The Rheem-Ruud 61-26018-99 is a high-precision 4-ton thermostatic expansion valve designed specifically for R-22 refrigerant systems

replacing the canister with the York S1-8044 with O-rings restores full steam generation capacity and prevents common "Service" or "Change Canister" indicator lights on the control board

Designed for streamlined field maintenance

requiring standard brazing techniques and nitrogen purging to prevent internal oxidation

While the 3/8" x 5" copper bulb can be used for air sensing

Greenheck 460511 Limit Switch 318518-761 The Rheem-Ruud 61-26018-99 is aThe Greenheck 460511 Limit Switch is a critical safety component designed for high performance air handling and ventilation systems. This OEM Greenheck replacement part acts as a thermal safeguard, monitoring air temperature and breaking the electrical circuit if limits are exceeded to prevent equipment failure. Engineered for precision, the 460511 high limit switch features a fixed temperature setpoint calibrated for industrial HVAC applications,