Rely on these Spence valve repair parts for a factory-spec fit that maintains the packless

Integrated as a primary safety limit

Built with a durable probe housing and a standard two-wire thermal connection

or inconsistent water temperatures that do not match the digital display setpoint

the 511-330-097 ignition board prevents gas buildup during failed ignition attempts

Siemens Building Technology GMA131.1U Actuator R-407C Rely on these Spence valveThe Siemens Building Technology GMA131. 1U is a specialized OpenAir electronic damper actuator engineered for commercial HVAC applications. This 24V spring return actuator provides 62 lb in torque (7 Nm), making it an ideal choice for managing return air, mixed air, and exhaust dampers in both constant and variable air volume (VAV) systems. Designed with three position control (floating), it allows for precise positioning while ensuring a reliable