The SPDT contact system is rated for 16 AFL / 96 ALR at 120V AC

Durable Construction: High-grade insulation protects against common failure points like moisture buildup and coil burnout

providing clear visual feedback on stem travel and system status

Includes the specific conversion spring needed for calibrated gas valve adjustments

this assembly provides the precision required for tight turndown ratios and high-velocity air streams

Siemens Building Technology SSD61.5U Actuator 319852-301 The SPDT contact system isThe Siemens SSD61. 5U is a high performance 0 10Vdc electronic valve actuator engineered for precise proportional control in HVAC applications. Designed for seamless integration with 1 2 inch to 1 1 4 inch Pressure Independent Control Valves (PICV), this unit delivers a nominal force of >56 lbs (250N) to ensure reliable operation in chilled and hot water systems. A critical feature of the SSD61. 5U is its spring return fail safe mechanism, which