STEAM TRAPS Introduction Steam Trap Selection Guidelines • Typical Applications
Jacketed Kettle As the name implies, Jacketed Kettles have a Jacket of Steam surrounding the outside of a Kettle. They are commonly used in the food and beverage industry for indirect heating of the contents in the kettle. This application demonstrates the use of the WT3003 Thermostatic Steam trap. Along with high condensate capacity handling and superior air handling capability, this trap can also operate at higher pressures. An advantage they have over F&T traps is that a single trap model operates over the entire pressure range making them easier to apply and maintain. It is typically recommended to install a thermostatic trap approximately 2 feet from process outlet piping to accommodate some back-up of condensate due to sub-cooling.
Steam
WT3003
Condensate
Rotating Steam Dryer Commonly found in the Paper Making industry, a rotating piece of equipment offers a unique challenge of removing the condensate. Steam inside a rotating drum cylinder is used to heat product such as sheets of paper over the outside surface of the drum. Since the drum is rotating, the trap must be positioned above the condensate collection point. The steam pressure inside the drum pushes the condensate up through the pipe to the steam trap. If steam enters the tubing, it will “Steam Lock” the trap by causing it to close which in turn causes the condensate to build up inside the rotating drum. Since the pipe line is surrounded by steam, it may take an extended length of time for the steam in the pipe to dissipate. By using the Steam Lock Release feature, a small amount of steam is continually discharged thru the seat, allowing the condensate to continually reach the steam trap. This steam lock release feature is available on ALL F&T and Thermostatic traps and should be considered on this type of application.
Rotary Coupling
Rotary Coupling
FTE Series with Steam Lock Release (SLR)
Rotating Drum
Steam
Trap Positioned Above Condensate Collection Point requires SLR
Condensate Collection Point
Steam
Steam
Steam
AIR FLOW
Multi-Bank Air Heating Coils / Air Handling Unit (AHU) For certain Industrial Heating and Drying applications, several Air Heating coils of various sizes may be set up in series to accommodate the process. The heat load of each coil should be taken into account when sizing the steam traps. It’s preferable to have a separate steam trap on each individual coil.
WFT Series
WFT Series
FTE Series
Condensate
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www.watsonmcdaniel.com •• Pottstown PA • USA • Tel: 610-495-5131
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