Immersion Multi-stage Centrifugal Pump

Introduction                                                      
The CRK series is a versatile pump designed for various applications. It can handle different types of liquids, from tap water to industrial fluids, under varying temperature and pressure conditions. The CRK model is suitable for non-corrosive liquids, while the CRK variant is ideal for slightly corrosive environments. Its applications span across water supply systems, industrial boosting, cooling systems, water treatment, and irrigation. It's used in waterworks for filtration and transport, high-rise buildings for pressure boosting, and in industrial settings such as cleaning systems, fire protection, and process flow systems.

Application
The CRK pump is ideal for conveying cooling, lubricating, and condensation fluids in machine tools, industrial cleaning equipment, and other situations where submersible pumps are required. It operates efficiently with a wide range of temperatures, flow rates, and pressures. It is particularly suited for low-corrosive liquid environments. It is commonly used in electric discharge machines, lathes, grinders, machining centers, cooling units, industrial cleaning systems, and filtration setups.
Operating Conditions
It handles thin, clean, non-explosive liquids without solid particles or fibers. It is suitable for water, cooling solutions, and cutting lubricants. The operating temperature ranges from -15°C to +70°C for normal temperature models and up to +120°C for hot water variants.
Pump Description
The CRK is a non-self-priming multi-stage centrifugal pump equipped with a standard motor. The motor shaft is directly connected to the pump shaft via a coupling. Optional intelligent protectors can be installed to prevent dry running, phase loss, and overload. To meet specific installation depth requirements, cavity bodies can be added to adjust the pump length. The dimensions and weight vary depending on the number of stages, as detailed in the product specifications table.
Motor Specifications
The motor is fully sealed, air-cooled, and features a 2-pole design. Protection class: IP55. Insulation class: F. Standard voltage options include 220V/380V/415V three-phase, 220V/240V single-phase, and 50Hz/60Hz frequencies. Custom voltage motors are available upon request. Single-phase motors with power ratings from 0.37 kW to 2.2 kW are also offered.

Product Details:

Performance Curve:
These performance curves apply under the following conditions:
1. All curves are based on measurements at 50Hz with a constant motor speed of 2900rpm or 2950rpm.
2. Curve tolerances comply with ISO9906 Annex A.
3. Measurements were taken using 20°C air-free water with a kinematic viscosity of 1 mm²/sec.
4. Pump operation should refer to the thickened curve to avoid overheating due to too low flow or motor overload due to excessive flow.

Section Drawing CRK2:


Section Drawing CRK4:


Section Drawing CRK8:

Section Drawing CRK12:

We also have CRK20 available, feel free to contact us if you need it.
Packing


We can provide detailed drawings upon request.

Question 1: Are you a factory or a trade company?
Answer: We are a factory and offer top-tier trade services.

Question 2: Can I get a sample before placing an order?
Answer: Yes, samples are available, but they are not free of charge.

Question 3: Where is your factory located? How can I visit there?
Answer: Our factory is located in Ningbo, China. You can fly directly to Ningbo or Shanghai airport. All our clients, both domestic and international, are welcome to visit us!

Question 4: How does your factory handle quality control?
Answer: Quality is our top priority. We maintain strict quality control throughout the entire production process. Our factory has obtained ISO9001 certification.

Question 5: What is the lead time?
Answer: Typically 10-50 days after receiving the prepayment.
Question 6: How can we make payment?
Answer: For small sample shipping costs, you can pay via PayPal or T/T. For large orders, T/T at sight is preferred.
Question 7: Is OEM available?
Answer: Yes, we offer OEM/ODM services for all our products.

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