this twin-tube pneumatic line simplifies the routing of dual-signal control paths

specifically engineered for pump-up or high-level fill applications where the relay remains energized while the probe is dry

and 3155 Series units

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

Siemens Building Technology GMA131.1U Actuator R-407C this twin-tube pneumatic line simplifiesThe 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