Foxboro 43AP-PA46C/PB-AA Pneumatic Indicating Regulator

Foxboro 43AP-PA46C/PB-AA Pneumatic Indicating Regulator

I. Basic Information
Brand: Foxboro (now under Schneider Schneider)
Model: 43AP-PA46C/PB-AA
Type: Field-installed PID pneumatic indicating controller (Pneumatic Indicating Controller)
Life Cycle: The original factory has discontinued production. Spare parts for old oil and chemical plants are available (new inventory / dismantled second-hand)
Usage: Local pressure, temperature, flow, and level single-loop pneumatic closed-loop control, with output of standard 3–15 psi pneumatic signal to drive pneumatic control valves

Complete Interpretation of Model Segmentation (43AP-PA46C/PB-AA)
Front section 43AP-PA46C
43AP: Basic series = Pneumatic controller with local panel indicator
P: Panel-mounted installation (different from F for field pipe support installation)
A6: Control algorithm PID three functions (proportion + integration + differentiation)
Integral Reset: Adjustable from 0.01 to 50 minutes / times
Differential Derivative: Adjustable from 0.05 to 50 minutes
C: Built-in automatic/manual switching, with balanced pressure gauge, built-in stable air source, 2-position switching switch
Back section / PB-AA Measuring Element Configuration
PB: Spiral spring pressure measuring element (316 stainless steel material), directly measures process pressure / negative pressure
AA: Standard range configuration, standard housing, standard air source interface specification

Core Technical Specifications
1. Pneumatic Circuit Standard Signal
Output control signal: 3–15 psi (20–100 kPa) industrial standard pneumatic signal
Supply air source: 20–30 psi clean instrument air
Normal air consumption: 0.3 cfm (0.5 m³/h)