TD Series Pipeline Circulation Pump — Top-Pull-Out Design for In-Line Service
The TD Series pipeline circulation pump delivers reliable fluid transfer for district heating, HVAC, and industrial circulation systems. Its top-pull-out design allows maintenance without disrupting the piping network, reducing downtime and service costs for facility operators and mechanical engineers.
Core Performance Parameters
| Max. Working Pressure | 12 bar (standard) / 16 bar (special) |
| Liquid Temperature Range | -15°C to 110°C |
| Ambient Temperature | Up to +40°C |
| Altitude | Up to 1000 m |
| Rotation Direction | Clockwise (viewed from motor fan end) |
| Suction/Discharge Diameter | DN32 – DN300 |
Design Features
The TD Series pipeline circulation pump is a single-stage unit equipped with a standard motor and mechanical seal. Its design minimizes susceptibility to contamination from the pumped liquid compared to similar products. Key features include:
- Top-pull-out construction — The pump can be serviced and removed without disconnecting the piping system, significantly reducing maintenance time.
- Extended shaft structure (TD 32–TD 150) — Direct-coupled design with elongated shaft for compact installation in smaller pipe diameters.
- Easy-disassembly structure (TD 200–TD 300) — Cartridge-type mechanical seal allows seal replacement without removing the motor, simplifying large-diameter service.
- Clean-liquid compatibility — Suitable for thin, clean, non-corrosive, non-flammable liquids free of solid particles or fibers.
Motor Specifications
| Type | Fully enclosed, fan-cooled, 2-pole or 4-pole |
| Protection Class | IP55 |
| Insulation Class | F |
| Standard Voltage (50 Hz) | 1× 220–230/240 V; 3× 200–220/346–380 V |
Installation Guidelines
- System piping support — Pumps with motors ≤2.2 kW can be directly suspended in the pipeline. The piping system must provide adequate structural support.
- Mounting orientation — ≤2.2 kW pumps may be installed horizontally or vertically. Pumps with motors >2.2 kW must be installed vertically (perpendicular to the horizontal plane).
- Pipe stress isolation — Ensure system piping tension is not transmitted to the pump body during installation.
- Cooling clearance — Install in an environment with sufficient cooling air circulation (max 40°C). Minimum clearance: 300 mm for motors <5.5 kW; 1000 mm for motors ≥5.5 kW above and below the pump.
- Outdoor installation — Provide a suitable enclosure to protect electrical components from water ingress and condensation.
- Vibration dampening — Use a dampening base (typically concrete, weight ≥1.5× pump weight) to minimize noise and vibration for optimal performance.
Application Scenarios
District Heating Systems
The TD Series circulation pump serves district heating networks where water quality meets recognized system standards. Its mechanical seal design and clean-liquid construction ensure long service life in continuous heating cycles.
HVAC and Air Conditioning Systems
In HVAC applications, the pump provides reliable fluid circulation for heating, ventilation, and cooling loops. The top-pull-out design allows technicians to perform seal inspections and impeller checks during scheduled maintenance windows without draining the entire system.
Industrial Liquid Transfer
The TD Series handles a range of industrial liquids — from process water to compatible chemical media — in manufacturing facilities where uninterrupted circulation is critical to production continuity.
Why Choose Chaodun Pumps
Chaodun Pumps manufactures the TD Series pipeline circulation pump to rigorous quality standards, with each unit factory-tested before shipment. The top-pull-out maintenance design and cartridge seal option (for TD 200–TD 300) reduce total cost of ownership through faster service intervals and lower labor requirements. Our engineering team provides selection assistance, hydraulic calculations, and ongoing technical support throughout the equipment lifecycle.
For detailed specifications, dimensional drawings, performance curves, and application-specific selection guidance, contact our engineering team.