What type of trap is commonly used with radiators or convectors?

The correct answer is thermostatic traps, which are commonly used with radiators or convectors due to their ability to effectively control the release of steam and maintain the desired temperature. Thermostatic traps work by using a temperature-sensitive element that expands or contracts in response to steam temperature changes. This mechanism allows for the automatic regulation of steam flow and condensate drainage, ensuring that the heating system operates efficiently.

In a heating system, the primary role of the trap is to remove condensate while preventing steam from escaping. Thermostatic traps are especially beneficial as they adjust based on the temperature of the steam and the condensate, providing optimal control over the heating process. This is crucial for preventing water hammer and other issues associated with improper condensate drainage.

Other types of traps, like mechanical or float traps, may have their specific applications, but they are less effective in automatically adjusting to fluctuating temperatures as required in radiator and convector systems. Vacuum traps are designed for a different operational purpose, specifically for removing air from systems that operate under a vacuum, rather than for managing steam and condensate in traditional heating applications.