NDX

[ valves being parts of machines; valve parts as machine components; control valves being parts of machines; ] pneumatic [ and hydraulic ] valve [ actuators and ] positioners

electronic valve controllers; electric [, ] * and * electro-pneumatic [, electro-hydraulic and electronic ] valve [ actuator and ] positioners [ ; electronic sensors for measuring and controlling valve performance; signal processors; electronic switches and position transmitters for valves ]