The Foxboro 104043018 corresponds to the FRS02 pneumatic filter-regulator, designed for use in industrial control systems to ensure clean and regulated air supply.

• Type: Pneumatic Filter-Regulator
• Model: FRS02
• Part Number: 104043018
• Port Size: 1/4 inch NPT
• Pressure Range: 0–116 PSI (also available in 0–150 PSI variants)
• Max Pressure: 150 PSI
• Application: Designed for direct mounting with Foxboro positioners such as SRI990, SRD991, and SRD960
• Function: Filters and regulates compressed air to ensure consistent pressure and remove contaminants before entering sensitive pneumatic instruments