The intelligent positioner SIPART PS2 is your first choice when it comes to precision control of valves in different industries. As a expert diagnostic tool in our process instrumentation portfolio,it ewill support you with security process control, giving you real-time information about valve status. Cost efficiency driven by reduced maintenance. Reliability in emergency situations. One of the many benefits of this positioner is the "Partial Stroke Test(PST)", a very useful method of detecting possible faults or failures of on-off-valves.