| Drawings by Category | Flowserve Limitorque wiring diagrams are listed for most standard and optional electrical/electronic configurations of currently supported products. If the drawing is not found listed, please contact [email protected] with the Limitorque order number and serial number of the unit in question.[PDF] USER INSTRUCTIONS - Flowserve Flowserve Limitorque actuators are available with a wide range of standard and optional features. Be aware of these features and their role in the setup and operation of the actuator. 1.1 Purpose This Installation and Maintenance Manual explains how to install and maintain the L120-10, L120-20, and L120-40 actuators.