Honeywell 315559E Resistor

The Honeywell 315559E is a high-precision pneumatic tee restrictor designed for commercial HVAC control systems. This critical component serves as a fixed orifice within pneumatic tubing systems, specifically engineered to regulate airflow and maintain consistent branch line pressure for pneumatic thermostats and HVAC zoning accessories. As a veteran technician knows, maintaining the correct time constant in a control loop is essential; the Honeywell 315559E/U provides the precise restriction required to prevent oscillation and ensure stable valve or damper positioning. This model is functionally identical to the 315559E/U and is primarily utilized as a restriction kit with leads for integration with PP92B series controllers. Its robust construction ensures reliable performance in demanding mechanical room environments where precision air regulation is non-negotiable for system balance.

• System Calibration: Provides exact airflow restriction to ensure pneumatic control signals remain stable and responsive.
• Universal Compatibility: Fully interchangeable with 315559E/U, simplifying inventory for field service calls.
• Direct Integration: Equipped with leads for seamless installation into PP92B pneumatic controllers and similar HVAC supplies.
• Tubing Security: Designed for standard 1/4-inch pneumatic tubing configurations typically found in commercial automation.

• What is the difference between 315559E and 315559E/U? These part numbers refer to the same technical component. The "/U" suffix typically denotes "Universal" packaging, but the physical restrictor tee and its flow characteristics remain identical.
• Can this be used with non-pneumatic systems? No, this Honeywell resistor kit is strictly for pneumatic tubing systems and airflow regulation.
• Why is a restrictor tee necessary in a thermostat branch line? Without a pneumatic tee restrictor, the air signal may bleed off too quickly or surge, causing the actuator to hunt and leading to premature wear on mechanical linkages.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.