Strategic Placement: Where Steam Traps Are Used
A steam system is only as strong as its weakest link.
Even the best-designed boiler plant will struggle if condensate is allowed to pool in the distribution lines or process equipment.
Steam traps are the "drainage officers" of the system, strategically placed to ensure that only high-quality, dry steam reaches the point of use.
Steam Mains and Drip Legs: Protecting the Distribution Line
The first place you will encounter steam traps is along the distribution piping itself. As steam travels from the boiler to the factory floor, some of it naturally loses heat and turns back into water.
Drip legs are installed at regular intervals (usually every 30 to 50 meters) and at the bottom of any vertical rises.
A steam trap placed on a drip leg removes this "transit condensate" before it can pick up speed and cause water hammer. For these high-pressure, low-load applications, thermodynamic or small mechanical traps are often the preferred choice.
Steam Tracing and Jacketed Vessels: Maintaining Temperature
In many industries, pipes carrying thick or viscous liquids (like oil or chocolate) need to be kept warm to keep the product flowing.
This is done through "steam tracing"—small steam lines run alongside the product pipe—or "jacketed vessels," where a layer of steam surrounds a tank.
Because these applications focus on maintaining a steady temperature rather than rapid heating, thermostatic steam traps are frequently used here.
They can be set to hold back the condensate until it has given up a specific amount of heat, making the process incredibly energy-efficient.
Process Equipment and Heat Exchangers: The Heavy Lifting
When steam is used to heat a secondary fluid—such as water in a heat exchanger or air in a drying coil—it condenses very rapidly.
These "process" applications involve high volumes of condensate that must be removed immediately to prevent "stall," where the equipment fills with water and stops heating.
In these scenarios, high-capacity mechanical float traps are the industry standard.
They respond instantly to the rising water level, ensuring the heat exchanger remains full of "live" steam and continues to operate at peak thermal efficiency.
Specialised Applications: Autoclaves and Sterilisers
In healthcare and food processing, steam is used for sterilisation inside autoclaves.
These systems are sensitive to air; if air is trapped inside, the temperature won't reach the required level for sterilisation.
Steam traps used here must have excellent air-venting capabilities.
Thermostatic traps or float traps with internal thermostatic air vents are essential in these environments to ensure that "cold spots" don't compromise safety or product quality.
The Importance of Correct Selection
Each of these locations has different demands—varying pressures, fluctuating loads, and different start-up requirements.
This is why having a full range of trap technologies is essential.
Selecting the correct trap doesn't just keep the water out; it ensures reliable operation under every possible condition.
By matching the steam trap to the application, you reduce mechanical stress across the system, prevent costly downtime, and ensure that every pound of steam produced is doing useful work.
If you're looking to learn more about the industry, visit British Flow Control.