Direct OEM Compatibility: Specifically designed for Marley and QMark heating equipment

as a genuine Lennox part

Swapping a green spring into a unit designed for a different color without verifying the gas regulator capacity and pressure ratings can lead to over-pressurization or lock-up issues

As the system cools to 130°F

particularly when paired with 3098 series mercury-style or mechanical pilot safeties

Honeywell 311852 Spring Direct OEM Compatibility: Specifically designedThe Honeywell 311852 spring is a critical component for maintaining precise pressure control in commercial HVACR pneumatic systems. Engineering grade and brown in color, this replacement spring is specifically designed for use with 8 inch MP953A and MP953C Series pneumatic actuators. It calibrated for a 2 7 PSI spring range, ensuring accurate proportional control of steam, hot water, or chilled water valves. This veteran technician approved part is