Speedaire 4ZM19 Air Regulator

Speedaire 4ZM19 Air Regulator is an aluminum, 3/8 in NPT inline pressure regulator designed to tame high-pressure compressor air for downstream tools and equipment. With an inlet pressure rating up to 300 psi, it provides an adjustable outlet from roughly 5 to 150 psi, enabling consistent performance for a wide range of pneumatic devices. The unit supports a free-air flow of up to 208 cfm, helping sustain downstream pressure when multiple devices draw air simultaneously. Constructed for durability in commercial and industrial environments, the 4ZM19 is suited for general shop air systems, painting and finishing setups, light manufacturing lines, and maintenance operations where stable, regulated air pressure is important. Its standard 3/8 in NPT ports simplifies integration with common piping and fittings in many shops and service bays, and its robust regulator mechanism helps maintain steady pressure despite fluctuations in compressor output. In practice, it protects tools from over-pressurization while delivering the predictable pressure needed for consistent tool performance and finishing quality across a range of pneumatic applications.