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Home / Products / Category / Industrial Pump / Vertical multistage pump / Stainless Steel Multistage Pump TDLF | High Pressure Booster 300m Head

Stainless Steel Multistage Pump TDLF | High Pressure Booster 300m Head

Core Application Fields

Municipal & Civil: Secondary pressure boosting for high-rise buildings and large-scale centralized heating systems.

Industrial Transmission: High-pressure industrial cleaning systems, boiler feed water, and machine tool coolant circulation.

Water Treatment: High-pressure pumps for Ultrafiltration (UF) and Reverse Osmosis (RO) systems, and water softening units.

Agriculture & Irrigation: Greenhouse misting systems and long-distance irrigation for golf courses.

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Model:
TDLF

Product Overview

Product Structure

Hydraulic Performance

FAQ

Others

Product Overview

The TDLF series is a non-self-priming vertical multistage centrifugal pump, specifically engineered as the core power unit for high-rise building pressure boosting and industrial high-pressure fluid transmission.

Structural Design: It features a vertical long-shaft structure with the motor positioned at the top, driven directly via a coupling. The suction and discharge ports are aligned on the same horizontal plane (in-line design), allowing for an extremely compact installation footprint.

Space-Saving Design: The vertical installation structure saves approximately 60% of floor space compared to horizontal pumps with similar parameters, which is perfect for pump rooms with limited space.

Core Advantage: All components in contact with liquid (overflow parts) are made of high-grade stainless steel to ensure water purity. Its high-head capability allows for vertical delivery up to 300 meters, making it a reliable choice for modern industrial applications.

Maintenance Convenience: Equipped with a standard motor for easy replacement; the cartridge-type mechanical seal design allows for rapid seal replacement without removing the motor, ensuring long-term, maintenance-free operation.

Efficient & Silent Operation: Utilizing optimized hydraulic models, the pump operates with extremely low noise, making it ideal for environments with strict acoustic requirements such as office buildings, hotels, and hospitals.

Working Principle

The TDLF pump increases liquid pressure through the continuous work of multistage impellers:

Suction & Initial Boosting: Liquid enters the first-stage impeller from the bottom inlet and gains initial pressure through centrifugal force.

Interstage Stacking: The liquid is guided by stationary vanes into the next impeller stage; with each additional stage, the pressure of the liquid is cumulatively increased.

High-Pressure Discharge: After passing through multiple stages of acceleration, the liquid reaches the preset high-pressure state and is discharged through the outlet on the opposite side of the pump base.

Axial Force Balance: Precision-calculated impeller distribution and thrust bearing designs effectively balance the axial forces generated during operation.

Technical Parameters

Max Flow	240m³/h	Voltage	380V
Max Head	300m	Frequency	50Hz
Speed	2950RPM	Max Motor Power	110KW
Structure	VERTICAL	Mounting type	B5/B14
Outlet Diameter	DN25~DN150	Efficiency Level	IE3
Sealing type	MECHANICAL SEAL	Insulation Class	F
Working Pressure Max	PN16/PN25	Protection Class	IP55
Liquid Temperature	-15°C~120°C	Cooling Method	AIR-COOLED
Product Certificate	/	Thermal Protection	/

Product Structure

Premium Material Upgrade: All hydraulic components are constructed from stainless steel (304 or 316) through stamping and welding processes, resulting in ultra-smooth flow passages that significantly reduce energy loss.

High Head & Pressure Resistance: Multiple stages of impellers are connected in series to stack pressure; a single pump can achieve a maximum head of 300m, meeting the needs of super high-rise buildings and long-distance transport.

No.	Name	Material
1	Electric motor base	HT200
2	Shaft	0Cr18Ni9
3	House of Mechanical Seal	TDLF		ZG0Cr18Ni9
		TDL	64 and below	HT200
			90 and above	QT600-3
4	Mechanical Seal	Sub-assembly
5	Impeller	90 and below		0Cn8Ni9
		120 and above		ZG0Cr18Ni9
6	Diffuser	90 and below		0Cr18Ni9
		120 and above		ZGOCr18Ni9
7	Cylinder	0Cr18Ni9
8	OUTLET AND INLET	TDLF		0Cr18Ni9
		TDL	8 and below	HT200
			12 and above	QT600-3
9	Base Plate	TDLF		HT200
10	Inducer	0Cr18Ni9
11	Diffuser with bearing	0Cr18Ni9
12	Sliding bearing	YG6
13	Seal ring	F-4
14	Top diffuser	0Cr18Ni9
15	Coupling	ZG25
16	Motor	Sub-assembly

TDL vs. TDLF Selection Guide

Model	Material Grade	Recommended Environment
TDL	Cast Iron Base / SS304 Flow Parts	Non-corrosive domestic drinking water, standard cold/hot water circulation.
TDLF	Full Stainless Steel (304/316)	Lightly corrosive liquids, demineralized water, pharmaceutical/food media, or chemical raw materials.

Hydraulic Performance

Head Configuration Advice

30-50 Story Buildings: Recommended to select high-stage configurations (e.g., 15 stages or more).

Industrial Cleaning: Select models with low flow and high head based on specific pressure requirements of the cleaning equipment.

FAQs

Insufficient flow or unable to reach the rated head after startup?

Checkpoints: First, verify if the motor rotation is reversed. Next, check for air leaks in the suction pipeline or clogged filters. Ensure impellers are not damaged by foreign debris.
Excessive noise or significant vibration during operation?

Solutions: Check the alignment between the pump shaft and motor shaft. Ensure foundation bolts are tightened. If a "crackling" sound is heard, check for cavitation caused by insufficient suction pressure.
Water leakage at the mechanical seal?

Advice: Check if the seal was damaged by "dry running" (operating without water). TDLF supports quick seal replacement without motor disassembly; contact a technician to replace with an original seal immediately.
Why choose a vertical design over a horizontal one?

Answer: The vertical design not only saves space but also ensures a more uniform bearing load due to the vertical alignment of the motor and pump, providing better stability in high-head conditions compared to horizontal multistage pumps.
Can TDLF pumps be used with variable frequency drives (VFD) for energy saving?

Answer: Yes. TDLF pumps are highly compatible with VFDs. Adjusting the motor speed according to real-time pressure demands can significantly reduce energy consumption and extend the lifespan of the mechanical seal and motor.

Model selection instructions

After sales1

Users' selection shall not be limited by the performance parameters list. Parameters in the catalog are only for reference. We could design and manufacture the product according to the actual requirements. If there is a special selection beyond the sample performance parameters, please get in touch with our technical support.

If the selected model is close to performance parameters, generally standard impeller pumps and high-speed pumps are preferred. (NPSH shall meet the requirements).

If a high-voltage motor or special motor is required, please DO NOT make the foundation according to the installation dimension of the sample. Our technical support shall customize the drawings.

Product Overview

Product Structure

Hydraulic Performance

FAQ

Others