(Photo courtesy Sonotec Ultrasound Solutions)
Steam Trap Survey
Several industries rely on steam for heat, and also as a driving force for mechanical power. Industries like breweries, hospitals, food processing, universities, and laundry services rely on a system boiler to get their needed steam. But for this, boilers need functional steam traps to work properly.
Steam traps have two main purposes: they filter out condensed steam and non-condensable gases without letting the steam escape. The condensed steam is formed once it loses its energy from heating the unit. Once it escapes and goes back to the system boiler, it can cause loss of energy and physical damage. This is why it’s essential to conduct regular steam trap surveys to avoid this from happening.
How Do Steam Traps Operate?
The primary function of steam traps is to separate steam from condensate and air. There are three different types of steam traps, based on their mechanisms and purpose. They are mechanical, thermostatic and thermodynamic traps.
Mechanical traps perform according to fluid density changes, while thermostatic traps operate based on fluid temperature changes. Thermodynamic traps, on the other hand, function according to changes in fluid dynamics. Here is a closer look at all the different types of steam traps.
Mechanical Traps
This type of steam trap senses the difference in density between the condensed steam and steam. Mechanical traps have a float that detects any changes in the density. The most common mechanical trap is the inverted bucket.
Thermostatic Traps
The working principle of these steam traps is the temperature difference between the steam and condensate. They have a temperature-regulating element inside the trap to detect any temperature changes. The thermostatic element acts as the valve. It allows the condensate to pass at a lower temperature, but closes when the temperature increases in order to trap steam.
Thermodynamic Traps
These traps rely on volumetric and pressure differences. Thermodynamic traps have one moving part that discharges the condensate when hot. It closes when the pressure in the chambers increases to trap steam.
Benefits of Steam Trap Surveys
Steam traps surveys refer to audits of the steam traps on your site. And, there are several reasons why they are essential. For instance, steam trap surveys offer a clear insight into the condition of your system boilers. They help you avoid costly issues that might occur if repairs aren’t made. Instead of replacing your boiler immediately, you can use steam trap surveys to spot the issues.
What Does a Steam Trap Survey Involve?
The steam trap survey starts in the heart of the steam system, which is the boiler. Various equipment, like an infrared pyrometer, a thermal imaging camera, ultrasonic testing device, and appropriate personal protective equipment, will be used during the survey. Sometimes trap location tags are used as well, but only when requested.
In general, here’s what happens during the survey:
- A technician measures the temperature on either side of a steam trap to ensure accuracy.
- Steam tables will be used to infer line pressures from measured pipe temperatures.
- Experts will also use ultrasonic testing equipment to monitor the performance of the traps.
- Finally, they will note the size, fitting type, and trap type.
Steam Trap Survey Made Easier
For optimal boiler maintenance, let a reliable company do the work for you. Bay City Boiler conducts steam trap surveys, and other effective maintenance methods, to keep your boilers functioning properly. Schedule an appointment today by calling us at (800) 225-1348.