PTFE & PFA Lined Pipes and Valves

Product Overview

Yozonetech PTFE & PFA Lined Pipes and Valves are engineered for the safe handling of corrosive, aggressive and high-purity chemical media in demanding industrial fluid systems.

The product range combines a mechanically strong metal or engineered substrate with a chemically resistant PTFE or PFA lining, creating a dual-material construction that provides both structural strength and excellent chemical resistance.

PTFE-lined and PFA-lined piping systems are widely used for transferring acids, alkalis, solvents, corrosive chemicals and other aggressive process media. Depending on the application, lined components can include straight pipes, elbows, tees, reducers, crosses, expansion joints, sight glasses, valves and customized pipe fittings.

PFA lining is particularly suitable for applications requiring high chemical purity, excellent corrosion resistance and good resistance to elevated temperatures. PTFE lining provides excellent chemical resistance and is widely used in general corrosive chemical transfer systems.

Yozonetech supports customized dimensions, lining thicknesses, connection configurations, pressure requirements and valve constructions according to the customer’s process conditions.

Product Range

PTFE Lined Pipes

PTFE-lined pipes consist of a rigid outer substrate and an internal PTFE lining that isolates the transported medium from the structural material.

Typical configurations include:

• Straight lined pipes
• PTFE lined elbows
• PTFE lined tees
• PTFE lined reducers
• PTFE lined crosses
• PTFE lined pipe fittings
• PTFE lined expansion joints
• Customized lined piping components

PTFE lining provides a highly corrosion-resistant internal surface while the external substrate provides the mechanical strength required for installation and operation.

PFA Lined Pipes

PFA-lined pipes are designed for applications where chemical resistance, temperature performance and contamination control are especially important.

PFA provides excellent resistance to many aggressive chemicals and offers a smooth, non-reactive internal surface.

PFA-lined piping is particularly attractive for:

• Semiconductor manufacturing
• High-purity chemical transfer
• Chemical processing
• Pharmaceutical production
• Specialty chemical systems
• High-purity fluid handling

The appropriate PFA grade and lining construction can be selected according to the chemical medium and process requirements.

PTFE Lined Valves

PTFE-lined valves provide corrosion-resistant wetted surfaces while maintaining the mechanical strength of the valve body.

Available valve configurations may include:

• PTFE lined ball valves
• PTFE lined butterfly valves
• PTFE lined plug valves
• PTFE lined diaphragm valves
• PTFE lined check valves
• Customized lined valves

The lining isolates the process fluid from the valve body and other components that are not intended to directly contact the corrosive medium.

PFA Lined Valves

PFA-lined valves are suitable for demanding chemical and high-purity applications where excellent chemical resistance and low contamination are required.

They can be used in systems handling aggressive chemicals, high-purity process fluids and specialty chemical media.

The final valve configuration, lining material and sealing system should be selected according to the actual chemical, pressure and temperature conditions.

Wesentliche Merkmale

Excellent Corrosion Resistance

PTFE and PFA provide outstanding resistance to many acids, alkalis, solvents and aggressive chemical media.

Chemically Inert Wetted Surface

The lining creates a chemically resistant barrier between the process medium and the structural substrate.

Wide Chemical Compatibility

PTFE and PFA are compatible with a broad range of industrial chemicals, although actual compatibility should always be confirmed against the specific chemical, concentration, temperature and operating conditions.

Smooth Internal Surface

The smooth fluoropolymer lining helps reduce deposits and provides a clean internal flow path.

High-Temperature Capability

PTFE and PFA can withstand elevated operating temperatures compared with many conventional polymer lining materials. Actual temperature limits depend on lining thickness, pressure, construction and application.

Reduced Corrosion of Equipment

The fluoropolymer lining protects the underlying metal substrate from direct exposure to aggressive process media.

Long Service Life

Properly selected lined piping and valves can provide long-term service in demanding chemical environments while reducing the need for frequent replacement.

Customized Construction

Lining material, thickness, pipe dimensions, valve type, connection and external substrate can be customized according to application requirements.

PTFE vs. PFA Lining

Although PTFE and PFA have similar fluoropolymer characteristics, they are not interchangeable in every application.

Eigentum	PTFE Lining	PFA Lining
Chemische Beständigkeit	Ausgezeichnet	Ausgezeichnet
Korrosionsbeständigkeit	Ausgezeichnet	Ausgezeichnet
Temperaturbeständigkeit	Ausgezeichnet	Ausgezeichnet
Surface Smoothness	Ausgezeichnet	Ausgezeichnet
High-Purity Applications	Good–Excellent	Ausgezeichnet
Verarbeitbarkeit	Ausgezeichnet	Ausgezeichnet
Flexibilität	Höher	Unter
Complex Lining Shapes	Gut	Ausgezeichnet
Semiconductor Applications	Selected applications	Ausgezeichnet
General Chemical Processing	Ausgezeichnet	Ausgezeichnet

When to Choose PTFE

PTFE lining is an excellent choice for general chemical processing and corrosive fluid transfer where broad chemical resistance is the primary requirement.

