YOKOGAWA PK-200-A33 Input/Output Electrical Converter

Product Description

YOKOGAWA PK‑200‑A33 is a Current‑to‑Pneumatic (I/P) converter from Yokogawa PK200 series. It linearly converts 4‑20 mA DC analog current signal from DCS system into proportional standard pneumatic pressure output to drive pneumatic control valves and actuators for process regulationYokogawa E…. Suffix A denotes 4‑20 mA DC input; suffix 3 stands for 1/4‑NPT female air connection and 1/2‑NPT female electrical connection. Dual built‑in input/output pressure gauges allow on‑site visual signal reading. Adopting electronic feedback control architecture, it delivers high conversion accuracy with minimal interference from on‑site temperature, humidity and vibration. Energy‑saving pneumatic design reduces air consumption. Epoxy‑coated housing supports pipe‑mount or wall‑mount installation; explosion‑proof variant is optional. Widely deployed as signal interface between DCS and pneumatic valves in chemical, power and oil‑gas process industries. New units and industrial replacement spares are commercially available.

2. Product Parameters

• Model: PK‑200‑A33
• Brand: YOKOGAWA (Yokogawa Electric, Japan)
• Product Type: I/P Current‑to‑Pneumatic Converter
• Input Signal: 4‑20 mA DCYokogawa E…
• Pneumatic Output: 20‑100 kPa (standard)Yokogawa E…
• Standard Supply Air Pressure: 140 kPaYokogawa E…
• Linearity: ±0.2% of spanYokogawa E…
• Hysteresis: 0.2% of spanYokogawa E…
• Repeatability: 0.1% of spanYokogawa E…
• Max Air Consumption: 4 Nl/min @ 140 kPa supply pressureYokogawa E…
• Output Air Capacity: 110 Nl/min @ 140 kPa supply pressureYokogawa E…
• Connections: Air port 1/4‑NPT female; Electrical port 1/2‑NPT female
• Accessories: Integrated stainless‑steel input & output pressure gauges
• Mounting: 2‑inch pipe‑mount / surface wall‑mountYokogawa E…
• Operating Temperature: ‑40℃ ~ +80℃ (general version)Yokogawa E…
• Housing: Epoxy‑coated aluminum alloy
• Weight: Approx. 2.8 kgYokogawa E…
• Product Status: Active process instrument; new units & replacement spares available
• Key Features: High‑precision I/P conversion, electronic feedback, low air consumption, built‑in pressure gauges, pipe/wall mounting, good environmental immunity, compatible with pneumatic actuators

3. Product Application

The PK‑200‑A33 I/P converter serves as signal interface between control systems and pneumatic actuators. Main application fields are listed below:

1. Petrochemical Plants: Convert DCS 4‑20 mA signal to pneumatic output for control valves to regulate flow, pressure and level in refining & chemical processes.
2. Thermal Power Plants: Auxiliary boiler control loops for pneumatic dampers and control valves for process parameter adjustment.
3. Oil‑gas Production & Gathering Stations: For hazardous‑area installations, driving pneumatic valve actuators for remote automatic regulation.
4. Water & Waste‑water Treatment: Pneumatic control valve loops in water plants for automatic flow and pressure control.
5. Paper‑making & Pharmaceutical Industry: Process‑system matching for pneumatic actuators for field signal transformation.
6. Legacy‑plant Maintenance & Retrofit: Spare‑part swap for failed I/P converters to maintain stable operation of existing pneumatic control loops.