PTFE hoses

What are the properties of PTFE hose?

The key properties of PTFE hose are its high chemical resistance and a wide range of operating temperatures. PTFE hose has several important properties that make it an extremely versatile and attractive technical hose for industry. We list each of them below:

• very high chemical resistance - it can withstand contact with concentrated (very aggressive) acids and bases, as well as all known solvents without losing its properties; 
• wide range of permissible operating temperatures - PTFE hoses are suitable for use in temperatures from -70 to 260 degrees Celsius (however, from 130 degrees Celsius there is a gradual decrease in pressure and mechanical properties); 
• resistance to ageing and weathering - as Teflon does not absorb water, and remains insensitive to ozone, oxygen and UV radiation, PTFE hoses are suitable for use in various conditions, even several decades of regular atmospheric changes will not change the properties of this material; 
• low coefficient of friction and surface energy - this feature means that substances do not adhere to the walls of the hoses, so the latter have self-cleaning properties and guarantee a high degree of hygiene; 
• high electrical resistance - this is a property that can be dangerous when transporting a substance that is a poor conductor (in which case an antistatic PTFE blend with graphite is used); 
• self-extinguishing properties - PTFE hose self-extinguishes when the source of fire is cut off and does not spread fire; 
• moderate abrasion resistance - this makes it possible to transport moderately abrasive substances.

How are PTFE hoses constructed?

PTFE hoses are constructed in different ways, depending on the type and purpose of the hose. There are four basic varieties:

• corrugated and smooth-walled PTFE hoses without a braid (not reinforced) - are used for low-pressure operation, in addition (as they have a semi-transparent wall) they allow visual control of the flow of the medium; 
• smooth-walled braided PTFE hoses (usually made of stainless steel) - have one or two layers of reinforcement and are suitable for use with virtually all media in any industry, which is due to the fact that they combine the versatility of Teflon with the ability to withstand operating pressures of up to 400 bar; 
• corrugated braided PTFE hoses (made of stainless steel or other materials) - similar to the smooth-walled variety with reinforcement, the only difference is that they are less resistant to pressure, but more flexible; 
• three-layer hoses (smooth inner PTFE layer, textile braid and/or steel spiral reinforcement, rubber outer layer) - all layers of this type of hose have been permanently connected to the inner Teflon covering, so the product most resembles a standard hose but is mainly used in the chemical industry.

What material versions of PTFE hoses are there?

Among the most popular material versions of PTFE hoses are:

• Teflon FEP, 
• PFA/MFA Teflon, 
• Tefzel (ETFE), 
• Halar (ECTFE).

Admittedly, the name itself reveals what material PTFE hoses are made of, but, contrary to appearances, there may also be some differences in this respect. This is due to the fact that Teflon copolymers are also used in the production of hoses.

This gives the hoses slightly different properties (for example, better mechanical strength or higher temperature resistance).

PTFE Hoses: Smooth and Corrugated, with Stainless Steel Braid

PTFE (Polytetrafluoroethylene) hoses are known for their exceptional chemical resistance, temperature tolerance, and low friction. They are commonly used in a wide range of applications where demanding conditions are present.

Two common types of PTFE hoses are:

Smooth PTFE Hoses: These hoses have a smooth, seamless inner liner, making them ideal for applications where low friction and smooth fluid flow are crucial. They are often used in high-purity applications and where contamination needs to be minimized.

Corrugated PTFE Hoses: These hoses have a flexible, corrugated inner liner, providing greater flexibility and movement compared to smooth hoses. This makes them well-suited for applications where the hose needs to bend or move frequently.

Stainless Steel Braid:

Both smooth and corrugated PTFE hoses can be reinforced with a stainless steel braid. This braid provides additional strength, pressure resistance, and burst protection. It also helps to prevent the hose from collapsing under pressure.

Antistatic Properties:

The antistatic feature is achieved through the incorporation of conductive materials within the PTFE or through the use of a specially designed synthetic braid. This helps to dissipate static charges, reducing the risk of sparks.

