Fixed temperature discharge steam traps
Overview
Spirax Sarco fixed temperature discharge steam traps use a liquid expansion device to discharge condensate at a preset fixed temperature. They are suited to specialist thermostatic duties where a defined discharge point is more useful than fully pressure-responsive operation or immediate mechanical drainage. Because they release condensate after a controlled amount of sub-cooling, they can be useful where the duty values predictable temperature behaviour and compact thermostatic operation over maximum immediate discharge capacity. This makes them a more application-specific choice within the wider steam trap portfolio rather than a general replacement for balanced pressure, ball float or thermodynamic designs. Used correctly, they help engineers apply a predictable temperature-based discharge rule where the process duty genuinely benefits from it, while keeping trap selection aligned to the actual heat-transfer objective of the application.
Related specialist thermostatic routes
Fixed-temperature discharge is a narrower thermostatic choice. If the duty needs pressure-responsive behaviour and stronger start-up venting, compare balanced pressure steam traps. Where a tougher thermostatic mechanism is preferred in harsher conditions, continue into bimetallic steam traps.
For the broader family view, return to steam traps.
Continue your specialist thermostatic trap selection
Fixed temperature discharge traps are best selected against the application duty, because their value comes from a specific discharge behaviour rather than broad all-round use.
Compare the wider trap portfolio
Return to the wider steam traps range when you need to compare fixed temperature discharge with other thermostatic, mechanical or thermodynamic trap types.
Compare thermostatic drainage approaches
Use balanced pressure traps when variable-pressure response and stronger air venting are more relevant than a preset discharge temperature.
Check duty suitability before selection
Review steam trap selection guidance when the main question is whether controlled sub-cooling at a fixed setting is suitable for the application.