Thermodynamic Design
Orifice Design
This type of steam trap has no mechanisms to modulate and control the capacity of the trap. The trap has only a small fixed orifice which is sized by the manufacturer.
Applications:
Main Drip
Tracing
Pressure Ranges
0-1500 psig
Size Ranges
1/2"
3/4"
1"
1 1/2"
2"
Thermodynamic
Thermodynamic traps work on the difference on dynamic response to velocity change in flow of compressible and incompressible fluids. It controls the discharge with a one moving part, a metal circular disc. This design is essentially a "time cycle" device and does not respond to load variations. Every time this design cycles 0.032 lbs. of steam is lost.
Applications:
Main Drip
Tracing
Pressure Ranges
20-600 psig
20-1000 psig
20-1800 psig
Size Ranges
1/2"
3/4"
1"
1 1/2"
2"
Impulse
Impulse traps work on the difference on dynamic response to velocity change in flow of compressible and incompressible fluids. It controls the discharge with a one moving part, a metal circular piston, with a sensing orifice tapped down the middle. This sensing orifice causes great losses of live steam (5% of published capacity) when loads are low or in superheat conditions.
Applications:
Main Drip
Tracing
Pressure Ranges
150-1500 psig
300-2500 psig
300-4500 psig
Size Ranges
1/2"
3/4"
1"
1 1/2"
2"