Insights on valve positioner technology, process automation, and industrial control engineering from POWERFLOW's technical team.
POWERFLOW successfully concluded its participation in KIOGE 2026, held from September 30 to October 2, 2026, in Almaty, Kazakhstan. During the three-day exhibition, POWERFLOW presented its intelligent valve positioner solutions at Booth 9-037, connecting with visitors and industry professionals from Kazakhstan and other international markets. As an important oil and gas industry event in the […]
Control valve oscillation—also called hunting, cycling or valve position instability—can cause process-variable fluctuations, piping noise, accelerated packing and trim wear, and unreliable control. The valve stem may make rapid small movements, move in a repeating cycle or drift away from the requested position. The cause is not always the valve itself. Oscillation can originate in […]
Valve positioners are critical to accurate and stable control valve operation. However, when a valve does not move, oscillates around the setpoint, responds too slowly, fails calibration, or loses communication, the positioner itself is not always the root cause. Many field problems are actually related to the control signal, instrument air, actuator, valve mechanics, feedback […]
POWERFLOW is pleased to announce that we will be exhibiting at KIOGE 2026 – the 30th Kazakhstan International Oil & Gas Exhibition and Conference, taking place from September 30 to October 2, 2026, at Atakent IEC in Almaty, Kazakhstan. Visit POWERFLOW at Stand 9-037. KIOGE is a major oil and gas industry event in Kazakhstan, […]
Selecting a valve positioner is not simply a matter of choosing a 4–20 mA or “smart” model. The positioner must match the valve motion, actuator action, travel, pneumatic capacity, mounting interface, control system, environmental conditions, hazardous-area requirements, and required fail behavior. A mismatch in any one of these areas can result in a positioner that […]
“4–20 mA + HART” has become a common requirement in control valve specifications. However, HART is often misunderstood. Some users see it as a more advanced control signal, while others assume that adding HART automatically means the valve can be remotely controlled. In a typical point-to-point HART valve positioner application, the 4–20 mA signal carries […]
A smart valve positioner is a digital electro-pneumatic device that controls the position of a pneumatic control valve. It receives a command signal—typically 4–20 mA—from a DCS or PLC, compares the requested valve position with the actual position, and adjusts the pneumatic output to the actuator until the valve reaches the target position. Unlike conventional […]
I often see buyers start with a model name. That creates risk. A wrong positioner can cause delay, rework, and unsafe site use.1 I choose the right positioner by matching it to the valve, actuator, signal, site environment, certification need, and project risk. I do not start with the most advanced model. I start with […]
The short answer is no, but the real question is whether your valve setup needs one. I see this confusion all the time when customers ask us about positioners. They often think a control valve automatically comes with a positioner, or that every pneumatic actuator includes one built in. The truth is simpler: a positioner […]
Buyers often ask me for a simple count of positioner types. That question hides real risks—mismatched valves, project delays, and unfair quotes. Let me reframe it. There is no single fixed number of positioner types.1 The count changes depending on what you measure: control signal, actuator motion, communication needs, or explosion-proof requirements. Instead of memorizing […]
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