Sullair 409783 Blowdown Valve Assembly

The Sullair 409783 blowdown valve is a 2-way normally closed (NC) venting valve engineered for automatic unloading operations in rotary screw air compressors. It manages system pressure by releasing excess compressed air during unload cycles, ensuring safe operational levels and protecting downstream equipment. The valve features a 1-inch port size and stainless steel construction suitable for air, gas, and liquid media. It operates within a temperature range of -20°C to 120°C with a rated service life of 6000 hours. This component serves as a direct OEM replacement for Sullair part number 409783 and cross-references C6654, 250025-655, and 250019-451.