Self Priming Transfer Pump for Wastewater & Slurry

What is a Self-Priming Transfer Pump?

A self-priming transfer pump is a type of centrifugal pump designed to automatically evacuate air from the suction line and prime itself without manual filling before each start. Unlike standard centrifugal pumps, it retains liquid inside the pump casing after initial operation, enabling repeated starts with built-in suction capability of 3 to 7 meters. These pumps are specifically engineered to handle challenging fluids containing abrasive solid particles, slurries, suspended solids, and low-viscosity petroleum products. Key features include semi-open impellers, wear-resistant plates, and easy-access cleaning ports for convenient maintenance. Typical applications cover industrial wastewater, municipal drainage, marine services, and wastewater treatment plants, where reliability and solids-handling capability are essential.

The CYE series from Bơm Changyu exemplifies this technology with European-standard performance optimization, offering flow rates up to 468 m³/h, heads up to 55 meters, and temperature tolerance from -10°C to 150°C. Constructed from cast iron, ductile iron, or stainless steel options, these pumps accommodate media viscosity up to 50 mm²/s and solid particle sizes up to 76 mm. The direct-coupled motor design ensures high coaxial accuracy and stable operation while reducing footprint, delivering durable, low-maintenance performance for demanding slurry and wastewater applications across industrial and municipal sectors.

Engineered for the Toughest Slurry & Wastewater Applications

The CYE series is the ideal equipment for industrial and municipal applications where abrasive solids, suspended particles, and dirty liquids challenge pump reliability and uptime.

Compatible Media:
Sand-containing wastewater, slurry, suspended particle liquids, low-viscosity petroleum products, lime milk, sodium hydroxide solution, cleaning wastewater, cooling water, circulating water, flue gas purification system wastewater, industrial process water, oily wastewater, mine tailings slurry, and de-sulfurization wastewater.

Municipal Engineering

Sewage lifting stations, rainwater drainage, and municipal wastewater collection systems.

Industrial Manufacturing

Factory wastewater discharge, cooling water circulation, parts cleaning systems, and process water transfer.

Xử lý nước thải

Lime milk dosing, primary sludge transfer, flocculant solution handling, and treated effluent discharge.

Marine & Shipping

Bilge water pumping, ballast water transfer, and seawater cooling systems.

For applications not listed above or requiring specific operating conditions:

We recommend contacting Changyu Pump to obtain a solution tailored to your specific slurry composition, flow rate, head requirements, and installation environment.

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Advantages of the Self Priming Transfer Pump

Excellent Abrasion Resistance

Built-in wear-resistant plate and semi-open impeller design effectively handle sand, slurry, and abrasive solids, extending pump service life.

Strong Self-Priming Capability

Self-priming height up to 7 meters, automatically evacuates air from suction line, no manual priming required before each start.

Easy Maintenance & Cleaning

Special inspection port on pump casing allows quick debris removal and routine servicing without disassembling the pump.

Compact & Space-Saving

Motor shaft directly inserts into pump shaft for high coaxial accuracy, shorter axial length, and reduced equipment footprint.

We provide complete technical documentation, selection guidance, and engineering support to help you find the right fit for your specific slurry application. Customised designs are available for unique head, flow, or corrosion requirements.

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CYE Series Self Priming Transfer Pump Specifications

Our company manufactures CYE Series Self Priming Pumps, which are capable of continuously conveying a wide range of abrasive and solids-laden media—including sand-containing wastewater, slurry, suspended particle liquids, lime milk, sodium hydroxide solution, low-viscosity petroleum products, and various industrial wastewaters—under temperatures ranging from -10°C to 150°C. The pump body is designed with a semi-open impeller, built-in wear-resistant plate, and a dedicated inspection port, combining the advantages of easy maintenance and high durability to offer exceptional abrasion resistance, stable operation, and convenient servicing. This product features a direct-coupled motor design for high coaxial accuracy, strong self-priming capability up to 7 meters, a compact structure with reduced footprint, reliable performance, ease of use and maintenance, and efficient hydraulic design for energy savings. It is widely applied in municipal engineering, industrial manufacturing, wastewater treatment, marine shipping, mining, and power generation industries.

• Phụ tùng
• Troubleshooting

Phụ tùng

The product employs a drive configuration in which the motor shaft is inserted directly into the bore of the pump shaft, ensuring high coaxiality. Combined with an impeller design that has undergone dynamic and static balancing, this ensures smoother and more reliable operation. The unit is fitted with an IEC-standard three-phase motor, which further reduces the axial dimensions compared to conventional designs, thereby minimising the equipment’s footprint. Furthermore, certain units feature a coupling connection and IEC-standard mounting, facilitating future maintenance and servicing.

