Rice Slurry Rotary Pump

For customers needing to transport rice slurry (rice flour mixed with water, viscosity 500 million, flow rate 1L/min, head 1.5m, 

room temperature), the CYB5-3Y rotary pump recommended by our technicians basically meets the core parameters. However, further 

confirmation of the viscosity unit, optimization of speed matching, and attention to the suitability of the sealing type and material are needed.

 The following is a detailed analysis:

I. Core Parameter Matching Analysis

Flow Rate Matching

Customer Requirement: 1L/min (i.e., 0.06m³/h)

Recommended Pump: CYB5-3Y, with a flow rate of 0.06m³/h, is a perfect match, ensuring stable transport.

Pressure and Head Matching

Customer Head Requirement: 1.5m (corresponding to approximately 0.015MPa pressure)

Recommended Pump: Discharge pressure 0.6MPa, far exceeding the requirement, with sufficient safety margin. However, it is necessary to

 confirm whether the viscosity affects the actual pressure requirement.

Speed Matching

Recommended Pump Type: 75 rpm

Key Issue: Viscosity 500 million (confirm unit is centipoise cP or millipascals mPa·s). If it's 50000 cP (50 Pa·s), it's a high-viscosity medium, 

usually requiring a lower speed (e.g., 50-150 rpm) to avoid cavitation and wear. 75 rpm is reasonable, but the pump type's adaptability to 

high viscosity needs verification.

II. Key Component and Operating Condition Compatibility

Material Selection

Pump Head Material: SS304 Stainless Steel

Applicability: Rice slurry is a food-grade medium; 304 stainless steel meets hygiene standards, but confirm if it's 304L (better corrosion 

resistance). If the rice slurry contains acid or salt, upgrading to 316L stainless steel is recommended.

Sealing Method

Sealing Method: Mechanical Seal

Recommendation: High-viscosity media tend to accumulate at the seal, leading to leakage or wear. Wear-resistant mechanical seals

 (e.g., silicon carbide/tungsten carbide materials) are recommended, or consider double-end mechanical seals to enhance reliability.

Drive Method

Drive Method: 2.2kW Variable Frequency Motor

Advantages: Variable frequency speed control can flexibly adapt to flow fluctuations, but it needs to be confirmed whether the motor

 power needs to be further increased due to high-viscosity media (high viscosity will lead to increased power demand).

III. Potential Risks and Optimization Suggestions

Viscosity Unit Confirmation

If the customer's viscosity unit is 50000 mPa·s (i.e., 50 Pa·s), it is considered extremely high viscosity. It needs to be confirmed whether 

the pump type supports this type of media (e.g., a single screw pump or a high-viscosity rotor pump may be more suitable).

Suggestion: Request the customer to provide the viscosity unit, or verify the pump's actual performance at 50000 cP through experiments.

Speed and Wear Balance

High-viscosity media require low speeds to reduce shear force and wear, but excessively low speeds may affect flow stability.

Suggestion: If 75 rpm causes flow fluctuations, it can be fine-tuned to a range of 50-100 rpm using the frequency converter.

Pipeline Design Optimization

High-viscosity media have poor flowability. It is necessary to ensure that the pipe diameter is sufficient (DN40 or above recommended) 

to reduce resistance and avoid sharp bends or excessive valves.

IV. Alternative Solutions

If the CYB5-3Y pump performs insufficiently at high viscosity, consider the following pump types:

Single Screw Pump

Advantages: Designed specifically for high-viscosity, solid-containing media, providing stable delivery and low wear.

Suitable for: Rice slurry containing small amounts of particles or fibers.

Gear Pump (e.g., NYP type)

Advantages: Simple structure, suitable for media with viscosity ≤100,000 cP.

Note: Wear-resistant gear materials (such as stainless steel or polymer composites) must be selected.

V. Summary

The CYB5-3Y rotary pump is recommended as it basically meets the requirements in terms of flow rate, pressure, and material. However, 

the following should be carefully confirmed:

Is the viscosity unit 50,000 cP?

The wear resistance of the mechanical seal?

Does the actual operating speed need further optimization?

If you would like to learn more about the specific selection and pricing of industrial pumps, food pumps, rotary pumps, and chemical 

pumps, please contact CIXIFM Winny: 

Email: sales01@cxflowmeter.com

WhatsApp: 008618049841995