Understanding a Single-Seated Balance Valve

Characteristics of a Single-Seated Balance Valve

A single-seated balance valve could be described as having cage-style trim that is used to provide valve plug guiding, seat ring retention, and flow characterization. It also involves a valve plug that moves inside a removable cage that holds down a seating ring.

Based on the options provided, the correct choice is B) 1, 2, as it accurately describes the features of a single-seated balance valve.

Operation of a Single-Seated Balance Valve

The cage-style trim in a single-seated balance valve plays a crucial role in guiding the valve plug and ensuring the retention of the seating ring. This design helps in flow characterization and improves the overall performance of the valve.

It is important to note that a single-seated balance valve does not divide the flow in half through two control ports, as mentioned in option 3. Therefore, the correct choice remains B) 1, 2.