Aprilaire 4740 Relay 326010-701 this valve body is specifically

this valve body is specifically rated for low-pressure steam systems up to 15 psi WSP

Key Benefits: Direct Compatibility: Functionally replaces the Siemens MK-693-85

the UTT-01 motor tester minimizes system downtime by diagnosing faulty communicating modules and internal windings in residential and commercial units

Rated for a maximum operating pressure of 250 PSI and temperatures up to 400°F

Using the 971-0090-47 ensures the trip points match the specific amperage range of your equipment

Aprilaire 4740 Relay 326010-701 this valve body is specificallyThe Aprilaire 4740 Relay is a critical replacement component engineered specifically for Aprilaire 700 series humidifiers, including the 700A and 700M models manufactured after 2008. As a genuine AprilAire humidifier part, this fan relay is responsible for powering the circulator fan when the humidistat signals for moisture. Unlike older "Series One" versions that utilized the 4238 control board with an integrated transformer, this modern 24V