Smith 100274785 Pressure Relief Valve is a critical OEM replacement part engineered for high-capacity commercial boilers and water heating systems

and necessary hardware to minimize time on the job site

Key Benefits: Precision Thermal Control: Engineered with a slow make and break design to provide a close temperature differential for sensitive applications

ensuring stable performance in mechanical rooms and rooftop units

Industrial Grade Protection: Features automatic thermal overload protection to prevent winding failure during high-ambient operations

Siemens Building Technology 331-2906 Actuator 321894-708 Smith 100274785 Pressure Relief ValveThe Siemens Building Technology 331 2906 Actuator is a heavy duty, No. 4 pneumatic damper actuator engineered for precise control in commercial HVAC systems. This piston type actuator features a 5 to 10 psi nominal spring range and a robust 4 inch stroke, making it a reliable solution for modulating or two position control of outdoor air, return air, and exhaust dampers. Designed with a pivot mount configuration, it reduces binding and mechanical