Key Features and Benefits:

Excellent Chemical Resistance: PTFE is highly resistant to a wide range of chemicals, acids, and solvents.

High Temperature Tolerance: PTFE hoses can withstand temperatures ranging from -65°C to +260°C (-85°F to +500°F).

Low Friction: The smooth surface of PTFE minimizes friction, allowing for efficient fluid flow.

Flexibility: Corrugated hoses offer increased flexibility for applications requiring movement.

Strength and Pressure Resistance: The stainless steel braid provides added strength and pressure resistance.

Applications:

PTFE hoses with stainless steel braid are commonly used in a variety of industries, including:

Chemical Processing: Handling corrosive chemicals and fluids.

Pharmaceutical Manufacturing: Used in sterile environments for drug production.

Food and Beverage Processing: Meeting strict hygiene standards.

Aerospace: Used in high-performance applications due to their lightweight and high-temperature resistance.

• Automotive: Used in fuel lines and other demanding applications.

Choosing the Right Hose:

The choice between a smooth or corrugated PTFE hose with stainless steel braid depends on the specific application requirements. Consider factors such as:

Fluid Type: The chemical compatibility of the fluid.

Temperature: The operating temperature range.

Pressure: The maximum operating pressure.

Flexibility: The need for movement or bending.

I hope this detailed description is helpful! What would you like to know more about? Do you have any specific applications in mind?

PTFE Flared Couplings

PTFE flared couplings are essential components designed to connect PTFE hoses securely and efficiently. They are particularly valued in applications requiring high chemical resistance and temperature tolerance. Here’s a detailed overview of PTFE flared couplings:

PTFE Flared Couplings: Overview

Design Features:

1. Flare Thru Fitting Design:

This design allows a smooth transition between the hose and the coupling, minimizing turbulence and ensuring efficient fluid flow.

Extremely Flexible:

PTFE flared couplings provide excellent flexibility, making them suitable for applications requiring movement or bending.

Ergonomically Easier to Handle:

The design of these couplings makes them easier to install and manage, reducing the risk of strain during assembly.

Higher Working Pressure Applications:

They are engineered to withstand high-pressure environments, making them ideal for demanding industrial applications.

Best Corrosion Resistance:

PTFE is known for its exceptional resistance to a wide range of chemicals, ensuring longevity and reliability in corrosive environments.

Applications:

Chemical Processing: Ideal for transferring aggressive chemicals safely.

Pharmaceutical Industry: Ensures hygienic transfer of fluids in sterile environments.

Food and Beverage Processing: Meets strict hygiene standards, suitable for food-grade applications.

Biotechnology: Used in processes requiring high purity and chemical resistance.

Key Benefits:

Chemical Inertness: PTFE is non-reactive, making it suitable for various applications.

Temperature Tolerance: Can handle a wide temperature range, typically from -65°C to +260°C (-85°F to +500°F).

Easy Maintenance: The smooth surface of PTFE reduces the risk of buildup and contamination.

Conclusion:

PTFE flared couplings are a vital part of PTFE hose assemblies, providing secure connections that enhance the performance and safety of fluid transfer systems. Their unique properties make them indispensable in industries where reliability and chemical resistance are paramount.

SPECIFIC of the PTFE Hoses

Let's break down the characteristics that define these hoses:

1. Material:

PTFE (Polytetrafluoroethylene): This is the core material of the hose. It's known for its exceptional chemical resistance, high-temperature tolerance (up to 260°C / 500°F), and low friction.

Stainless Steel Braid: This outer layer provides strength, protection against abrasion, and pressure resistance. It's often made from AISI 304 or 316 stainless steel.

2. Construction:

Smooth Wall: This type has a smooth inner surface, minimizing friction and maximizing flow rate. It's ideal for applications where clean fluid transfer is crucial.

Corrugated Wall: This type has a series of ridges or folds on the inner surface. This increases flexibility and allows the hose to bend more easily, making it suitable for tight spaces and applications with frequent movement.

