There are two main types of mechanical traps: float traps and inverted traps. Float traps typically use a sealed spherical float, while inverted traps are flipped with a floating cylindrical cup. In a float trap, the position of the float is directly affected by the level of condensation in the trap. The float responds to the condensate flow and opens and closes the valve for corresponding compensation.

The float trap has two basic designs for the float trap: lever float and free float.

In the lever floating design, the float is connected to the lever that controls the valve. When the condensate enters the trap, the float will float and move the lever, causing the trap to open. However, due to the limited movement of the lever arm, the valve head often remains in the path of condensate flow, which may result in additional pulling force for closing the valve under high flow conditions.

In the TLV free floating trap, the float is not connected to the lever and the float itself acts as a valve for the trap. The free float can rise independently from the orifice, allowing the condensate to escape unimpeded. In addition, the free-floating natural rotation allows an almost unlimited number of contact points to seal the orifice, significantly reducing local wear on the valve.
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