Pump Structural Features

Thiết kế: Performance and dimensions conform to European standards.
Structural Type: Semi-open impeller; the pump casing features a maintenance port and is equipped with a wear plate; single-stage, self-priming centrifugal pump.
Flanges: For inlet and outlet diameters of 100 mm or less, threaded flanges are utilized; for diameters exceeding 100 mm, non-standard flanges are used (supplied as an integral part of the pump).
Shaft Seal: Mechanical seal.
Vòng bi: High-quality imported bearings are selected, utilizing grease lubrication.

Main Component Materials

• Thân bơm: Standard material is grey cast iron; optional material is ductile iron
• Cánh quạt: Standard material is ductile iron; optional materials are bronze and 304/316 stainless steel
• Trục: Standard material is 45# steel; optional materials are 2Cr13, 40Cr, 304 and 316 stainless steel
• Shaft sleeve: Standard material is 304 stainless steel; optional material is 316 stainless steel
• Phớt trục: Standard material is mechanical seal

Note: Special materials can be customised upon request

Model Designation

Ví dụ:
CYE (          ) – (          )
      |                    |
  Series Code     Discharge Dia. (mm)   –   Nominal Impeller Dia. (mm)

Ví dụ:
CYE40-110 indicates a pump with 40mm inlet/outlet diameter and 110mm nominal impeller diameter.

Pump Rotation Direction:
Clockwise when viewed from the drive end (counterclockwise when viewed from the pump inlet).

For more product models and information, please download our product catalog.

CYE Self Priming Transfer PumpTải xuống

Troubleshooting: Causes and Solutions

Vấn đề	Cause	Giải pháp
Pump fails to deliver water	Inlet valve not opened; pipeline or impeller clogged Wrong motor rotation direction; phase loss; low speed Suction pipe leaking Air in pump chamber Insufficient inlet water supply; excessive suction lift; foot valve leaking Excessive pipeline resistance; wrong pump selection	Check and remove clogging Adjust motor direction; tighten wiring Tighten seals; remove air Open cover or vent valve to release air Stop and inspect/adjust Reduce pipe bends; reselect pump
Excessive noise and vibration	Unstable base/foundation Bent pump shaft Hiện tượng xâm thực Worn bearings Debris in suction line Misalignment between pump and motor shafts	Reinforce foundation Replace or straighten shaft Adjust operating conditions Replace bearings Remove debris Realign shafts
Insufficient flow rate	Same causes as “pump fails to deliver water” Clogged impeller channel or suction pipe; partially closed valve Worn impeller or wear plate Insufficient power or low speed	Apply solutions from problem #1 Remove clogging; readjust valve opening Replace worn parts Increase power; adjust to rated speed
Excessive shaft power consumption	Operating above rated flow Độ hút quá mức Damaged bearings Bent shaft or impeller rubbing/catching Blocked or jammed internal flow path	Reduce flow; partially close discharge valve Lower installation height Replace bearings Replace or straighten shaft; clear jams Remove blockage
Động cơ quá nhiệt	Excessive flow causing overload Mechanical interference Damaged motor bearings Insufficient voltage	Partially close discharge valve Inspect and clear interference Replace bearings Stabilize voltage supply
Pump leaking	Worn mechanical seal Porosity or crack in pump casing Uneven sealing surface Loose mounting bolts	Thay thế phớt cơ khí Weld or replace casing Resurface sealing surface Tighten bolts

Why Choose Changyu Pump?

1. Deep Experience & Reliable Certifications
   Với 21 years of OEM/ODM experience, Changyu Pump is a professional pump and valve manufacturer. The company holds ISO 9001, CE, and ATEX certifications and has over 25 patented technologies, ensuring strict quality and safety standards.
2. Broad Product Line & Customization Capability
   We offer 14 series and more than 100 varieties of pumps and valves, including PTFE-coated pumps, UHMWPE slurry pumps, and stainless steel pumps. We provide reliable solutions for corrosive media, abrasive slurries, clean water, and various industrial applications.
3. Advanced Manufacturing & Quality Assurance
   Our factory is located in the Yangtze River Delta Integrated Intelligent Manufacturing Base, equipped with advanced production facilities. We support OEM/ODM customization to meet special material and operating condition requirements.
4. Professional Team & Fast Response
   Our experienced technical team provides full support from selection to after-sales service. We are committed to a 24-hour response to inquiries and technical consultations, with one-on-one customer service.

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