How does the Parker A81OE handle variable loads

How do I verify if this replaces my existing G775RGA-2

For high-temperature or high-pressure steam applications

Operating at a standard 1725 RPM

This genuine OEM replacement part is the direct replacement for HK02AC027

Lochinvar & A.O. Smith 100108951 Thermostat 321894-706 How does the Parker A81OEThe Lochinvar & A. O. Smith 100108951 Thermostat is a critical OEM replacement part designed for high performance commercial and residential electric water heaters. As a heavy duty upper thermostat, it provides precise temperature control to ensure the heating elements cycle correctly and maintain system efficiency. This thermal regulator comes integrated with an Emergency Cut Off (ECO) safety switch, which manually trips to prevent overheating