The Role of Peristaltic Pump Tubing in Biopharmaceutical Manufacturing

Peristaltic pump tubing is a critical component in biopharmaceutical fluid handling systems. It works with a peristaltic pump by using rotating rollers to compress flexible tubing and move liquid through the tube. This pumping method supports controlled fluid transfer while minimizing direct contact between the process fluid and the pump mechanism.

The Role of Peristaltic Pump Tubing in Biopharmaceutical Manufacturing

Peristaltic pump tubing is a critical component in biopharmaceutical fluid handling systems. It works with a peristaltic pump by using rotating rollers to compress flexible tubing and move liquid through the tube. This pumping method supports controlled fluid transfer while minimizing direct contact between the process fluid and the pump mechanism.

In biopharmaceutical manufacturing, peristaltic pump tubing can influence product cleanliness, flow accuracy, process stability, cell viability, and contamination control. Selecting the correct tubing material, size, structure, and service life is therefore essential for reliable fluid handling.

1. What Is Peristaltic Pump Tubing?

Peristaltic pump tubing is a flexible tube installed inside the pump head of a peristaltic pump. It is commonly manufactured from silicone, thermoplastic elastomers, or other materials with suitable elasticity and recovery performance.

During operation, the pump rollers compress the tubing in sequence. This creates a moving closed section inside the tube and pushes the liquid toward the outlet. Once the roller passes, the tubing returns to its original shape and allows additional liquid to enter.

The basic pumping process includes:

1. The pump roller compresses the tubing.

2. A temporary closed section is formed inside the tube.

3. The liquid is pushed forward.

4. The tubing recovers its original shape.

5. New liquid enters the tubing.

6. The pumping cycle continues.

Because the process fluid mainly contacts the inner surface of the tubing, the pump is suitable for many applications where cleanliness, controlled transfer, and flexible system configuration are important.

2. Main Functions of Peristaltic Pump Tubing in Biopharmaceutical Applications

2.1 Supporting Clean and Controlled Fluid Transfer

Peristaltic pump tubing provides a closed flow path for transporting process liquids. It helps reduce direct contact between the fluid and the pump housing, mechanical seals, impellers, and other internal components.

Typical biopharmaceutical fluids include:

• Cell culture media

• Buffer solutions

• Protein solutions

• Vaccine-related process fluids

• Enzyme solutions

• Nutrient solutions

• Pharmaceutical intermediates

• Purified water and process water

• Cleaning solutions

• Formulation and filling liquids

For sterile processing, peristaltic pump tubing may be used as part of a single-use fluid path or a cleanable process system. However, tubing should not automatically be considered sterile simply because it is used in a peristaltic pump. Sterility depends on the tubing material, manufacturing environment, packaging, sterilization method, and relevant validation documentation.

2.2 Reducing Cross-Contamination Risks

One major advantage of peristaltic pumping is that the process fluid is mainly contained inside the tubing rather than inside a complex pump chamber.

In conventional pump designs, the liquid may contact impellers, seals, pump chambers, and other components. If cleaning or sterilization is insufficient, residues may remain and create cross-contamination risks.

With peristaltic pump tubing, the fluid path can be replaced or configured as a single-use assembly. This can simplify process changeover between different products or batches.

Typical applications include:

• Batch-to-batch fluid transfer

• Multi-product biopharmaceutical manufacturing

• Laboratory and pilot-scale production

• Single-use bioreactor systems

• Culture media transfer

• Buffer preparation and transfer

• Closed fluid handling systems

• Filling and dispensing operations

The use of replaceable tubing does not eliminate the need for process validation, but it can reduce the complexity of cleaning and sterilization procedures.

2.3 Providing Stable and Accurate Flow Control

Peristaltic pumps regulate fluid flow by controlling pump speed, roller movement, tubing size, and compression conditions.

This makes them suitable for processes requiring controlled fluid addition or repeatable flow, such as:

• Culture media feeding

• Buffer transfer

• Reagent dosing

• Nutrient addition

• Cell culture feeding

• Laboratory sampling

• Small-volume dispensing

• Pharmaceutical filling

The tubing inner diameter, wall thickness, elasticity, and recovery characteristics can directly affect the actual flow rate. If the tubing becomes fatigued or permanently deformed, flow accuracy may decrease.

For accurate dosing applications, the tubing should be selected according to:

• Required flow rate

• Pump head model

• Operating speed

• Tubing inner diameter

• Tubing wall thickness

• Fluid viscosity

• Back pressure

• Required operating time

Flow calibration is recommended when the process requires high dosing accuracy or repeatable batch performance.

