LDVTs - FOR SPOOL OR POPPET POSITION SENSING IN HYDRAULIC VALVES

摘要

In the fluid power industry, Linear Variable Differential Transformers (LVDTs) are used to measure spool position in two-stage hydraulic valves where there is a need for proportional position feedback between the second stage main spool and the input to the first stage pilot valves current driver. The feedback provided by the LVDT permits the main spool of the valve to stay in position, providing a specified flow through the valve at the operating pressure.