It is commonly used for:

• Acid transfer
• Alkali transfer
• Solvent handling
• Chemical processing
• Corrosive wastewater
• Industrial chemical pipelines

When to Choose PFA

PFA is particularly attractive where the application requires a combination of:

• High chemical purity
• Ausgezeichnete chemische Beständigkeit
• Smooth internal surfaces
• Complex component geometry
• High-purity chemical handling
• Semiconductor process applications

The final material selection should always be based on the actual chemical and process conditions.

Materials & Construction

A lined pipe or valve generally consists of two functional layers.

Outer Structural Layer

The outer body provides the mechanical strength required to withstand installation loads, pressure and external environmental conditions.

Depending on the application, the substrate may be manufactured from materials such as:

• Carbon steel
• Stainless steel
• Ductile iron
• Other specified metals

Fluoropolymer Lining

The internal wetted surface is lined with PTFE or PFA.

This layer acts as the primary corrosion-resistant barrier between the process medium and the structural substrate.

The lining thickness and construction can be selected according to:

• Chemical concentration
• Operating temperature
• Working pressure
• Vacuum conditions
• Required service life
• Pipe diameter
• Application standard

For critical chemical systems, the integrity of the lining and the connection between the lining and pipe or valve assembly are important quality considerations.

Anwendungen

Chemische Verarbeitung

PTFE and PFA lined piping and valves are widely used for aggressive chemical transfer systems, including:

• Acid transfer
• Alkali transfer
• Solvent transfer
• Corrosive chemical processing
• Chemical storage systems
• Chemical dosing systems

Semiconductor Industry

PFA-lined components are particularly suitable for selected high-purity chemical systems in semiconductor manufacturing.

Applications can include:

• High-purity chemical transfer
• Wet-process equipment
• Chemical distribution systems
• Etching chemical delivery
• Process chemical handling

For semiconductor applications, the complete system should be evaluated not only for chemical resistance but also for cleanliness, extractables, particle generation and contamination control.

Pharmaceutical & Biotechnology

Fluoropolymer-lined components can be used for selected aggressive or chemically sensitive process fluids where corrosion resistance and cleanability are important.

Electroplating

Suitable applications include:

• Plating chemical transfer
• Acid circulation
• Chemical dosing
• Corrosive liquid transfer

Environmental & Wastewater Treatment

PTFE-lined piping and valves can be used for selected corrosive wastewater and chemical treatment systems.

Industrielle Ausrüstung

Other potential applications include:

• Pumps
• Chemical storage tanks
• Heat-treatment equipment
• Scrubber systems
• Chemical reactors
• Process skids
• Fluid distribution systems

PTFE & PFA Lined Valves

Valves are critical components of a lined chemical piping system because they must provide both reliable flow control and chemical isolation.

A lined valve uses fluoropolymer material on the internal wetted surfaces while the external valve body provides mechanical strength.

Depending on the process requirements, customers can select different valve designs.

Ball Valves

PTFE or PFA lined ball valves provide reliable on/off flow control and are suitable for many corrosive chemical systems.

Butterfly Valves

Butterfly valves offer a compact design and can be suitable for larger-diameter chemical pipelines.

Plug Valves

Lined plug valves can provide reliable shutoff for selected corrosive chemical applications.

Diaphragm Valves

Diaphragm valves are useful where isolation of the process medium from the valve mechanism is required.

Check Valves

Lined check valves can be used to prevent reverse flow in corrosive chemical systems.

The valve type should be selected according to flow rate, pressure, temperature, chemical compatibility, required shutoff performance and pipe size.

How to Select a PTFE or PFA Lined Pipe

Before purchasing, provide the following information:

1. Chemical Medium

Specify the actual chemical.

For example:

• Hydrochloric acid
• Sulfuric acid
• Nitric acid
• Hydrofluoric acid
• Sodium hydroxide
• Organic solvents
• Specialty chemicals

Chemical concentration should also be provided.

2. Operating Temperature

Temperature significantly influences polymer performance and chemical compatibility.

Specify:

• Normal operating temperature
• Maximum operating temperature
• Minimum operating temperature
• Temperature fluctuations

3. Pressure

Specify:

• Working pressure
• Maximum pressure
• Pressure fluctuations
• Vacuum conditions if applicable

Vacuum service is particularly important because not every lined construction is suitable for full or partial vacuum conditions at elevated temperatures.

4. Pipe Size

Provide:

• Nominal pipe size
• Inner diameter
• Outer diameter
• Connection standard

5. Connection Type

Possible options include:

• Flanged connection
• Threaded connection
• Customized connection
• OEM connection

6. Lining Material

Select:

• PTFE
• PFA
• Application-specific fluoropolymer grade

How to Judge Lined Pipe & Valve Quality

A high-quality lined component should not be judged only by its external appearance.

