Fisher 67AF Pressure Regulator

Fisher 67AF pressure regulator (67AFR/224 variant) is a compact, 1/4 in. NPT inlet/outlet regulator that reduces higher supply pressure to a stable, low-pressure output for instrumentation and pneumatic control. In the 1/4 in. FNPT version, it handles inlet pressures up to 250 psi and provides an adjustable outlet in the 0–35 psi range, with a commonly used spring range of 5–35 psi. The 67AF/67AFR family is used in pneumatic control and gas service applications to deliver regulated instrument air or pilot pressure for valves and sensors. The 67AFR designation identifies the filter-regulator variant, which integrates filtration to help protect downstream devices from particulates while maintaining a steady pressure. Typical installations use 1/4 in. NPT connections, enabling compact, space-saving layouts in control panels, benchtop test rigs, or instrumentation cabinets where reliable pressure regulation is essential. This regulator is selected when a compact, dependable source of regulated pneumatic pressure is needed to power sensors, actuators, or other instrumentation components in environments requiring precise setpoint ranges and resilience to higher inlet pressures.