TD Series Pipeline Circulation Pump – Reliable In-Line Fluid Transfer for HVAC, Heating & Industrial Systems
The TD Series Pipeline Circulation Pump is a single-stage in-line pump designed for continuous fluid transfer, boosting, and circulation across district heating, HVAC, cooling, and industrial liquid handling systems. Built with a standard enclosed fan-cooled motor and mechanical seal, its structure resists contamination from pumped media better than comparable units, keeping downtime low in demanding environments.
A top pull-out design allows maintenance and seal replacement without disconnecting the pipeline, minimizing system interruption. Models from TD 32 to TD 150 use an extended shaft configuration, while TD 200 through TD 300 feature a quick-disassembly design with a cartridge mechanical seal — swapping the seal does not require motor removal.
Key Performance Parameters
- Maximum Working Pressure: 12 bar (standard type) / 16 bar (special type)
- Liquid Temperature Range: -15°C to 110°C
- Ambient Temperature: up to +40°C
- Maximum Altitude: 1,000 m
- Rotation Direction: Clockwise (viewed from motor fan end)
- Motor Protection Class: IP55
- Motor Insulation Class: F
- Motor Type: Fully enclosed, fan-cooled, standard 2-pole or 4-pole
- Standard Voltage (50 Hz): 1×220–230/240 V or 3×200–220/346–380 V
Model Designation
The TD naming convention encodes key specifications: TD indicates a pipeline circulation pump; the first number group (e.g., 50) denotes nominal suction/discharge diameter (DN); the second number (e.g., 24) represents rated head in meters; a digit indicates motor pole count; and a letter suffix such as “B” signals an explosion-proof motor option.
Application Scope
TD pumps handle clean, thin, non-aggressive, non-flammable liquids without solid particles or fibers — essentially water or media with similar physical-chemical properties. Common installations include:
- District heating systems (water quality must meet recognized system standards)
- HVAC and air-conditioning circuits
- Industrial cooling systems
- Domestic hot water recirculation
- Industrial liquid transfer and boosting
- General water supply networks
When pumping viscous or higher-density fluids, expect a reduction in the pump characteristic curve and increased energy consumption — system design should account for this.
Installation Guidelines
Pumps paired with motors ≤2.2 kW can be suspended directly in the pipeline and installed horizontally or vertically. Units with motors above 2.2 kW must be mounted vertically relative to the horizontal plane. Pipeline tension must not transfer to the pump body during operation.
Outdoor installations require a protective enclosure to prevent water ingress or condensation on electrical components. Minimum clearance for inspection and maintenance is 300 mm for motors under 5.5 kW and 1,000 mm for 5.5 kW and above. Anti-vibration mounting — typically a concrete base weighing at least 1.5 times the pump weight — is recommended to reduce noise and vibration. TD series models from 32 to 150 are available with or without a baseplate to suit project requirements.