This is a robust, electronically controlled variable‑speed flanged circulator designed for commercial hydronic applications such as hot‑water heating, air‑conditioning and ventilation systems. Part of the Stuart Pulse Cast Iron Flanged range, this model continuously monitors and adjusts pressure and flow to provide intelligent, energy‑efficient circulation tailored to system demand. Its advanced control features, durable construction and built‑in protections make it suitable for professional plant‑room environments where reliable and adaptive fluid movement is essential.
Adaptive variable speed control with multiple operating modes, automatic, proportional pressure, constant pressure and constant speed, for responsive system performance.
Automatic night operation mode to reduce energy consumption during periods of low demand.
ECM permanent magnet motor technology for high energy efficiency and compliance with ErP.
Automatic venting cycle to help minimise entrained air and improve reliability.
Durable cast iron housing with carbon bearings designed for commercial plant‑room service.
Flanged DN40 connections and 220 mm fitted length for secure inline installation.
LED control panel for intuitive configuration and system status feedback.
Built‑in protections including over‑current, over‑temperature and over‑voltage safeguards.
ErP compliant to meet current energy‑efficiency regulations.
Two‑year manufacturer’s warranty for peace of mind.
The Pulse 40/120‑F220 is engineered to deliver dependable, energy‑efficient performance in larger commercial hydronic systems:
Maximum head (closed valve): up to 12.1 metres for strong pressure delivery in extensive circuits.
Maximum flow rate: approximately 10.8 m³/h depending on system conditions.
Maximum working pressure: up to 10 bar, suitable for commercial heating applications.
Water temperature range: ‑10 °C to +110 °C, enabling compatibility with typical hydronic systems.
Minimum inlet pressure: 0.05 bar at fluid temperatures <75 °C for consistent operation.
These performance characteristics support efficient fluid circulation across demanding commercial HVAC, heating and cooling networks where dynamic control and energy efficiency are priorities.
Power supply: 230 V AC, single phase, 50 Hz — standard for commercial environments.
Duty rating: Continuous (S1) for sustained operation under varying loads.
Pump body material: Cast iron with carbon bearings for reliable long‑term performance.
Fitting length: 220 mm, facilitating easy installation into flanged systems.
Connection size: DN40 flanged connections for secure pipeline integration.
Enclosure protection: IP44 — suitable for typical indoor mechanical plant‑room environments.
Energy Efficiency Index (EEI): Approximately 0.20, indicating efficient performance across operating modes.
Maximum ambient air temperature: 40 °C continuous operation.
Stuart Turner Pulse 40/120‑F220 Commercial Circulator Pump
Installation and operating manual
Flange gaskets and mounting fittings
The Stuart Turner Pulse 40/120‑F220 Commercial Circulator Pump delivers adaptable, energy‑efficient circulation performance tailored for commercial hydronic heating and HVAC applications. Its variable‑speed control, automatic operational features, robust cast iron construction and advanced protections make it a dependable solution for building services engineers and installers specifying reliable, high‑performance circulators in demanding mechanical plant‑room environments.
