexibility has made it a popular choice for mechanical drive applications. A combination of pressurised and ring lubrication along with between bearings shaft design between has ensured full API 611 compliance and 612 compliance (with exceptions). The unique combination of high efficiency, operational flexibility, moderate acquisition cost and minimum maintenance has found wide acceptance in the sugar, calcium carbonate and textile industry.
The 6SS is a large diameter Single Stage Curtis wheel design. The rotor shaft is supported by double bearings.
