United Electric J21K-357 Pressure Switch R-22 OEM Reliability: Direct cross-reference 7870769

OEM Reliability: Direct cross-reference 7870769 for 7866187 maintains original factory specifications for safety and performance

Key Benefits Precise Signal Processing: Facilitates seamless parallel communication between the central processor and field devices for accurate system diagnostics

This insulated base door serves as a direct drop-in for worn or degraded factory panels

Enhanced Reliability: The guided lever action ensures the valve seats properly under all operating conditions to prevent liquid loss

matching the standard layout found on modern TrueZONE panels

United Electric J21K-357 Pressure Switch R-22 OEM Reliability: Direct cross-reference 7870769The United Electric J21K 357 is a dual bellows differential pressure switch engineered for precision monitoring in demanding HVAC and industrial environments. This model features an adjustable set point range of 0 to 70 PSID, providing reliable filter status monitoring and flow verification for chillers, compressors, and pump systems. The J21K 357 is housed in a rugged, epoxy coated aluminum NEMA 4 enclosure, ensuring protection against water and dust