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Soren200601009
JINGCHENG
3917290000 3904610000 3917390000
Polyurethane processing equipment often requires precise control of material delivery.
The transferred material may be supplied from a pump, metering unit or storage system before reaching a mixing or application component.
Depending on the polyurethane formulation, production conditions may involve controlled heating, limited working time or specific cleaning requirements.
These characteristics make the flexible transfer hose an important part of the equipment.
A hose that is too long may contain unnecessary material volume.
A hose with an unsuitable diameter may introduce excessive flow resistance.
A transfer line that is difficult to drain or clean may also complicate production changeover.
For this reason, selecting a polyurethane heated hose should involve more than identifying temperature and pressure.
The complete transfer-line design should also consider:
Material residence time, internal hose volume, cleaning requirements and the position of the hose within the PU processing system.
Jingcheng's polyurethane heated hose is designed for applications involving polyurethane machinery, including single-component and two-component processing equipment.
The product catalog specifies a maximum temperature capability of approximately:
180°C
and offers sizes ranging from 1/4" to 1".
This allows hose assemblies to be customized around different PU machine configurations.
Residence time refers to how long a material remains inside a processing system.
In PU equipment, the material may travel through:
Supply pumps
Metering systems
Flexible hoses
Distribution blocks
Mixing or dispensing components
The total material volume inside the system influences how long the material remains between different processing stages.
For some polyurethane formulations, this may be particularly important because material properties can change over time or after exposure to specific process conditions.
The exact sensitivity depends on the chemistry.
Therefore, the hose should be selected according to the material supplier's processing requirements.
A longer hose contains more material.
This may seem obvious, but the consequences become important during production.
Additional internal volume can influence:
Material hold-up
Startup filling
Changeover
Cleaning
Material recovery
In systems handling expensive or reactive formulations, unnecessary hose volume can increase material losses or cleaning requirements.
The hose should therefore be long enough to provide the necessary installation flexibility without creating excessive internal volume.
Hose diameter has a particularly important influence on internal volume.
For a circular flow passage, internal volume increases with the square of the internal diameter.
This means that increasing diameter can add a substantial amount of material capacity even when hose length remains unchanged.
However, reducing diameter also increases fluid resistance.
For viscous polyurethane materials, this can lead to greater pressure loss.
The optimal design therefore balances:
Required flow rate + acceptable pressure loss + minimum practical material volume.
The correct size depends on the PU formulation and equipment operating conditions.
The catalog identifies single-component polyurethane systems among the intended applications.
In single-component equipment, material may pass through a dedicated hose between the supply system and processing head.
For formulations that are sensitive to moisture, temperature or prolonged storage in the line, the operating procedure should account for those characteristics.
The hose should also be compatible with the specified cleaning or purging process.
A heated hose does not by itself prevent chemical curing or eliminate formulation-specific material limitations.
The product is also intended for two-component polyurethane machinery.
These systems commonly involve separate material streams before controlled mixing.
Depending on the equipment design, separate hoses may carry individual components toward the mixing unit.
The hoses should be specified according to the characteristics of each material.
In particular, the design should avoid unwanted cross-contamination between separate material circuits.
The connection geometry, cleaning strategy and material compatibility requirements should be determined for each side of the system.
The Jingcheng catalog specifies maximum temperature capability up to approximately:
180°C
This temperature rating allows the hose to be considered for polyurethane systems that require controlled heating.
However, the correct working temperature depends on the actual material.
Some PU formulations require elevated temperatures, while others may be processed at substantially lower temperatures.
The objective of a heated hose is to provide the thermal condition specified by the process.
Heating should not be increased simply because the hose is capable of operating at a higher maximum temperature.
The catalog describes heating elements arranged evenly around the hose.
The purpose is to reduce temperature differences along the hose wall.
This may be useful in polyurethane equipment where material flow properties are temperature-dependent.
The actual thermal performance of the assembly also depends on:
Heating power
Hose length
Inner diameter
Insulation
Ambient conditions
Material flow rate
For customized equipment, these parameters should be coordinated during design.
Polyurethane equipment may require specific maintenance procedures according to the material chemistry.
In some applications, residual material must be removed before the system is shut down or before a different material is introduced.
The cleaning strategy should be determined according to the material and equipment manufacturer.
Important questions include:
Can the material remain in the hose during shutdown?
Does the equipment require flushing?
Which cleaning medium is permitted?
What cleaning temperature is required?
How much material remains in the transfer line?
The answers can influence hose diameter, length and connection design.
A hose with lower unnecessary internal volume may reduce the amount of material that must be displaced during a cleaning operation.
PU hose connections may need to be disconnected during maintenance or material system servicing.
An unnecessarily complicated connection arrangement can increase maintenance work.
Custom hose assemblies can be manufactured with fittings selected according to the machine interface.
Depending on the project, these may include different thread standards, fitting angles or connection types.
The sealing materials and fitting construction should also be compatible with the transferred polyurethane components and cleaning media.
The catalog provides several nominal sizes.
Nominal size | Outer diameter | Working pressure | Minimum bending radius |
|---|---|---|---|
1/4" | 9 mm | 173 bar | 30 mm |
5/16" | 11 mm | 158 bar | 40 mm |
3/8" | 12.4 mm | 135 bar | 60 mm |
1/2" | 15.9 mm | 118 bar | 150 mm |
5/8" | 19 mm | 88 bar | 180 mm |
3/4" | 22.6 mm | 85 bar | 260 mm |
1" | 29.5 mm | 75 bar | 300 mm |
These are catalog reference values.
The pressure capability of a finished heated hose assembly should be confirmed at the actual operating temperature.
The correct size should also account for material flow requirements and installation space.
The minimum bending radius increases with hose diameter.
A larger hose can provide greater internal flow area but requires more room for routing.
For example, the catalog lists a minimum bending radius of approximately:
30 mm for 1/4" and 300 mm for 1".
Equipment designers should include these limits when determining the final machine layout.
The hose should not be twisted or forced into a bend directly behind the fitting.
Correct routing can reduce unnecessary mechanical stress and simplify maintenance.
PU processing lines may be stopped for different reasons.
These can include:
Material replacement
Equipment cleaning
Maintenance
Production scheduling
Process adjustments
During a stop, material remaining inside the transfer hose may experience changes depending on its chemical formulation and thermal environment.
The operating procedure should therefore define how long material may remain in the line and whether purging or cleaning is required.
The heated hose must be integrated into that procedure.
It should not be assumed that maintaining temperature alone will preserve every polyurethane formulation indefinitely.
Polyurethane is not one single material with universal processing conditions.
Different formulations may vary in:
Viscosity
Chemical compatibility
Processing temperature
Pot life or working time
Moisture sensitivity
Cleaning requirements
This means an equipment manufacturer should identify the actual material before finalizing the hose specification.
Where information is incomplete, the material supplier's technical data should be consulted.
Potential applications include:
Single-component PU processing systems
Two-component PU dispensing equipment
Polyurethane laminating machinery
PU material transfer modules
Industrial glue processing equipment
Customized production machinery
The catalog also identifies composite and laminating equipment as an application area.
A flexible heated hose can provide the connection between machine modules while supporting the required processing conditions.
Jingcheng can customize polyurethane heated hoses according to:
Inner diameter
Hose length
Operating temperature
Working pressure
End fittings
Thread standards
Electrical voltage
Heating power
Temperature sensor
Electrical connector
Cable length
Complete hose assembly requirements
For existing equipment, the original hose or technical drawing can be used as a reference.
To develop a customized polyurethane heated hose, please provide:
Polyurethane type
Single-component or two-component application
Material viscosity, if available
Required flow rate
Working temperature
Working pressure
Hose length
Inner diameter
Cleaning or purging requirements
Equipment model
End fittings
Voltage and heating power
Temperature sensor
Electrical connector
For reactive formulations, relevant material-handling information is particularly important.
Jingcheng specializes in customized industrial PTFE and heated hose assemblies.
Our capabilities include:
Factory-direct manufacturing
Custom hose lengths and diameters
OEM equipment integration
Electrical heating customization
Fitting development
Replacement hose matching
Engineering support
Sample orders
Short production lead times
Competitive factory pricing
International export experience
For PU equipment manufacturers, Jingcheng can develop hose assemblies according to the required mechanical, thermal and material-processing conditions.
The performance of a polyurethane transfer hose depends on more than its maximum temperature or pressure rating.
The length and internal diameter also influence material residence volume, pressure loss and cleaning requirements.
For single-component and two-component PU equipment, additional considerations may include material segregation, chemical compatibility and appropriate shutdown procedures.
Jingcheng's polyurethane heated hose provides customizable options for PU processing machinery with catalog temperature capability up to approximately 180°C.
The correct hose specification should balance:
Material chemistry + flow rate + internal volume + temperature + pressure + cleaning method + machine interface.
By considering these factors during equipment design, OEM manufacturers can create more practical and maintainable polyurethane material-transfer systems.
