Product Overview

The Horizontal Single-Stage Centrifugal Pump (also known as End-Suction Centrifugal Pump, Horizontal Water Pump, or Single Stage Water Pump) is a versatile and reliable fluid transfer solution designed for a wide range of industrial, commercial, and municipal applications. Manufactured by Shanghai Chaodun Machinery Manufacturing Group Co., Ltd., this pump series includes ISW (clean water), IRW (hot water), ISWH (stainless steel chemical), and ISWD (low noise) models to meet diverse operational requirements.

Featuring a horizontal configuration with back pull-out design, this pump allows for easy maintenance without disturbing the piping system. The single-stage impeller design provides efficient fluid transfer with minimal energy consumption, making it an economical choice for continuous operation applications. The pump’s robust construction and precision engineering ensure long service life and reliable performance across various operating conditions.

The pump is available in multiple material options including cast iron for general water applications, stainless steel for corrosive fluids, and bronze for marine environments. This flexibility allows customers to select the optimal configuration for their specific application requirements, ensuring maximum compatibility and performance.

Whether you need a pump for building water supply, HVAC systems, industrial process water transfer, agricultural irrigation, or municipal water distribution, the Horizontal Single-Stage Centrifugal Pump delivers consistent, efficient performance with minimal maintenance requirements.

Key Features

1. High-Efficiency Hydraulic Design – Optimized impeller and volute geometry maximize flow efficiency while minimizing energy consumption, reducing operating costs by up to 25% compared to conventional centrifugal pumps.
2. Back Pull-Out Design – Allows complete removal of rotating assembly without disturbing suction and discharge piping, reducing maintenance time by up to 70% and minimizing system downtime.
3. Mechanical Seal Configuration – High-quality mechanical seal with multiple material options (carbon, ceramic, silicon carbide) ensures leak-free operation and extended service life across various fluid types.
4. Precision-Balanced Impeller – Dynamically balanced impeller minimizes vibration and noise, ensuring smooth operation and extending bearing life for reduced maintenance costs.
5. Versatile Material Options – Available in cast iron, stainless steel 304/316, and bronze construction to handle clean water, hot water, corrosive chemicals, and seawater applications.
6. Standardized Dimensions – Complies with ISO 2858 and DIN 24255 dimensional standards, ensuring interchangeability with existing pump installations and simplifying replacement procedures.

Applications

1. Building Water Supply Systems – Primary and booster pumps for residential, commercial, and industrial building water distribution systems, providing reliable pressure maintenance for domestic water, fire protection, and HVAC applications.
2. HVAC Heating and Cooling Systems – Circulation pumps for chilled water and hot water loops in air conditioning systems, district heating networks, and industrial process cooling applications.
3. Industrial Process Water Transfer – Fluid transfer pumps for manufacturing processes, chemical processing, food and beverage production, and pharmaceutical applications requiring reliable, contamination-free fluid handling.
4. Agricultural Irrigation Systems – Water transfer pumps for crop irrigation, greenhouse watering, and agricultural water distribution systems, providing efficient water delivery across various terrain conditions.
5. Municipal Water Distribution – Water supply and distribution pumps for municipal water treatment plants, water tower systems, and community water distribution networks.
6. Fire Protection Systems – Booster pumps for fire sprinkler systems, fire hydrant networks, and fire suppression systems in commercial buildings, industrial facilities, and municipal infrastructure.

Customer Benefits

1. Reduced Operating Costs – High-efficiency hydraulic design and precision manufacturing minimize energy consumption, delivering significant cost savings over the pump’s operational lifetime through reduced electricity bills.
2. Minimal Maintenance Requirements – Back pull-out design and high-quality mechanical seals extend service intervals to 2-3 years, reducing maintenance costs and unplanned downtime while maximizing system availability.
3. Flexible Installation Options – Horizontal configuration with standardized dimensions allows installation in existing pump rooms without major modifications, reducing installation time and costs.
4. Long Service Life – Precision-balanced rotating assembly and corrosion-resistant materials ensure 15-20 year service life with proper maintenance, providing excellent return on investment.
5. Reliable Performance – Robust construction and proven hydraulic design ensure consistent performance across various operating conditions, reducing the risk of system failures and production interruptions.
6. Wide Application Range – Multiple model options (ISW, IRW, ISWH, ISWD) and material configurations allow selection of the optimal pump for specific application requirements, ensuring maximum compatibility and performance.

