Polyurethane Heated Hose Selection Based on Pressure, Temperature and Equipment Connection

A polyurethane hose should not be selected according to temperature alone.

PU processing equipment may also impose specific requirements for:

• Pressure

• Hose diameter

• Length

• Bending radius

• Connection type

• Heating power

If one of these parameters is incorrectly matched, the hose may physically connect to the machine but still perform poorly in the actual process.

Jingcheng’s polyurethane heated hose is designed for various PU equipment, including single-component and two-component polyurethane systems and associated connection equipment.

The catalog specifies a maximum temperature of approximately:

180°C

and provides inner diameters from approximately 1/4" to 1".

The product is therefore suitable for customized PU equipment where both thermal and mechanical parameters need to be coordinated.

Temperature Is Only One Part of Hose Selection

Because this is a heated hose, it is easy to focus primarily on temperature.

However, the complete hose must also operate within the required pressure range.

A hose that can reach the correct temperature but does not match the required pressure is not a suitable solution.

Similarly, a hose with very high pressure capability may be unnecessarily stiff or oversized for a low-pressure machine.

The correct selection requires a balanced specification.

Maximum Temperature Up to 180°C

The catalog gives a maximum temperature of approximately:

180°C

for this polyurethane heated hose family.

Customers requiring a different temperature range should confirm the specification during customization.

The actual operating temperature should be defined according to the PU equipment and material process rather than simply using the hose’s maximum capability.

Working Pressure Varies by Hose Diameter

The catalog provides several size options.

Approximate working pressures include:

• 1/4" — 173 bar / 2,501 psi

• 5/16" — 158 bar / 2,284 psi

• 3/8" — 135 bar / 1,958 psi

• 1/2" — 118 bar / 1,704 psi

• 5/8" — 88 bar / 1,269 psi

• 3/4" — 85 bar / 1,234 psi

• 1" — 75 bar / 1,088 psi

This shows that pressure capability decreases as hose diameter becomes larger.

Therefore, diameter and pressure should be selected together.

Hose Diameter Should Match the Equipment Requirement

A smaller internal diameter offers:

• Compact size

• Lower hose volume

• Smaller bending radius

A larger diameter provides more internal flow area.

However, larger hose also increases:

• External diameter

• Weight

• Minimum bending radius

• Internal material volume

For this reason, hose size should be based on the equipment requirement rather than choosing a diameter simply because it is available.

Bending Radius Influences Equipment Layout

The catalog lists minimum bending radii from approximately:

• 1/4" — 30 mm

• 5/16" — 40 mm

• 3/8" — 60 mm

• 1/2" — 150 mm

• 5/8" — 180 mm

• 3/4" — 260 mm

• 1" — 300 mm

These values are important when designing PU equipment.

A 1-inch hose, for example, requires substantially more installation space than a 1/4-inch hose.

Machine designers should consider routing space before finalizing the hose diameter.

Single-Component PU Equipment May Use Different Hose Configurations

The catalog states that the hose is widely used for different kinds of glue machines and single-component polyurethane equipment.

In these systems, the hose may form the connection between different sections of the material-handling equipment.

The required specification depends on the machine design.

Possible differences include:

• Hose length

• Port connection

• Heating requirement

• Electrical plug

This makes customization important even when the same nominal diameter is used.

Two-Component PU Machines Require Accurate Hose Matching

The product is also intended for two-component PU equipment.

When a machine contains multiple material lines, each line may require a specific configuration.

The hoses should therefore be identified clearly according to their individual circuit.

OEM manufacturers may specify different:

• Lengths

• Diameters

• Connections

• Heating parameters

for different positions in the same machine.

Connection Design Should Be Confirmed Before Production

PU equipment from different manufacturers can use different connection interfaces.

Customers should confirm both hose ends before manufacturing.

Important information includes:

• Thread type

• Male or female connection

• Fitting angle

• Sealing method

• Required swivel connection

For replacement projects, photographs of both hose ends can help initial identification.

Uniform Heating Along the Hose

The source product states that heating elements are arranged uniformly around the hose.

The purpose is to reduce internal wall temperature differences.

A controlled thermal path is especially important when the hose is used between two pieces of PU processing equipment.

Rather than having the material pass through an unheated flexible section, the hose can maintain the required thermal condition through the connection.

Insulation Helps Retain Generated Heat

The heating structure is surrounded by insulation.

This helps reduce heat loss through the outside of the hose.

The catalog also states that high-efficiency insulation materials can be used when the external surface temperature needs greater consideration.

This allows the outer construction to be adjusted according to machine requirements.

Hose Length Should Be Defined by Machine Layout

The hose should be long enough to connect the equipment without excessive mechanical stress.

At the same time, unnecessarily long hose increases:

• Material volume

• Heating area

• Weight

• Installation complexity

For OEM machinery, hose length should ideally be determined from the final equipment layout rather than estimated before machine design is complete.

Electrical Parameters Must Match the Control System

A customized polyurethane heated hose may require confirmation of:

• Voltage

• Heating power

• Sensor

• Electrical plug

• Pin configuration

• Power lead length

This is particularly important when producing replacement hoses for existing equipment.

An electrical connector that appears similar externally may have a different wiring configuration.

Replacement Hose Development

If the original PU hose specification is incomplete, customers can provide:

• Existing hose photos

• Machine model

• Hose dimensions

• Fitting photos

• Connector photos

• Working temperature

• Working pressure

This information can be used to begin technical matching.

OEM Customization Options

Jingcheng can customize:

• Hose diameter

• Hose length

• Temperature

• Voltage

• Power

• Fittings

• Thread standards

• Temperature sensors

• Electrical connectors

• Cable length

• Complete PU hose assemblies

Why Choose Jingcheng

Jingcheng manufactures PTFE hoses and heated hose systems for various industrial machines.

For polyurethane equipment projects, advantages include:

• Direct manufacturing

• Single- and two-component equipment support

• OEM customization

• Replacement hose development

• Engineering assistance

• Sample support

• Short lead time

• Competitive pricing

• International export experience

Conclusion

Selecting a polyurethane heated hose is a multi-parameter engineering task.

Temperature is important, but it must be considered together with:

pressure, diameter, hose length, bending radius, fittings and electrical configuration.

Jingcheng’s polyurethane heated hose family covers several sizes from approximately 1/4" to 1", with a catalog maximum temperature of approximately 180°C.

For single-component machines, two-component PU systems and replacement projects, customizing the hose around the actual equipment interfaces provides a more reliable solution than selecting by temperature or diameter alone.