Are you looking for the best square o-ring factories in China? With numerous options available, choosing the right one can be overwhelming. In this article, we’ll compare the top Chinese manufacturers, highlighting their strengths, materials, and what sets them apart, to help you make an informed decision.

NBR Material Square Profile O-Rings

Product Details: Material: Buna-N Rubber. Cross Section Shape: Square. Hardness: Durometer 70A (Medium). For Use With: Grease, Hydraulic Oils. Temperature Range: -30° to 212° F. Color: Black.

Pros:
– Prevents rolling of the seal due to the square cross-section
– Suitable for use with grease and hydraulic oils
– Wide temperature range of -30° to 212° F
– Customized sizes available to cater to special requirements

Cons:
– Not recommended for exposure to strong chemicals, acids, or ketones
– Limited low temperature flexibility due to higher acrylonitrile content
– Not compatible with phosphate esters, brake fluids, strong acids, ozone, or weat…

Shop From The Leading PTFE Square Ring Manufacturer

Product Details: PTFE square rings are sealing devices with a square-shaped cross-section, providing more sealing surface area compared to traditional O-rings. They are made from Polytetrafluoroethylene (PTFE), a material known for its high heat resistance, chemical inertness, and non-toxicity. These rings are suitable for a wide range of applications, including chemical processing, pharmaceuticals, food and beverage equipment, aerospace, automotive sealing solutions, and hydraulic and pneumatic systems. They can operate continuously in temperatures from -100°F to 450°F (-78°C to 232°C) and are resistant to most fluids and gases[2][4][5].

Pros:
– High heat resistance and chemical inertness
– Non-toxic and suitable for food and pharmaceutical applications
– More sealing surface area compared to traditional O-rings
– Resistant to corrosion and abrasion
– Low friction coefficient and anti-adhesiveness
– