Halliburton Company launched the new EcoStar electric tubing-retrievable safety valve (eTRSV). This second-generation product ...

This online article, “ Guide to heavy-duty actuator springs and valves springs,” shows how springs in process valves and actuators are the “sil ...

Lovetone pedals mastermind and tone-meister at large Dan Coggins shares his tips on getting the best from the tube amp in ...