Caleffi 521519A Thermostatic and Pressure Balanced Mixing ValveThe Caleffi 521519A Thermostatic and Pressure Balanced Mixing Valve delivers precise hot water blending for domestic hot water, radiant heating, and hydronic systems. This 3 4 inch valve features soldered connections and a durable brass body, designed for reliable, long term performance. Set temperature ranges from 85 to 150F, with a temperature rating up to 200F and a maximum differential pressure of 20 PSI to protect fixtures. The valve is lead free

Key specifications and capabilities include a 125/250/277 VAC contact voltage rating

ensuring steady airflow

Wide terminal compatibility: RC

and process systems

reliable performance for single-stage heat-only applications

the RIB2421C offers flexible integration with minimal wiring effort

This 120V to 24V transformer is designed for Class II circuits and UL Listed for US/Canada

3/4 inch outlet

and light-industrial HVAC environments

it fits into standard control panels while offering robust performance

Standard Factory Setting: 15 PSI

5" L × 3" W × 3