2.4 Helping Reduce Mechanical Stress on Sensitive Fluids

Some biopharmaceutical products are sensitive to mechanical shear, temperature changes, and excessive turbulence. Examples may include cells, proteins, vaccines, and other biological materials.

A peristaltic pump transfers liquid through the compression and recovery of flexible tubing rather than using a high-speed impeller directly inside the process fluid. Under suitable operating conditions, this may help reduce certain mechanical effects on sensitive fluids.

For cell culture media and cell suspensions, the following factors should be evaluated:

• Cell type

• Cell concentration

• Cell size

• Fluid viscosity

• Pump speed

• Tubing inner diameter

• Transfer time

• Number of pumping cycles

• Tubing surface condition

Peristaltic pumping does not guarantee zero shear stress. The actual effect depends on the pump design, tubing, flow rate, pressure, and biological material. Cell viability and product quality should be verified through process testing.

2.5 Supporting Single-Use Bioprocessing Systems

Single-use bioprocessing systems commonly use disposable bags, tubing assemblies, filters, connectors, and other fluid-handling components.

Peristaltic pump tubing can be integrated into these systems to create a flexible and replaceable fluid path.

Typical applications include:

• Single-use bioreactors

• Disposable mixing and storage bags

• Single-use buffer preparation systems

• Cell culture systems

• Disposable transfer assemblies

• Filling systems

• Sampling systems

• Process development equipment

In these applications, the tubing should provide suitable flexibility, recovery performance, cleanliness, and dimensional consistency. The tubing must also be compatible with the pump head, connectors, bags, filters, and other components in the assembly.

3. Common Materials Used for Peristaltic Pump Tubing

3.1 Platinum-Cured Silicone Tubing

Platinum-cured silicone tubing is widely used in biopharmaceutical, medical, laboratory, and high-purity fluid handling applications.

Its typical characteristics include:

• Excellent flexibility

• Good elastic recovery

• Smooth inner surface

• Wide operating temperature range

• Good suitability for many aqueous fluids

• Low risk of metal contamination

• Easy visual inspection when supplied in a transparent design

• Compatibility with selected clean and sterile processes

Depending on the specific product, platinum-cured silicone tubing may be supplied with documentation related to FDA, USP Class VI, BFR, ISO 10993, or other requirements.

These standards should always be confirmed against the actual product specification and test documentation. Not every silicone tube automatically meets every pharmaceutical or medical requirement.

Typical applications include:

• Biopharmaceutical fluid transfer

• Cell culture media delivery

• Laboratory peristaltic pumps

• Pharmaceutical processing

• Medical equipment

• Food and beverage processing

• High-purity water transfer

3.2 Thermoplastic Elastomer Tubing

Thermoplastic elastomer tubing is also used in single-use bioprocessing and high-frequency pumping applications.

Depending on the formulation, it may offer:

• Good resistance to repeated compression

• Suitable elastic recovery

• Low extractables for selected grades

• Good transparency

• Compatibility with single-use fluid systems

• Different hardness options

• Good weldability or connection compatibility in selected designs

The performance of thermoplastic elastomers varies significantly between formulations. Chemical resistance, temperature capability, extractables, and fatigue life should be verified for the actual product rather than judged only by the material name.

3.3 Reinforced Peristaltic Pump Tubing

Some special-purpose tubing products use reinforcement layers to improve pressure resistance or mechanical stability.

Reinforcement materials may include:

• Polyester fibers

• Aramid fibers

• Other high-strength textile materials

Reinforcement can improve resistance to certain mechanical loads, but it may also affect flexibility, compression behavior, and pump-head compatibility.

For peristaltic pump applications, reinforced tubing must be carefully matched with the pump head. A tubing design with higher pressure resistance is not necessarily the best choice if it cannot be compressed and recovered properly during repeated pumping.

4. Key Factors When Selecting Peristaltic Pump Tubing

4.1 Inner Diameter and Wall Thickness

The tubing inner diameter influences flow rate and fluid velocity, while wall thickness affects compression, recovery, and service life.

Before selecting tubing, confirm:

• Pump head tubing requirements

• Target flow rate

• Fluid viscosity

• Operating speed

• Tubing wall thickness

• Compression gap

• Maximum allowable back pressure

Incorrect tubing dimensions may cause unstable flow, incomplete tube closure, leakage, excessive wear, or reduced pumping efficiency.

