PVDF Threaded Flanges

Exceptional purity and chemical resistance with moderate strength

• High Purity and low extractables
• Chemically resistant to most common solvents including acids, salts, oils and steam
• Mechanical strength and toughness to 150°C (300°F)
• Resistance to ultraviolet, nuclear radiation, and standard sterilization methods
• Resistance to weathering and fungi
• PVDF material datasheet
• Threaded flange features and benefits

PVDF threaded flanges / Kynar® threaded flanges are made from a tough engineered fluoro-thermoplastic that offers a unique balance of excellent chemical resistance and good strength properties.

PVDF threaded flanges have the characteristic stability of fluoropolymers when exposed to harsh chemical and ultraviolet environments but are much stronger mechanically than PTFE or PFA polymers.  PVDF threaded flanges also excel in high purity and low-permeability applications such as pharmaceutical and semi-conductor processing.

Resources: Flange Dimensions, Flange Bolting Chart

Flange Types Available: Blind Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges

PVDF Mechanical  & Physical Properties

PVDF Chemcial Resistance Compared to Other Polymers

PVDF Threaded Flange Features & Benefits

PVDF threaded flanges have a tapered female thread to join the male threads of a pipe in order to create a tight seal. This type of flange is most ideal when post weld heat treatment is not possible in hazardous, flammable or explosive applications where welding is too dangerous. PVDF threaded flanges are also convenient in pilot processes whose configuration is often changed.

Threaded Flange Advangtages

• The main benefit is that that threaded seal eliminates the need for welding.
• As they do not require welding they save time and money to install.
• Allow for connections to be made in dangerous, explosive applications where welding is not possible.
• Useful connection in materials that are difficult to create a successful and strong weld.
• Ideal for connecting small diameter pipes.
• Systems could be easily reconfigured.

Threaded Flange Disadvantages

• They are not suitable where high temperatures, frequent cyclic conditions or bending stresses are likely in applications.

PVDF Hex Head Bolts

Exceptional purity and chemical resistance with moderate strength

• High Purity and low extractables
• Chemically resistant to most common solvents including acids, salts, oils and steam
• Mechanical strength and toughness to 150°C (300°F)
• Resistance to ultraviolet, nuclear radiation, and standard sterilization methods
• Resistance to weathering and fungi
• Material datasheet for PVDF
• PVDF hex head bolt features and benefits

PVDF / Kynar® hex head bolts are made from a tough engineered fluoro-thermoplastic that offers a unique balance of excellent chemical resistance and good strength properties.

PVDF hex head bolts have the characteristic stability of fluoropolymers when exposed to harsh chemical and ultraviolet environments but are much stronger mechanically than PTFE or PFA polymers.  PVDF / Kynar bolts also excel in high purity and low-permeability applications such as pharmaceutical and semi-conductor processing.

PVDF bolts / Kynar bolts are available in most metric and standard sizes. See our online store (top right) for common sizes or contact us for your specific requirements.

Bolt Types Available: Hex Bolts

PVDF Hex Head Bolt Features and Benefits

It is important to differentiate between a PVDF hex head bolt and hex head cap screw. Often people assume they are the same, but they are actually very different fasteners in terms of how they are manufactured, as well as from an application perspective. Regardless of your choice, PVDF hex heads offer strong, stable joints because of their large head service. 

The Hex Comparison

PVDF Mechanical  & Physical Properties

PVDF Chemcial Resistance Compared to Other Polymers

PVDF Set Screws / Kynar Set Screws

Exceptional purity and chemical resistance with moderate strength

• High Purity and low extractables
• Chemically resistant to most common solvents including acids, salts, oils and steam
• Mechanical strength and toughness to 150°C (300°F)
• Resistance to ultraviolet, nuclear radiation, and standard sterilization methods
• Resistance to weathering and fungi
• Material datasheet for PVDF
• PVDF set screw features and benefits

PVDF set screws / Kynar® set screws are made from a tough engineered fluoro-thermoplastic that offers a unique balance of excellent chemical resistance and good strength properties.

PVDF set screws have the characteristic stability of fluoropolymers when exposed to harsh chemical and ultraviolet environments but are much stronger mechanically than PTFE or PFA polymers.  PVDF screws also excel in high purity and low-permeability applications such as pharmaceutical and semi-conductor processing.

PVDF set screws are available in most metric and standard sizes. See our online store (top right) for common sizes or contact us for your specific requirements.

Screw Types: Flat Head Screws, Hex Cap Screws, Pan Head Screws, Set Screws, Socket Head Cap Screws

PVDF Set Screw Features & Benefits

PVDF set screws are unique in that they have no screw head, meaning that they have no protruding part past the threaded shaft. They are thread only and are available with a socket or slotted driver insert at one end. Set screws are used to secure an object within or against another object. Typically they secure a rotating part such as a gear or shaft. PVDF set screws are driven through a threaded hole in the rotating part until it is tight against the inner object, preventing from moving relative to the outer object. Set screws are available with various points depending on the application.

Cup Point 
This is the most commonly used set screw and is identified by a cup-shaped indentation on one end. PVDF cup points are typically used for a quick, semi-permanent or permanent applications where it is acceptable to cut the cup point edge of the screw.

Cone Point
A cone point is easily identifiable by its sharp cone-shaped point – just like an ice cream cone. PVDF cone point set screws deliver the strongest clamping force due to the deep penetration of the point. As a result they are used for permanent assembly.

Flat Point
The cheapest and simplest of the set screw point styles, this screw has a flat surface on the bottom of the screw. This type is used when you need the ability to frequently change parts and require minimal shaft deformation.

PVDF Mechanical  & Physical Properties

PVDF Chemcial Resistance Compared to Other Polymers

PVDF Screws / Kynar Screws

Exceptional purity and chemical resistance with moderate strength

• High Purity and low extractables
• Chemically resistant to most common solvents including acids, salts, oils and steam
• Mechanical strength and toughness to 150°C (300°F)
• Resistance to ultraviolet, nuclear radiation, and standard sterilization methods
• Resistance to weathering and fungi
• PVDF material datasheet

PVDF screws / Kynar® screws are made from a tough engineered fluoro-thermoplastic that offers a unique balance of excellent chemical resistance and good strength properties.

PVDF screws / Kynar screws have the characteristic stability of fluoropolymers when exposed to harsh chemical and ultraviolet environments but are much stronger mechanically than PTFE or PFA polymers.  PVDF screws / Kynar screws also excel in high purity and low-permeability applications such as pharmaceutical and semi-conductor processing.

PVDF screws / Kynar screws are available in most metric and standard sizes. See our online store (top right) for common sizes or contact us for your specific requirements.

Screw Types: Flat Head Screws, Hex Cap Screws, Pan Head Screws, Set Screws, Socket Head Cap Screws

PVDF Mechanical  & Physical Properties

PVDF Chemcial Resistance Compared to Other Polymers