FIR-1

Filter and regulate pneumatic supply gas in one compact instrument package

The Welker FIR-1 Filter / Instrument Regulator combines particulate filtration and pressure regulation for natural gas or instrument air supply lines. Designed for use upstream of pneumatic instruments as part of instrument packages, the FIR-1 helps remove damaging particles while reducing supply pressure to protect downstream equipment. With diaphragm sensing, adjustable output pressure with locknut, and a space-saving design, the FIR-1 supports sensitive low-pressure control, vibration-resistant settings, and longer regulator service life in natural gas and industrial instrumentation systems.