4.2 Chemical Compatibility

The tubing material must be compatible with the actual process fluid. Different buffers, cleaning agents, solvents, and pharmaceutical formulations can affect tubing materials in different ways.

Important factors include:

• Chemical composition

• pH value

• Temperature

• Concentration

• Contact time

• Flow rate

• Presence of organic solvents

• Presence of proteins, cells, or particles

For strong acids, strong alkalis, organic solvents, or special pharmaceutical formulations, compatibility testing should be performed under actual or simulated process conditions.

4.3 Temperature and Sterilization Method

Biopharmaceutical systems may use different sterilization and sanitization methods, including:

• Steam sterilization

• Autoclaving

• In-line sterilization

• Gamma irradiation

• Electron-beam irradiation

• Chemical sanitization

Different tubing materials have different levels of resistance to these methods. Selection should consider:

• Continuous operating temperature

• Short-term temperature exposure

• Steam exposure

• Number of sterilization cycles

• Gamma or electron-beam exposure

• Changes in hardness after sterilization

• Changes in elasticity

• Dimensional stability

• Color or surface changes

For reusable tubing, the effect of repeated sterilization on elastic recovery and fatigue life should be evaluated.

4.4 Pumping Frequency and Service Life

Peristaltic pump tubing is a consumable component because it is repeatedly compressed by the pump rollers.

Its service life depends on:

• Pump speed

• Roller design

• Compression level

• Fluid temperature

• Chemical exposure

• Tubing hardness

• Back pressure

• Continuous operating time

• Installation conditions

A preventive replacement schedule should be established for critical processes. Tubing should not be replaced only after leakage or rupture occurs.

4.5 Biocompatibility and Cleanliness

Tubing used in biopharmaceutical applications should be evaluated according to the cleanliness requirements of the final product and process.

Common evaluation points include:

• Biocompatibility

• Extractables and leachables

• Inner surface cleanliness

• Particle shedding

• Material stability

• Odor and discoloration

• Batch consistency

• Sterilization compatibility

• Regulatory and quality documentation

For high-value pharmaceutical fluids, cell culture media, and biological products, tubing with traceable material information and quality documentation should be selected.

5. Applications of Peristaltic Pump Tubing in Biopharmaceutical Processing

5.1 Cell Culture

Peristaltic pump tubing can be used for culture media delivery, nutrient feeding, culture fluid transfer, and other cell culture operations.

The main requirements typically include:

• Low extractables

• Good flexibility

• Stable flow

• Suitable inner diameter

• Low risk of cell damage

• Good cleanliness

• Consistent performance

The tubing and pump parameters should be validated according to the cell type and process conditions.

5.2 Bioreactor Feeding and Media Addition

In bioreactor systems, peristaltic pump tubing is commonly used to deliver culture media, buffer solutions, pH adjustment solutions, and other process fluids.

By controlling pump speed, the system can provide:

• Continuous feeding

• Intermittent feeding

• Programmed dosing

• Controlled nutrient addition

• Reproducible fluid transfer

The tubing must be compatible with the fluid and capable of maintaining stable performance throughout the process.

5.3 Protein and Biological Product Transfer

Proteins, antibodies, and other biological products may be sensitive to shear, temperature, adsorption, and material contact.

Peristaltic pump tubing can provide a closed transfer path, but the following factors should be assessed:

• Pump speed

• Air bubble formation

• Product adsorption

• Extractables and leachables

• Material compatibility

• Product activity

• Tubing inner surface condition

• Transfer duration

Actual product recovery and biological activity should be verified during process development and validation.

5.4 Filling and Dosing

Peristaltic pumps are used in laboratory filling, small-batch filling, and selected pharmaceutical filling systems.

In these applications, tubing performance may influence:

• Filling volume

• Dosing accuracy

• Flow consistency

• Dripping

• Product hold-up

• Residual volume

• Changeover efficiency

For high-accuracy filling, tubing size, pump-head design, fluid viscosity, pump speed, and tubing condition should be evaluated together.

5.5 Laboratory Analysis and Testing Equipment

Peristaltic pump tubing is also used in laboratory and analytical equipment for:

• Reagent delivery

• Sample transfer

• Buffer circulation

• Instrument feeding

• Cleaning solution transfer

• Low-flow dosing

• Process sampling

Laboratory applications often require small dimensions, good transparency, stable elasticity, and convenient replacement.

