Jiangsu Haifa Machinery Manufacturing Co., Ltd.

I. Product Overview

The VSD/VDD Series Vertical Multistage Centrifugal Pumps (model coverage VS1 to VS7) are a new generation of high-efficiency, energy-saving fluid conveying equipment independently designed, developed, and manufactured by Jiangsu Haifa Machinery Manufacturing Co., Ltd. This series strictly follows ISO and relevant domestic mechanical industry standards, combined with the company's many years of manufacturing experience in the fluid machinery field, and is specifically designed for medium/high pressure and high flow rate conditions in modern industry, municipal engineering, civil construction, and other fields.

The VSD/VDD series, characterized by compact structure, smooth operation, low noise, and long life, is widely used in water treatment, industrial boosting, boiler feed water, fire protection systems, air conditioning circulation, and many other applications.

II. Model Description

• VSD: Standard vertical multistage centrifugal pump (standard mechanical seal / gland packing)

• VDD: Extended shaft / special configuration vertical multistage centrifugal pump (suitable for high temperature or special media)

• VS1~VS7: Indicates the number of stages or impellers; the higher the number, the higher the head.

Example: VSD-VS3-50
→ VSD series, 3 impeller stages (VS3), vertical multistage pump with 50mm inlet/outlet diameter.

III. Main Technical Parameters (Range Values)

Parameter	VSD/VDD Series (VS1～VS7)
Flow Range	[1.5~300] m³/h
Head Range	[10~300] m
Motor Power	[0.55~132] kW
Medium Temperature	-20℃ ~ +120℃ (VSD standard); ≤180℃ (VDD high-temp version)
Max. Working Pressure	≤2.5 MPa (25 bar)
Rotational Speed	1450/2900 r/min (depending on motor poles)
Pump Body Material	Cast iron / Stainless steel 304 / Stainless steel 316
Impeller Material	Stainless steel 304 / Stainless steel 316 / Bronze
Shaft Material	Stainless steel 420 / 304 / 316
Sealing Type	Mechanical seal (single/double face) / Gland packing

Note: For detailed performance curves and selection tables for each specific model (VS1~VS7), please refer to our company's "Selection Manual" or contact technical support.

IV. Structural Features

1. Modular Design
   High commonality of parts among VS1~VS7 models, facilitating maintenance and spare parts management.

2. Efficient Hydraulic Model
   Impellers and diffusers optimized using CFD to maintain high efficiency across the operating range, achieving significant energy savings.

3. Vertical Structure
   Motor and pump body mounted coaxially, small footprint, suitable for space-limited installations.

4. Rigid Shaft Design
   Ensures low radial run-off even at high speeds, extending mechanical seal and bearing life.

5. Multiple Inlet/Outlet Orientations
   Available configurations include bottom-in top-out, side-in top-out, etc., adapting to different piping layouts.

V. Typical Applications for Each Sub-model (VS1～VS7)

Model	Stages	Typical Applications
VSD/VDD-VS1	1 stage	Low-head high-flow circulation systems, cooling water transport, air conditioning systems
VSD/VDD-VS2	2 stages	Medium/low pressure water supply, industrial cleaning equipment, RO pretreatment
VSD/VDD-VS3	3 stages	Boiler feed pumps, high-rise building boosting water supply, fire protection stabilization systems
VSD/VDD-VS4	4 stages	Medium pressure industrial process pumps, oilfield water injection, chemical media transfer
VSD/VDD-VS5	5 stages	High-pressure cleaning systems, high-pressure boiler feed water, RO high-pressure pumps
VSD/VDD-VS6	6 stages	Long-distance pipeline boosting, mine drainage, high-pressure fire protection systems
VSD/VDD-VS7	7 stages	Special high-pressure processes, test benches, reverse osmosis seawater desalination

Note: Custom high-head pumps with more than 7 stages are available upon request.

VI. Applicable Media

• Clean water and liquids with physical/chemical properties similar to clean water

• Mildly corrosive industrial wastewater

• Suspensions containing small amounts of solid particles (requires special configuration)

• Oils, coolants, ethylene glycol solutions

• High-temperature hot water, thermal oils (use VDD series)

VII. Installation and Operating Conditions

1. Ambient Temperature: ≤40℃

2. Altitude: ≤1000m (derating required above this)

3. Suction Conditions: Pump must be installed with flooded suction or equipped with a foot valve / vacuum priming device. Dry running is strictly prohibited.

4. Power Supply: 380V/50Hz (other voltages/frequencies available on request)

5. Protection Rating: IP54/IP55

6. Insulation Class: Class F

VIII. Performance Advantages

• Low NPSHr: Optimized suction channel design reduces cavitation risk.

• Low Noise: Precision dynamically balanced impellers; operating noise below standard requirements.

• Long Life: Key components use wear-resistant / corrosion-resistant materials; bearing brands available include SKF, NSK, or high-quality domestic brands.

• Easy Maintenance: Mechanical seals and bearings can be replaced without removing piping.

IX. Scope of Supply

Standard supply includes:

• Hydraulic parts: pump body, impeller, shaft, diffuser, etc.

• Baseplate (cast iron or welded steel)

• Coupling and guard

• Y-series / High-efficiency IE3 motor

• One set of mechanical seal (spare seal optional)

• Matching inlet/outlet flanges, bolts, gaskets

• Product certificate, installation and operation manual

X. Selection and Customization Instructions

Please provide the following information when selecting a pump:

1. Flow rate (m³/h)

2. Head (m)

3. Medium name, temperature, pH value, viscosity

4. Site altitude and environmental conditions

5. Special requirements (explosion-proof motor, special materials, ATEX certification, marine use, etc.)

Jiangsu Haifa Machinery Manufacturing Co., Ltd. can perform non-standard design for VS1~VS7 according to customer operating conditions (e.g., changing impeller diameter, adding inducer, changing seal type, etc.).

XI. Quality and Certifications

• Manufacturing Standard: GB/T 5657 / ISO 9906

• Testing Standard: ISO 9906 Grade 2 accuracy

• Available: CE certification, Explosion-proof certificate, Material certificate, Performance curve report

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