Foxboro 43AP-FA22N/PB-DF Pneumatic Indicating Controller – Product Description

Overview

The Foxboro 43AP-FA22N/PB-DF is part of the well-established 43AP Series Pneumatic Indicating Controllers, which are widely used in process plants that require reliable and flexible control. This instrument combines indication and control in a single device, giving operators clear visibility of process conditions while maintaining accurate set points. Moreover, the force-balance pneumatic mechanism ensures stable regulation across demanding applications, including pressure, temperature, vacuum, and differential pressure.

Engineers value the 43AP design because it supports multiple control modes and provides broad rangeability. In addition, its rugged construction and NEMA 3 enclosure allow dependable field installation in harsh or outdoor environments.

Technical Specifications

Model: 43AP-FA22N/PB-DF
Series: Foxboro 43AP Pneumatic Indicating Controllers
Type: Pneumatic Indicating Controller
Measured Variables: Pressure, temperature, vacuum, differential pressure
Control Modes: On-off, proportional (4–400%), proportional + derivative (0.05–50 min), proportional + reset (0.01–50 min/repeat), full PID, differential gap (1–100%)
Output Signal: 3–15 psi (20–100 kPa) pneumatic; gauge up to 30 psi (200 kPa)
Accuracy: ±0.25% of span (typical)
Span Adjustability: Wide range, up to 10:1
Calibration: On-line vernier adjustment
Options: Remote pneumatic set point, auto/manual transfer, batch function, Type 70 electric contacts, valve mounting
Operating Temperature: –40°C to +85°C
Humidity Range: 5% – 95% non-condensing
Protection Class: NEMA 3 enclosure
Country of Origin: USA

FAQ

Q1: What type of control mechanism does the 43AP-FA22N/PB-DF use?
It uses a force-balance pneumatic mechanism that ensures stable and accurate control.

Q2: Can this controller operate in outdoor or harsh environments?
Yes. Its NEMA 3 enclosure supports dependable operation under difficult field conditions.

Q3: Does the controller support PID control?
Yes. It offers full PID capability along with proportional, reset, derivative, and differential gap modes.

Q4: What pneumatic output does it provide?
The unit delivers a standard 3–15 psi (20–100 kPa) pneumatic output signal.

Q5: Is remote set-point adjustment available?
Yes. Optional remote pneumatic set point and auto/manual transfer features are supported.