Technical Specifications

Parameter	Specification
Flow Rate Range	2-1200 m³/h
Head Range	5-150 m
Motor Power Range	0.37-250 kW
Speed Options	1450 / 2900 RPM
Inlet/Outlet Size	DN25-DN500
Maximum Operating Pressure	1.6 MPa (standard), 2.5 MPa (optional)
Maximum Operating Temperature	80°C (ISW), 120°C (IRW), 100°C (ISWH)
Pump Material	Cast iron (ISW), Stainless steel 304/316 (ISWH), Bronze (optional)
Shaft Material	Carbon steel, Stainless steel 304/316
Seal Type	Mechanical seal (carbon/ceramic/SiC)
Motor Protection	IP55, Class F insulation
Voltage Options	380V/50Hz, 440V/60Hz, 220V/60Hz
Connection Type	Flanged (PN16/PN25), Threaded (optional)
Noise Level	<70 dB(A) at rated speed

Selection Guidance

Selecting the right Horizontal Single-Stage Centrifugal Pump requires careful consideration of your system requirements:

1. Determine Required Flow Rate and Head – Calculate system flow based on application requirements and determine total dynamic head including static head, friction losses, and pressure requirements. Use pump performance curves to select the optimal operating point near best efficiency point (BEP).
2. Select Appropriate Model – Choose ISW for clean water applications, IRW for hot water systems (up to 120°C), ISWH for corrosive fluids and chemical processing, or ISWD for noise-sensitive environments such as hospitals and hotels.
3. Consider Fluid Properties – Evaluate fluid temperature, viscosity, corrosiveness, and solids content to select appropriate pump material and seal configuration. Standard cast iron is suitable for clean water; specify stainless steel for corrosive fluids or bronze for marine applications.
4. Choose Connection Type – Flanged connections (PN16 or PN25) are standard for most applications. Threaded connections are available for smaller sizes (DN25-DN50). Consider system pressure rating and piping configuration when selecting connection type.
5. Evaluate Motor Requirements – Select motor power based on pump duty point and fluid specific gravity. For variable flow applications, consider pairing with VFD (Variable Frequency Drive) for energy savings and precise flow control.
6. Consider Installation Environment – Evaluate space constraints, ambient temperature, humidity, and potential explosive atmospheres. For hazardous areas, specify explosion-proof motors and ATEX-certified configurations.

Installation and Maintenance

Installation Requirements:

• Install pump on level, rigid foundation with adequate vibration isolation
• Ensure proper alignment between pump and motor (laser alignment recommended)
• Install isolation valves, strainer, and pressure gauges on suction and discharge sides
• Provide adequate clearance for maintenance access (minimum 800mm around pump)
• Install check valve on discharge to prevent backflow when pump is stopped
• Ensure proper pipe support to prevent stress on pump flanges

Maintenance Schedule:

• Monthly: Visual inspection for leaks, unusual noise, or vibration; check bearing temperature
• Quarterly: Inspect mechanical seal condition, check motor current, verify alignment
• Annually: Inspect impeller and wear rings, check bearing condition, test mechanical seal
• Every 2-3 Years: Replace mechanical seal, inspect bearings, check impeller clearance
• Every 5 Years: Complete pump overhaul, replace bearings, inspect shaft condition

Maintenance Tips:

• Always shut off power and close isolation valves before maintenance
• Use manufacturer-recommended spare parts to maintain warranty and performance
• Keep maintenance log to track service intervals and component replacement
• Monitor pump performance (flow, head, power, vibration) to detect efficiency degradation
• Ensure proper lubrication of bearings according to manufacturer specifications

Available Configurations

The Horizontal Single-Stage Centrifugal Pump is available in multiple configurations to match your specific application requirements:

Configuration Option	Available Choices
Model Type	ISW (clean water), IRW (hot water), ISWH (stainless steel), ISWD (low noise)
Flow Range	2-1200 m³/h (multiple models)
Head Range	5-150 m
Motor Power	0.37-250 kW
Speed	1450 RPM (low speed), 2900 RPM (high speed)
Pump Material	Cast iron, Stainless steel 304, Stainless steel 316, Bronze
Seal Type	Single mechanical seal, Double mechanical seal, Gland packing
Connection Type	Flanged PN16, Flanged PN25, Threaded BSP/NPT
Voltage	380V/50Hz, 440V/60Hz, 220V/60Hz, Custom voltage
Motor Type	Standard efficiency, IE2 high efficiency, IE3 premium efficiency
Explosion Protection	Standard, Explosion-proof (Ex d IIB T4), ATEX certified

Custom Configurations:

• Special materials for highly corrosive or abrasive fluids
• Duplex mechanical seals for critical applications
• Integrated VFD for variable flow applications
• Custom voltage and frequency for international installations
• Special coatings for enhanced corrosion protection

FAQs

Q1: What is the difference between ISW, IRW, ISWH, and ISWD models?

ISW is the standard model for clean water applications up to 80°C. IRW is designed for hot water applications up to 120°C with special seal and bearing arrangements. ISWH features stainless steel construction for corrosive fluids and chemical processing. ISWD is optimized for low noise operation in noise-sensitive environments such as hospitals, hotels, and residential buildings.

Q2: Can these pumps handle fluids with solids or particles?

Standard Horizontal Single-Stage Centrifugal Pumps are designed for clean fluids only. For applications involving solids or particles, consider our sewage pump series (WQ, WQK) or grinder pumps specifically designed for wastewater and solids handling. The maximum particle size for standard pumps is typically less than 1mm.

Q3: What is the expected service life of these pumps?

With proper installation and regular maintenance, Horizontal Single-Stage Centrifugal Pumps typically provide 15-20 years of reliable service. Key factors affecting service life include fluid quality, operating conditions, maintenance frequency, and proper pump selection. Regular mechanical seal replacement (every 2-3 years) and bearing inspection (every 5 years) significantly extend pump life.

Q4: Can these pumps be used with variable frequency drives (VFD)?

Yes, all models are VFD-compatible when paired with inverter-duty motors (IE3 premium efficiency recommended). VFD operation provides significant energy savings in variable flow applications, typically 20-50% energy reduction compared to constant speed operation. Ensure minimum motor speed is above 25% of rated speed to maintain proper motor cooling.

Q5: What maintenance is required for the mechanical seal?

The mechanical seal is designed for 2-3 years of service under normal operating conditions. Signs of seal wear include visible leakage at the seal location or increased power consumption. Seal replacement requires removing the back pull-out assembly, replacing the seal cartridge, and reassembling. Typical seal replacement takes 2-4 hours depending on pump size.

Q6: How do I select between 1450 RPM and 2900 RPM models?

Lower speed (1450 RPM) models offer quieter operation, longer bearing life, and better efficiency at higher flow rates. Higher speed (2900 RPM) models are more compact and cost-effective for lower flow, higher head applications. For noise-sensitive environments, 1450 RPM is recommended. For industrial applications where noise is less critical, 2900 RPM provides better value.

Contact Chaodun

For technical consultation, quotation requests, or project support regarding Horizontal Single-Stage Centrifugal Pumps, please contact our engineering team:

Website: https://chaodunpump.com
Email: Suzion@chaodunpump.com
WhatsApp: +44 751 8050 473
Phone: +86 21 5744 5678

Our pump application engineers are available to assist with pump selection, system design, hydraulic calculations, and technical support for your centrifugal pump project. We provide comprehensive documentation including pump curves, dimensional drawings, and installation manuals for all Horizontal Single-Stage Centrifugal Pump models.

Shanghai Chaodun Machinery Manufacturing Group Co., Ltd.
Professional manufacturer of industrial pumps, centrifugal pumps, and fluid handling systems for industrial, commercial, and municipal applications.