Important inspection points include:

Lining Thickness

The lining should maintain a consistent thickness throughout the specified area.

Surface Quality

The internal surface should be smooth and free from obvious defects, cracks, bubbles, contamination or abnormal deformation.

Lining Integrity

The lining should remain securely integrated with the component and should not show signs of separation or damage.

Dimensional Accuracy

Check:

• Pipe length
• Flange dimensions
• Bore diameter
• Wandstärke
• Valve dimensions
• Connection dimensions

Electrical / Spark Testing

For appropriate lined components, electrical spark or holiday testing can be used to identify defects or discontinuities in the fluoropolymer lining.

The test voltage and method should be appropriate for the lining construction.

Pressure Testing

Pressure testing should be performed according to the applicable product standard and customer requirements.

Vacuum Testing

Where the system operates under vacuum, the lined construction should be specifically evaluated for vacuum resistance.

Chemical Compatibility

The lining material should be checked against the actual chemical, concentration and temperature rather than relying on a general “chemical resistant” statement.

Manufacturing & Quality Control

Yozonetech applies controlled manufacturing processes to maintain the dimensional and functional quality of PTFE and PFA lined components.

Depending on the product construction, manufacturing may include:

Substrate Preparation → Surface Treatment → Fluoropolymer Lining → Forming / Processing → Dimensional Inspection → Lining Inspection → Pressure Testing → Final Inspection

Quality control may include:

• Raw material inspection
• Dimensional inspection
• Lining thickness inspection
• Surface inspection
• Spark / holiday testing where applicable
• Pressure testing
• Vacuum testing where applicable
• Flange inspection
• Valve function testing
• Leakage inspection
• Final appearance inspection

For OEM projects, inspection and documentation requirements can be established before production.

Customization / OEM & ODM

Yozonetech supports customized PTFE and PFA lined pipes, fittings and valves according to customer drawings, samples and technical specifications.

Customization can include:

Pipe

• Durchmesser
• Länge
• Lining thickness
• PTFE or PFA material
• Flange type
• Connection configuration
• Special geometry

Fittings

• Elbows
• Tees
• Reducers
• Crosses
• Customized fittings

Valves

• Valve type
• Größe
• Pressure rating
• Lining material
• Connection type
• Actuation configuration
• Fitting configuration

Customers can provide the chemical medium, concentration, temperature, pressure, flow rate and pipe drawings for technical evaluation.

Why Choose Yozonetech?

Yozonetech provides fluoropolymer products and customized solutions for demanding chemical and industrial applications.

Our PTFE and PFA lined piping solutions combine the mechanical strength of the structural substrate with the chemical resistance of fluoropolymer lining, providing an effective solution for corrosive fluid handling.

We support:

• PTFE lining
• PFA lining
• Lined pipes
• Lined fittings
• Lined valves
• Customized dimensions
• OEM / ODM manufacturing
• Application-specific material selection
• Technical documentation
• Quality inspection

For customers dealing with aggressive chemicals, selecting the correct lining material is only the first step. Pipe construction, valve design, pressure, temperature, vacuum conditions, connection design and testing requirements should all be evaluated together.

FAQ

1. What is a PTFE lined pipe?

A PTFE lined pipe consists of a structural outer pipe with a PTFE layer on the internal wetted surface. The PTFE lining provides chemical and corrosion resistance while the outer substrate provides mechanical strength.

2. What is the difference between PTFE and PFA lined pipes?

Both provide excellent chemical resistance. PTFE is widely used for general corrosive chemical handling, while PFA is particularly attractive for high-purity applications and complex geometries. The appropriate choice depends on the chemical and process conditions.

3. What chemicals can PTFE lined pipes handle?

PTFE has excellent resistance to a broad range of acids, alkalis, solvents and aggressive chemicals. However, compatibility should always be checked against the actual chemical, concentration, temperature and operating conditions.

4. Can you supply PTFE lined valves?

Yes. We can supply different types of PTFE lined valves, including ball valves, butterfly valves, plug valves, diaphragm valves and check valves according to application requirements.

5. Are PFA lined valves suitable for semiconductor applications?

PFA can be suitable for selected high-purity semiconductor chemical handling applications because of its chemical resistance and suitability for high-purity fluid systems. The complete valve and system should be evaluated for cleanliness and contamination requirements.

6. Can PTFE lined pipes operate under vacuum?

Some lined pipe constructions can be designed for vacuum service, but vacuum resistance depends on the substrate, lining construction, temperature, diameter and pressure conditions. Vacuum service should therefore be specified before production.

7. Can the pipe and valve dimensions be customized?

Yes. We support OEM and ODM production based on drawings, samples and technical specifications, including pipe dimensions, lining thickness, flange configuration, valve type and connection requirements.

8. What information should I provide for a quotation?

For an accurate quotation, please provide the chemical medium, concentration, operating temperature, working pressure, vacuum requirements if any, pipe size, connection type, required lining material and quantity. Drawings or photos of the existing component are also helpful for customized projects.