Back Pull-out Inline Pump

🌐 Application Fields

TB pumps are suitable for clean, non-corrosive, non-flammable and non-explosive media that contain no solid particles or fibers which may cause physical or chemical damage to the pump. It is mainly used for liquid transmission, pressure boosting and circulation, for example:

• Heating systems
• District water supply systems
• Secondary pressure boosting for high-rise building pipe networks
• Air conditioning circulating cooling systems
• General industrial equipment cleaning & circulation systems
• Boiler feed water
• Domestic potable water supply

📋 Operating Conditions

• Size Range: DN32-DN300
• Flow Range: 12.5m³/h ~ 900m³/h
• Head Range: 10m ~ 81m
• Power Range: 1.1kW ~ 200kW
• Power Supply: 3~380V, 50Hz
• Rated Speed: 1450, 1480, 2900r/min
• System Pressure: Max. working pressure 1.6MPa for DN100 and below; 1.2/1.6MPa for DN125 and above
• Medium: Temperature 0~120°C, PH value 5~9
• Ambient Temperature: -15℃ ~ 40℃

TB type back pull-out inline pump (hereinafter referred to as inline pump) comes standard with an IE3 premium efficiency motor. Optimized hydraulic and structural design, together with industrial design and reliability test, endows the pump with features of high efficiency & energy saving, stable performance, low noise, overload-free operation, large flow rate, wide high-efficiency range and attractive appearance. This product can fully replace similar imported products.

Product Features

1. Back Pull-out Structure The motor, coupling and impeller assembly can be pulled out as a whole from the rear of the pump casing, without disconnecting the inlet and outlet piping. This allows maintenance, seal replacement and impeller inspection to be done quickly without breaking the pipeline, minimizing downtime — ideal for continuous-operation systems that cannot afford long water shutdowns.
2. Standard IE3 Premium Efficiency Motor Equipped with an IE3 premium-efficiency three-phase asynchronous motor for lower energy consumption, higher operating efficiency and noticeable long-term electricity savings, meeting international efficiency standards.
3. Optimized Hydraulics & Structure Designed with CFD hydraulic modeling and validated through reliability testing, the pump delivers low hydraulic loss, a wide high-efficiency operating range and high efficiency even at large flow rates, with a stable performance curve.
4. Stable Operation & Low Noise High-precision rotor balancing keeps vibration to a minimum. Optimized flow-path design reduces fluid-impingement noise, making the pump quiet enough for installation in buildings, machine rooms and other close-to-occupancy locations.
5. Non-overloading Characteristic The maximum shaft power is limited below the rated motor power, so the motor will not overload even at maximum flow. This provides better tolerance to network fluctuations and operational errors.
6. Compact & Aesthetic Design The in-line direct-coupled design places inlet and outlet on the same centerline, so the pump can be installed like a valve directly in the piping. It occupies little floor space, simplifies installation and keeps the layout clean.
7. Direct Replacement for Imported Equivalents Reliability and performance parameters are benchmarked against similar imported in-line pumps, with lower procurement and maintenance costs.

Application Scenarios

Medium requirements: clean, non-corrosive, non-flammable and non-explosive liquids containing no solid particles or fibers that would cause physical or chemical damage to the pump.

1. Heating systems — hot-water circulation for buildings and industrial plants.
2. Air-conditioning circulating & cooling systems — chilled water and cooling water circulation for central air conditioning.
3. Boiler feed water — make-up water supply for small boilers.
4. District water supply systems — water transmission for centralized district supply.
5. Secondary pressure boosting in high-rise buildings — pressurized water supply for high-rise residential towers and office buildings.
6. General industrial equipment cleaning & circulation systems — clean-water circulation and equipment wash-water supply.
7. Domestic potable water supply — pressurized domestic water distribution.

Routine Maintenance

1. Mechanical seal inspection — Check periodically for weeping or leakage at the pump. If leakage increases continuously, shut down and replace the seal. The back pull-out design allows the rotor assembly to be withdrawn quickly without dismantling the piping.
2. Lubrication & bearing care — The motor uses built-in bearings; re-grease according to the motor manual. Listen for abnormal noise and monitor bearing temperature; if unusual sounds or overheating occur, stop and inspect bearing wear.
3. Regular monitoring — Track operating current, inlet/outlet pressure, medium temperature, vibration and noise, and compare against rated parameters to detect performance degradation early.
4. Impeller & casing cleaning — Over time, trace contaminants may settle. Use the back pull-out feature to withdraw the rotor and clean limescale and deposits from the casing and impeller to preserve hydraulic efficiency.
5. Long-term shutdown — Drain all water from the pump when out of service to prevent freezing and cracking. Turn the shaft periodically to prevent seizure. Protect the motor against moisture in damp environments.
6. Electrical checks — Inspect terminal connections and cable insulation regularly, and clean dust from motor cooling fins to ensure good heat dissipation.

Safety & Operating Precautions

1. Medium restriction — Only pump clean, water-like fluids. Do not pump strongly corrosive liquids, silt-/fiber-laden wastewater, or flammable/explosive media. Medium pH must be kept within 5–9, and medium temperature within 0–120°C.
2. Cavitation protection — Installation must satisfy the required NPSHr. Keep suction-pipe resistance low to avoid cavitation, which causes impeller erosion and increased vibration and noise.
3. System pressure limit — For DN100 and smaller, maximum working pressure is 1.6 MPa; for DN125 and larger, 1.2 / 1.6 MPa. Never exceed rated pressure.
4. Ambient conditions — Use at ambient temperatures between -15°C and 40°C. Ensure adequate motor ventilation; do not enclose the pump in a small, unventilated space.
5. Start-up procedure — Vent and fill the pump casing with liquid before starting. Dry running is strictly prohibited and will quickly destroy the mechanical seal. Turn the shaft by hand before start-up to confirm the rotor rotates freely.
6. Speed matching — Operate strictly at the nameplate rated speed. Do not use VFD to overspeed the pump.
7. Power supply — Designed for 3-phase 380V / 50Hz. Keep voltage fluctuation within motor-rated limits to avoid damage.
8. Piping support — Support inlet and outlet piping independently. Do not let the weight of the piping rest on the pump body, as this can deform the casing and damage seals and bearings.