6. Difference Between Peristaltic Pump Tubing and Standard Silicone Tubing

Peristaltic pump tubing is designed to withstand repeated compression and recovery inside a pump head. Standard silicone tubing is generally designed for fluid transfer, connection, or drainage and may not have sufficient fatigue resistance for continuous peristaltic pumping.

A standard silicone tube should not automatically be used as a substitute for peristaltic pump tubing. Even when the dimensions appear similar, insufficient recovery or fatigue resistance may result in unstable flow and premature failure.

7. How to Improve Peristaltic Pump Tubing Performance

7.1 Match the Tubing to the Pump Head

Confirm that the tubing inner diameter, wall thickness, hardness, and elasticity meet the pump head requirements.

7.2 Control Pump Speed and Back Pressure

Operate within the recommended speed and pressure range. Excessive speed or back pressure can accelerate tubing fatigue.

7.3 Avoid Excessive Bending and Twisting

The tubing should be installed without sharp bends, twisting, flattening, or external tension, especially near the pump inlet and outlet.

7.4 Inspect Tubing Regularly

Check for:

• Surface cracks

• Hardening

• Wall thinning

• Permanent deformation

• Reduced flow

• Leakage

• Discoloration

• Changes in elastic recovery

• Particles or abnormalities on the inner surface

7.5 Establish a Preventive Replacement Schedule

For critical processes, tubing replacement should be based on pump speed, operating time, cycle count, process risk, and historical performance data.

7.6 Maintain Batch and Material Traceability

For biopharmaceutical use, it is recommended to retain tubing batch numbers, material information, sterilization records, and usage records for quality control and traceability.

8. Peristaltic Pump Tubing Solutions from CJan Fluid Technology

CJan Fluid Technology Co., Ltd. provides fluid handling products for biopharmaceutical, laboratory, food, medical, and high-purity applications.

For peristaltic pumping and clean fluid transfer, product selection may focus on:

• Platinum-cured silicone peristaltic pump tubing

• Biopharmaceutical-grade silicone tubing

• High-purity flexible tubing

• Single-use bioprocess tubing

• Cell culture media transfer tubing

• Pharmaceutical dosing tubing

• Laboratory fluid handling tubing

• Food-grade and medical fluid transfer tubing

The correct tubing should be selected according to the process fluid, temperature, flow rate, pump-head model, operating time, sterilization method, and cleanliness requirements.

9. Frequently Asked Questions

1. Why is peristaltic pump tubing suitable for biopharmaceutical applications?

Peristaltic pump tubing is suitable for biopharmaceutical applications because it provides a closed fluid path, reduces direct contact between the process fluid and the pump mechanism, and supports controlled fluid transfer.

2. Must biopharmaceutical processes use silicone peristaltic pump tubing?

Biopharmaceutical processes do not always require silicone tubing. Thermoplastic elastomers and other materials may also be suitable, depending on chemical compatibility, cleanliness, sterilization requirements, and pumping fatigue resistance.

3. Can platinum-cured silicone tubing be used in sterile processes?

Some platinum-cured silicone tubing products are suitable for sterile processes, but this must be confirmed through product documentation, cleanliness data, sterilization compatibility, and process validation.

4. How often should peristaltic pump tubing be replaced?

Replacement frequency depends on pump speed, compression, fluid, temperature, back pressure, operating time, and process requirements. Critical applications should use a preventive replacement schedule based on actual operating data.

5. Can standard silicone tubing replace peristaltic pump tubing?

Standard silicone tubing cannot automatically replace peristaltic pump tubing because peristaltic tubing must withstand repeated compression and recovery while maintaining stable dimensions and flow performance.

6. How can users determine whether peristaltic pump tubing needs replacement?

Tubing should be evaluated for flow fluctuations, reduced recovery, wall thinning, cracks, deformation, leakage, discoloration, and changes in operating time. Replacement should be considered when any of these conditions affect process reliability.

Conclusion

Peristaltic pump tubing is more than a simple fluid transfer component in biopharmaceutical manufacturing. It is an important part of contamination control, flow accuracy, product protection, and process stability.

With a suitable tubing material and correct pump configuration, peristaltic pumping can support closed fluid transfer, controlled dosing, single-use processing, cell culture, bioreactor feeding, laboratory testing, and pharmaceutical filling.

The most important selection factors include tubing material, inner diameter, wall thickness, elastic recovery, chemical compatibility, sterilization resistance, fatigue life, and cleanliness documentation.

CJan Fluid Technology Co., Ltd. can support customers in selecting peristaltic pump tubing and related fluid handling products for biopharmaceutical, laboratory, and high-purity fluid transfer applications.

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