F-4

The Welker F-4 Filter Dryer is designed to remove water, aerosols, odorant, mercaptan, sulfur, and liquid hydrocarbons from natural gas or instrument air supply lines. Installed upstream of pneumatic instruments, emergency shutdown valves, control valves, automated ball valve assemblies, compressors, refineries, offshore production sites, and processing plants, the F-4 helps reduce line freezing, improve instrument performance, and lower maintenance requirements. With a spin-on filter body, mounting bracket, and filter cartridge media, the F-4 provides clean, dry supply gas for demanding instrumentation and pneumatic control applications.