5HP pump relay kit engineered for precise load management in commercial and residential hydronic systems

Optimized Heating Control: Precision modulation within a 160°F to 205°F range for high-temperature fluid loops

The K32-9 features a 5/8" swt (sweat) connection for the refrigerant line and a 1-1/4" Rotolock thread for attachment to the compressor or receiver

It is built to maintain stable airflow and precise electrode alignment for firing rates ranging from 0

Siemens Building Technology 331-916 Mounting Bracket 319825-402 5HP pump relay kit engineeredFor field technicians and mechanical contractors tasked with retrofitting or mounting pneumatic controls, the Siemens 331 916 (AP331) is the standard issue side mounting bracket designed specifically for No. 3 and No. 4 pneumatic damper actuators. Built for rigid, stable installations, this fixed mounting bracket ensures proper alignment of the actuator to the damper shaft, preventing side loading that can prematurely wear out actuator seals or cause