Main Line Supply offers a complete valve actuation program to the process and mechanical industries. We specialize in quarter turn products, but offer linear control products as well. No matter the service, or application requirement, we will have a valve solution to fill your need. Our services include: technical assistance on valve and actuation sizing, mounting and testing of all units prior to shipment, and calibration services.  We also provide the installation of locking devices, visual indicators, and gear or chain operators. Our inventory of pneumatic and electric actuators include: Apollo, Worcester, and Elomatic. Along with our inventory of actuators we also carry Moniteur, Westlock, PMV, and Bernard position indicators and control devices