Multistage Pump Impeller

The Multistage Pump Impeller is the core rotating component of a multi-stage centrifugal pump that achieves high-pressure output through synchronous rotation of multiple rotors. Unlike a single-stage pump with a single rotor, the rotors of a multi-stage pump are arranged in series on the same shaft. The liquid is accelerated by the first-stage rotor and then enters the diffuser (a flow straightening device) for rectification before being introduced to the secondary rotor. The energy is gradually accumulated at each stage, ultimately forming high pressure at the pump outlet. The number of rotors is determined by the required pressure and flow rate - the higher the pressure requirement, the more rotor stages there will be. The typical range is 2 to 12 stages (up to 20 stages is possible), and the single-stage head is usually 20 to 80 meters. Through cascading, the total head can reach up to 2400 meters.

Closed single suction structure: The impeller consists of the front cover plate, rear cover plate, blades and hub, forming a closed flow channel. It has high efficiency (guide vanes efficiency 85–92%), and is the mainstream form of multi-stage pumps.
Hydraulic model optimization: CFD simulation is used to optimize the blade outlet angle, blade angle, and flow channel profile to ensure inter-stage matching, with efficiency reaching 70–85% (high-performance type > 90%)
First-stage special design: For D80 and above specifications, a double suction first-stage suction impeller can be selected to improve anti-surge performance (NPSHr); symmetrically arranged back-to-back impellers can automatically balance axial force, suitable for media containing particles
Precision casting: Aluminum mold/resin sand precision molding, with real-time detection of material chemical composition
Heat treatment: Depending on the material, heat treatment such as normalizing, quenching + tempering is carried out to ensure mechanical properties

Multistage Pump Impeller​ Can precisely match the following mainstream models according to customer requirements:
Vertical Light Multi-stage Pump Series:
CDL/CDLF Series: 2–12 stages, flow rate 1–200 m³/h, head 6–300 m, impeller material SS304/316 or engineering plastic
DL Type Vertical Multi-stage: ≤10 stages, flow rate ≤200 m³/h, head ≤225 m, impeller material cast iron/stainless steel
DAB NKV Series: Up to 22 stages, flow rate 4–118 m³/h, head up to 319 m, impeller material AISI 304 stainless steel
Horizontal Industrial Multi-stage Pump Series:
D Type: 2–12 stages, flow rate 5–500 m³/h, pressure 10–80 bar (high performance up to 200+ bar)
DG Type Boiler Feedwater: Head up to 2150 m, medium temperature ≤160℃, CA6NM or alloy cast steel
DF/DY Type: Flow rate 6.3–346 m³/h, head 102–1056 m, stainless steel/dual-phase steel material
MD Series Horizontal Multi-stage: Head 300–1200 m, maximum working pressure 12 MPa, medium temperature maximum 180℃
API610 BB4 Ring-Section Multi-stage: Head up to 2400 m, pressure up to 27 MPa, temperature -30℃~210℃

Structural customization:
Primary double-suction impeller (improves NPSHr)
Back-to-back symmetrical arrangement (automatically balances axial force, suitable for media containing particles)
Series arrangement + balancing drum/disk (fully balances axial force, extends bearing life)
Half-open impeller (with trace solid conditions)
Custom service:
1:1 replication or hydraulic optimization based on provided drawings/samples
Reverse measurement: Send scanned modeling of worn impeller for reconstruction
Material upgrade: From gray cast iron → high chromium → stainless steel → duplex steel → alloy cast steel, all in a gradient selection
Dynamic balance grade: G6.3 (general use) or G2.5 (high-speed pumps)
OEM service: Cast customer brand logo
Complementary spare parts: Guide vanes, middle section, sealing ring, shaft sleeve, balance disc/balancing drum supplied as a complete set
Quality control documents: Spectral analysis report, hardness test report, dynamic balance report, size inspection report attached to each batch of shipment.

Q3: Which payment methods are supported?
Answer: T/T (30% deposit, balance before shipment).
Letter of Credit (irrevocable, accepted by major banks).
Western Union/Paypal (for small orders <$5,000).
Q4: How long is the delivery time?
Answer: Inventory pumps: 7 working days (from factory, standard specifications).
Customized pumps: 40 working days (including design, casting and testing).
Q5: What materials need to be provided for the quotation?
A: Flow rate (m³/h); Head (m); Medium; Solid content; pH value;
Maximum particle size (mm); Slurry density; Voltage (V); Frequency (Hz); Additional information.
Q6: Are OEM parts available?
Answer: Yes, we offer complete OEM/ODM support, including:
Material upgrades: Cr27-Cr30, natural rubber or polyurethane lining.
Design modifications: Impeller channels, sealing systems (packing and mechanical).
Performance adjustments: Efficiency optimization for specific slurry types.
Branding: Laser engraving or casting your logo.

Packaging: Customized packaging using core board and plywood boxes, featuring a sturdy and shock-resistant structure that precisely fits the dimensions of the slurry pump, ensuring zero damage during transportation and safe delivery to your doorstep.
Payment methods: Visa, Master Card, Western Union, T/T, L/C, Paypal and Alipay.
Logistics and transportation: Cooperating with international logistics companies such as DHL and Maersk, we offer multi-channel delivery solutions including Exw/Fob/Cif, covering 100+ countries/regions.

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