Article Content
Product Overview
The IS/IR series single stage single suction centrifugal pumps are designed according to ISO2858 standards. These pumps adopt advanced hydraulic models and precision casting to provide high efficiency and reliable operation. The IS type is suitable for clean water or liquids similar to water, while the IR type is used for hot water applications. Both types feature a compact horizontal structure with stable performance, low noise, and convenient maintenance. They are widely used in water supply, drainage, industrial circulation, HVAC, and pressure boosting systems.
IS / IR Series Type Designation
(Example: IS80-65-160)
IS – Single stage clean water centrifugal pump
IR – Hot water pump
80 – Suction diameter (mm)
65 – Discharge diameter (mm)
160 – Impeller nominal diameter (mm)
Structure Description
The IS/IR pumps are horizontally installed, with suction at the front and discharge vertically upward. The pump casing and cover form a working chamber containing the impeller. The axial force is balanced by back blades or balancing holes. Bearings use grease lubrication for stable and long-term operation. The mechanical seal prevents leakage and is easy to replace. The pump and motor are connected by a flexible coupling, ensuring high concentricity and low vibration.
Structure Diagram
(Product image)
| No. | Part Name | No. | Part Name |
|---|---|---|---|
| 1 | Pump casing | 6 | Mechanical seal |
| 2 | Impeller | 7 | Shaft |
| 3 | Seal ring | 8 | Motor |
| 4 | Pump cover | 9 | Base |
| 5 | Bearing | – | – |
Performance Range
Flow: 1.5–1600 m³/h
Head: 5–150 m
Speed: 1450 or 2900 rpm
Power: 0.37–250 kW
Efficiency: up to 85%
Temperature: IS type ≤80°C, IR type ≤120°C
Performance Parameter (Excerpt)
| Model | Flow (m³/h) | Head (m) | Speed (r/min) | Power (kW) | Efficiency (%) | NPSHr (m) |
|---|---|---|---|---|---|---|
| IS50-32-125 | 12.5 | 20 | 2900 | 2.2 | 58 | 2.0 |
| IS65-50-160 | 25 | 32 | 2900 | 5.5 | 66 | 2.5 |
| IS80-65-200 | 50 | 50 | 2900 | 11 | 70 | 3.0 |
| IS100-80-250 | 100 | 80 | 1450 | 18.5 | 75 | 3.5 |
| IS150-125-315 | 200 | 120 | 1450 | 45 | 78 | 3.8 |
Assembly and Disassembly
Before assembling, clean all components and check alignment accuracy. During assembly, lubricate bearings properly and ensure seals are correctly positioned. Disassembly can be done by removing the coupling and sliding out the rotating parts without dismantling the casing. Replace worn seals and bearings when necessary.
Start, Stop and Run
1. Check rotation direction before startup.
2. Fill the pump with liquid and ensure the suction valve is open.
3. Start motor and gradually open the discharge valve.
4. During operation, observe bearing temperature (≤80°C) and vibration.
5. Stop the pump by closing the discharge valve, then cut power.
6. Drain water from casing when ambient temperature is below freezing.
Failure Causes and Solutions
Problem: Pump not discharging water
Cause: Air in suction line or incorrect rotation.
Solution: Vent air, correct motor wiring.
Problem: Low flow or head
Cause: Impeller wear or blockage.
Solution: Clean or replace impeller.
Problem: Leakage at seal
Cause: Seal wear or improper installation.
Solution: Replace seal and check alignment.
Problem: Vibration and noise
Cause: Misalignment or bearing wear.
Solution: Re-align coupling, replace bearings.
Problem: Motor overheating
Cause: Overload or voltage fluctuation.
Solution: Adjust operating conditions, ensure power stability.
Pipeline Friction Loss Table
(Excerpt from page 14)
Provides friction loss values for water flow rates (L/s) through pipes of 10–200 mm diameter. Data helps engineers design systems with accurate pressure calculations.
OEM & Custom Solutions
We offer OEM and ODM customization including material selection (cast iron, stainless steel, bronze), voltage (220V/415V/460V), and flange standard (DIN, ANSI, JIS). All pumps are ISO9001 and CE certified, suitable for global export and industrial projects. Optional control panels and VFD integration are available.
FAQs for Oversea Buyers
Q: What’s the difference between IS and IR pumps?
A: IS is for clean water up to 80°C, while IR is for hot water up to 120°C.
Q: What’s the flow and head range?
A: Flow 1.5–1600 m³/h and head 5–150 m depending on model.
Q: Can the pump run continuously?
A: Yes, it is designed for continuous 24-hour operation.
Q: What materials are available?
A: Cast iron standard, stainless steel or bronze optional.
Q: What’s the power range?
A: 0.37–250 kW depending on model and head.
Q: Do you provide OEM/ODM services?
A: Yes, we support full OEM customization including labeling and packaging.
Q: Which markets do you export to?
A: Southeast Asia, Middle East, Africa, South America, and Europe.