Thermostatic Steam Traps
Thermostatic Traps, unlike their thermodynamic counterparts, work in response to the surrounding steam temperature instead of pressure differences in flash steam and water. Thermostatic traps are best utilized in scenarios that provide fixed temperature and pressure as they are unable to respond rapidly to changes in temperature. Similar to thermodynamic traps, thermostatic traps are often conservatively sized while still capable of handling a healthy amount of condensate.
When placed in favorable environments, they are able to efficiently separate condensate from steam and operate more efficiently than their counterparts in start up conditions. They are also a good choice for industries that utilize low to medium condensate loads and are, on average, a cost efficient solution while maintaining a reduced initial cost.
There are several trap types under the thermostatic category, including Bimetallic, and Balanced Pressure traps.
Bimetallic traps make use of the same function that powers heating thermostats. Utilizing a strip of metal that has two dissimilar metals welded together, the bimetallic component deflects when subjected to changes in temperature. The change in temperature caused by steam operates a valve and closes the trap, while the presence of condensate and other gases will allow the trap to open.
Balanced Pressure Traps
Balanced Pressure Traps are an engineering evolution based on the liquid expansion model. These traps contain a capsule that houses a combination of water and a specialized liquid with a boiling point below water. When not subjected to heat, the capsule stays in a relaxed state and leaves the valve in an open state, allowing air to vent consistently. Once subjected to heat, the vapor pressure inside the capsule forces it to expand, closing the valve.
For more information on the full range of products available at A.L.B. Industrial Supplies Inc., or to find the right steam trap for your facility, get in touch with us at 718-253-5343.