3. Key Parameters:

ID (Inner Diameter): This determines the flow capacity of the hose. It's typically measured in millimeters (mm) or inches (in).

OD (Outer Diameter): This is the overall diameter of the hose, including the braid. It's also measured in mm or in.

Working Pressure: This is the maximum pressure the hose can withstand during operation. It's typically measured in bar or psi.

Temperature Range: This is the range of temperatures the hose can safely handle. It's usually specified in °C or °F.

Burst Pressure: This is the pressure at which the hose will fail. It's significantly higher than the working pressure.

Flexibility: This refers to the hose's ability to bend and flex without damage. Corrugated hoses generally have higher flexibility than smooth hoses.

4. Applications:

Smooth PTFE Hoses: Chemical processing, pharmaceutical manufacturing, food and beverage, high-purity fluid transfer.

Corrugated PTFE Hoses: Applications requiring flexibility, tight spaces, movement, and vibration resistance.

5. Additional Considerations:

Hose Length: Available in various lengths to suit your application.

End Fittings: These are used to connect the hose to other components. They come in various types, such as flared, barbed, or compression fittings.

The differences between the PTFE and industrial rubber hose

The choice between a PTFE hose with a metal braid and an industrial rubber hose often depends on the specific application and the conditions in which the hose will be used. Here are some key factors where PTFE hoses excel compared to rubber hoses:

1. Chemical Resistance

PTFE hoses are known for their outstanding chemical resistance, making them ideal for transporting aggressive chemicals, acids, and solvents.

Rubber hoses, on the other hand, can degrade or break down when exposed to certain chemicals.

2. Temperature Tolerance

PTFE hoses can handle extreme temperatures, typically up to 260°C (500°F), without losing their integrity.

Rubber hoses generally have a lower temperature threshold and may become soft or lose shape under high heat.

3. Non-Stick Surface

The non-stick properties of PTFE make it easier to clean and less likely to accumulate residues, which is crucial in applications requiring high purity.

Rubber hoses can retain residues and may require more frequent cleaning.

4. Durability and Longevity

PTFE hoses are more durable and resistant to wear and tear, which can lead to a longer service life.

Rubber hoses may wear out faster, especially in abrasive environments.

5. Flexibility and Bending Radius

While PTFE hoses are flexible, they can be less so than rubber hoses in certain configurations. However, the metal braid provides additional strength and pressure resistance.

Rubber hoses are often more flexible and easier to maneuver in tight spaces.

6. Pressure Ratings

PTFE hoses typically have higher pressure ratings, making them suitable for high-pressure applications.

Rubber hoses may not withstand the same levels of pressure, depending on their construction.

7. Applications

PTFE hoses are ideal for industries such as pharmaceuticals, food processing, and chemical manufacturing.

Rubber hoses are commonly used in general industrial applications, water transfer, and air supply.

What couplings we can crimp in the PTFE hoses

When it comes to crimping couplings with PTFE metal-braided hoses, several types are commonly used to ensure a secure and leak-proof connection. Here’s a list of some popular coupling types:

1. Aseptic Fittings

Triclover: Widely used in food and pharmaceutical industries for hygienic applications.

SMS: Common in dairy and food processing.

DIN 11851: Often used in the food and beverage sector.

RJT: Another option for food and beverage applications.

IDF: Used in various sanitary applications.

2. Standard Crimp Fittings

Crimp Hose Ends: These fittings ensure a reliable connection and are available in various materials and finishes.

Custom Hose Ends: Tailored to specific applications, providing flexibility in design.

3. Specialized Connectors

Hy-Lok Connectors: A wide range of end connectors and hose couplers designed for high-performance applications.

4. Other Industrial Couplings

Flanged Couplings: Used for high-pressure applications, providing a robust connection.

• Threaded Couplings: Allow for easy assembly and disassembly in various setups.

These couplings are designed to work seamlessly with PTFE hoses, ensuring that they can handle high pressures and aggressive chemicals while maintaining integrity and safety.