SMAR FY301 Electro-Pneumatic Valve Positioner

Feature & Principle

It is SMAR FY301 digital intelligent electro-pneumatic valve positioner belonging to SMAR 301 instrument series. It receives 4-20mA setpoint signal from DCS system and converts the signal into pneumatic output pressure to drive pneumatic actuator. It adopts piezo flapper pilot valve and non-contact Hall effect position sensor, featuring low air consumption and high positioning repeatability. It supports HART digital communication for remote parameter setting, auto-calibration and valve diagnostic, including partial stroke test and friction monitoring. It complies with NAMUR mounting standard and can be fitted on both linear and rotary actuators. Explosion-proof and intrinsically safe versions are available for hazardous process areas.

Specifications

Model: FY301 Brand: SMAR Signal input: 4-20mA Communication: HART Actuator type: Single acting / Double acting Air supply pressure: 1.4 ~ 7 bar Position feedback: Non-contact Hall sensor Mounting standard: NAMUR Protection rating: IP67 Certification: ATEX, IECEx, SIL optional Application: Petrochemical, refining, chemical plant, pipeline control valve

Components & Diagnostics

Main control circuit board, pneumatic pilot assembly, Hall position feedback sensor, pneumatic manifold, local operation button and indicator, explosion-proof housing. Common faults: calibration failure, unstable stroke, HART communication offline, pneumatic port blockage, feedback signal drift.

Product Brief

FY301 intelligent valve positioner, SMAR 301 series electro-pneumatic control spare widely used for process control valve overhaul and replacement.