Core Features "SAL31" Series & Functional Design: The "SAL31" denotes Siemens’ ultra-light-duty linear actuator series, specialized for micro-scale hydronic valve control in compact residential and small appliance systems. It is a 24V AC-powered linear actuator with a 8 mm stroke length and 250 N thrust rating (≈25.5 kgf)—ideal for tiny 2-way hydronic valves (e.g., residential radiator micro-valves, small appliance fluid valves) where 24V low-voltage power, ultra-compact size, and basic reliability are critical. Basic Control Modes & Optional Feedback: Equipped with simple control to meet micro-flow needs: On/off control (24V AC input): For basic full-open/full-close scenarios (e.g., residential heating zone on/off, appliance fluid on/off), ensuring steady operation with fast actuation (≈2.3 seconds/full stroke). Modulating control (0–10V DC input, optional): For precision micro-flow adjustment (e.g., small office mini-split temperature trimming), enabling valve opening adjustment with ±3.8% positioning accuracy—sufficient for non-critical micro-environment control. It includes optional analog position feedback (0–10V DC) for valve status monitoring, compatible with residential smart thermostats or small appliance control boards. Ultra-Compact & Lightweight Build: Engineered with a flame-retardant high-impact plastic housing (UL94 V-0) and an ultra-lightweight design of 0.32 kg (0.71 lbs), suitable for direct micro-valve mounting (via micro ISO 5211 flange) or installation in extremely tight spaces (e.g., underfloor heating manifolds, appliance interiors). The housing features IP44 protection (dust-resistant, splash-proof), making it compatible with indoor residential and small appliance environments (e.g., apartments, countertop water heaters). Safety & Reliability Features: Built with safeguards for micro-scale operation: Overthrust protection: Automatically stops the motor if thrust exceeds 250 N (e.g., valve stem jamming from mineral buildup), avoiding damage to the tiny valve or actuator. Mechanical end stops: Prevent over-extension beyond full open/close positions, protecting delicate micro-valve seals and extending service life. 24V low-voltage safety: Designed for 24V AC (50/60 Hz) input with ±10% voltage tolerance, eliminating electrical hazards in occupied spaces. Simplified Installation: Designed for plug-and-play setup with no complex programming—works with Siemens residential controllers (e.g., RLU series) and third-party devices via standard 24V on/off or 0–10V signals. Its micro ISO 5211 flange fits most tiny hydronic valves, and color-coded wiring terminals reduce installation time to under 8 minutes for most applications. Typical Applications SIEMENS Actuator SAL31 is engineered for ultra-light-duty linear control of tiny hydronic valves—ideal for scenarios needing 250 N thrust, 8 mm stroke, and 24V power in residential or small appliance systems. Key use cases include: Residential Radiator Micro-Valves: Controlling tiny 2-way valves in residential radiator heating zones (e.g., bathrooms, small bedrooms). On/off control manages zone heating, while ultra-compact size fits radiator enclosures—complying with EN 12831 (residential heating design) and ASHRAE 90.2 (residential energy efficiency). Small Appliance Hydronics: Regulating micro valves in small appliances (e.g., countertop water heaters, compact beverage dispensers). Optional modulating control adjusts fluid flow to maintain appliance temperature, and IP44 protection withstands appliance moisture—complying with EN 15502 (appliance standards). Residential Underfloor Heating Manifolds: Adjusting tiny valves in residential underfloor heating manifolds (e.g., single-room zones). 24V low-voltage connection simplifies wiring to HVAC systems, and lightweight design avoids manifold strain—complying with EN 1264-4 (underfloor heating systems). Portable HVAC Hydronic Add-Ons: Controlling valves in portable HVAC hydronic accessories (e.g., small space heaters with hydronic coils). Simple on/off control meets basic heating needs, and compact size fits portable device enclosures—complying with EN 14511 (small HVAC components).