Schneider Electric (Erie) VS2221 Valve Body 320819-301 the 396021 is specifically designed

the 396021 is specifically designed for two-stage gas valves

This hydraulic thermostat utilizes a precision-machined snap-action mechanism to provide immediate gas flow interruption or engagement

it is the correct choice for systems using distributors or those with significant pressure drops across the evaporator

Ensures a clean finish by covering structural damage and paint lines during thermostat replacement

Schneider Electric (Erie) VS2221 Valve Body 320819-301 the 396021 is specifically designedThe Schneider Electric (Erie) VS2221 Valve Body is a robust 1 2 inch NPT two way assembly engineered for low pressure steam and hydronic zone control. Designed for high cycle performance in commercial HVAC systems, this brass zone valve body features a 1. 0 Cv flow coefficient, ensuring precise regulation of terminal units. It utilizes a two position, spring return operation when paired with compatible Erie PopTop actuators, simplifying field