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Steam Traps and Steam Trapping
How steam traps work and why steam traps are necessary. All is explained in this block, along with the different types, where they are used, and how they are selected.
Air venting theory and applications are touched upon, along with steam trap maintenance.
The duty of a steam trap is to discharge condensate, air and other incondensable gases from a steam system while not permitting the escape of live steam.
The need for steam traps, considerations surrounding their operation, basic modes of operation and relevant standards are all covered in this tutorial
Thermostatic traps operate in response to the surrounding steam temperature. The operation and benefits of 3 different types are considered here - liquid expansion traps, bimetallic and balanced pressure
thermostatic traps. Each operates in a different way and is suited to specific types of application.
Mechanical steam traps rely on the difference in density between steam and condensate in order to operate. They can continuously pass large volumes of condensate and are suitable for a wide range of process applications.
Types include ball float and inverted bucket steam traps. This tutorial considers the operation and benefits of both types.
Thermodynamic steam traps have a unique operating principle which relies on the dynamics of water and flash steam. They are simple, robust and reliable and
can operate up to very high temperatures and pressures. Their construction, use and benefits are detailed here.
Application type, system design and maintenance needs will influence the performance and selection of steam traps.
Factors such as waterhammer, dirt, steam locking, group trapping, vacuum conditions and temperature control of processes are discussed in this tutorial.
Selection tables and advice on trap selection for a range of different processes are included in this tutorial, including steaming ovens, bulk storage tanks and autoclaves.
Selection tables and advice on trap selection for a range of different processes are included in this tutorial, including multi-bank pipe dryers and rotating cylinders.
Selection tables and advice on trap selection for a range of different processes are included in this tutorial, including calendars, garment presses, dry cleaning machines and tyre presses.
Selection tables and advice on trap selection for a range of different processes are included in this tutorial, including boiling pans, retorts, digesters, coppers, reboilers, evaporators and vulcanisers.
Selection tables and advice on trap selection for a range of different processes are included in this tutorial, including heat exchangers, radiant panels, unit heaters, air heater batteries and overhead pipe coils.
Selection tables and advice on trap selection for different types of steam mains, headers and off-takes are included in this tutorial, together with process vats and pressure reducing valve stations.
The presence of air has a devastating effect on steam systems and processes. The basic theory of air venting is explained in this tutorial, plus advice on air vent location.
Some of the many different applications for air vents are described in this tutorial, including steam mains, bypasses, jacketed vessels and rotating cylinders.
Other issues such as venting large volumes of air, group air venting and the substitution of thermostatic steam traps are also considered.
Indiscriminate maintenance of steam traps wastes money. This tutorial considers a planned approach to steam trap testing and maintenance, with recommended methods and equipment.
A large amount of inaccurate and misleading information has been written on this subject. This tutorial gives clear, accurate information regarding the energy consumption of different trap types.