Steam Traps - Back Pressure and Capacity
Steam trap capacities are reduced if there is a back pressure in the condensate system. A back pressure can be the result of excessive flash steam generation.
Back pressure and reduction in steam trap capacities:
| Inlet Pressure | Back Pressure (%) | |||
|---|---|---|---|---|
| (psig) | (bar) | 25 | 50 | 75 |
| 5 | 0.35 | 6 | 20 | 38 |
| 25 | 1.75 | 3 | 12 | 30 |
| 100 | 6.9 | 0 | 6 | 25 |
| 200 | 13.8 | 0 | 5 | 23 |
Related Topics
• Design of Control and Safety Valves
Sizing and dimensions of control valves & equipment in steam and condensate systems.
Related Documents
Flash Steam Generation - Imperial Units (psig)
When condensate passes steam traps - flash steam is generated.
Flash Steam Generation - SI-units
When condensate leaves the steam traps - flash steam is generated. Amount of flash steam generated at different pressures - kN/m2.
Properties of Saturated Steam - SI Units
Saturated Steam Table with steam properties as specific volume, density, specific enthalpy and specific entropy.
Steam Flash Generation (bar)
The amount of flash steam generated depends on steam pressure and pressure in the condensate lines.
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An introduction to the basic design of steam heating systems.
Steam Trap Selection Guide
Steam trap selection guide - Float & Thermostatic, Inverted Bucket, Bimetal Thermostatic, Impulse and Thermodynamic Disc steam traps.
Steam Traps - Safety Factors
Selection of steam traps and their safety factors.