What can ensure proper operation of a duplex strainer?

Proper operation of a duplex strainer is ensured primarily by checking for gasket leaks. Gasket leaks can significantly affect the performance of the strainer, as they might allow unfiltered debris to bypass the strainer or create pressure drops in the system. Ensuring that the gaskets are in good condition and properly sealed is crucial for maintaining the integrity of the strainer and the overall system it supports.

While regular maintenance, like cleaning and inspecting the duplex strainer, is important and contributes to its effective operation, it is the condition of the gaskets that directly impacts the immediate functionality of the strainer. Similarly, while replacing fuel filters frequently helps to maintain the cleanliness of fuel lines and prevent contaminants from entering the system, it doesn't specifically address the potential issues arising from gasket integrity in the strainer itself.

Installing a sight gauge can be advantageous for monitoring the strainer’s condition, allowing operators to visually inspect flow conditions, but it doesn’t ensure proper operation on its own. Its purpose is more about providing information than maintaining operation.

Therefore, focusing on gasket leaks is the critical factor in ensuring the effective operation of a duplex strainer, as it directly relates to the system’s ability to filter out contaminants properly.