SIEMENS Actuator STP73

Core Features "STP73" Series & Functional Design: The "STP73" denotes Siemens’ precision-focused electric linear actuator series, specialized for medium-duty hydronic valve control. It is a 24V AC-powered linear actuator with a 20 mm stroke length and 1500 N thrust rating (≈153 kgf)—ideal for 2-way/3-way hydronic valves (e.g., commercial HVAC chilled water valves, industrial process fluid valves) where high thrust and precise flow regulation are required. High-Precision Modulating Control: Equipped with a digital position sensor for analog position feedback (0–10V DC) and proportional modulating capability, enabling valve opening adjustment with ±1% positioning accuracy—critical for stable temperature or pressure control in commercial buildings (e.g., hotels, office towers) or industrial fluid processes (e.g., chemical mixing). It also supports on/off control for simple full-open/full-close scenarios (e.g., system isolation valves). Robust & Compact Construction: Engineered with a corrosion-resistant aluminum alloy housing and a weight of 1.6 kg (3.53 lbs), suitable for direct valve mounting (via ISO 5211 standard flange) or bracket mounting in commercial HVAC mechanical rooms or industrial process skids. The housing features IP54 protection (dust-tight, water-resistant), withstanding moisture, dust, and mild vibration—ideal for indoor commercial and light industrial environments. Safety & Reliability Features: Built with industrial-grade safeguards to ensure long-term uptime: Overthrust protection: Automatically stops the motor if thrust exceeds 1500 N (e.g., valve stem jamming from sediment), avoiding damage to the valve or actuator. Thermal overload protection: Shuts down the motor in case of overheating (e.g., prolonged heavy load), extending component lifespan. Wide voltage tolerance: Accepts 24V AC (50/60 Hz) input with ±15% fluctuation tolerance, ensuring stability in standard HVAC control system power supplies. Seamless Integration & Installation: Designed for plug-and-play compatibility with Siemens commercial BMS controllers (e.g., Desigo CC) and third-party PLCs via standard 0–10V analog signals. It includes a universal ISO 5211 flange (for direct valve mounting) and pre-labeled wiring terminals, reducing installation time by up to 25% vs. non-standard actuators. No specialized tools are required for setup. Typical Applications SIEMENS Actuator STP73 is engineered for medium-duty linear control of hydronic valves—ideal for scenarios needing 1500 N thrust, 20 mm stroke, and precision positioning in commercial HVAC or industrial fluid systems. Key use cases include: Commercial HVAC Chilled/Hot Water Valves: Controlling 2-way/3-way valves in commercial building hydronic systems (e.g., office towers, shopping malls). Modulating control adjusts water flow to match heating/cooling demand, improving energy efficiency—complying with EN 15513 (HVAC hydronic components) and ASHRAE 90.1 (energy efficiency standards). Industrial Process Fluid Valves: Regulating valves for water, glycol, or light oil in industrial processes (e.g., food processing, pharmaceutical manufacturing). ±1% positioning accuracy maintains consistent process flow, while IP54 protection withstands process-area dust—complying with IEC 60534 (industrial valve standards) and GMP (good manufacturing practices). Large Fan Coil Units (FCUs): Controlling hydronic valves in large commercial FCUs (e.g., hotel lobbies, airport terminals). High thrust handles larger valve stems, and compact design fits FCU enclosures—complying with EN 14511 (air handling units and FCUs). District Heating/Cooling Systems: Adjusting valves in district heating/cooling distribution networks. Position feedback enables centralized monitoring via BMS, ensuring balanced flow across multiple buildings—complying with EN 12831 (district heating design standards).