Speedaire 4ZM14A Air Pressure Regulator One Quarter Inch Inlet

Speedaire 4ZM14A Air Pressure Regulator is a compact, zinc-bodied regulator designed to sit on a compressed-air line and deliver stable downstream pressure from a 1/4" NPT inlet. It tolerates up to 300 psi inlet pressure and regulates down to a 5–150 psi output range, with a maximum flow capacity of 80 CFM, making it suitable for a wide range of shop tools and pneumatic actuators. The unit features a nonrising adjustment knob, which helps maintain a constant setting as supply conditions change, and it uses 1/4" NPT connections on both inlet and outlet with female threading for easy, leak-resistant installations. Rated for operation up to 150°F, this regulator is designed for typical workshop environments and can be integrated into Speedaire FRL assemblies to form a complete air-prep stage. Its combination of a durable zinc body, straightforward porting, and reliable pressure control makes it well suited for feeding pneumatic tools, cylinders, grippers, and automated equipment where precise, adjustable pressure is essential. This model is particularly useful when you need to protect downstream components from overpressure while maintaining consistent performance across varying compressor conditions.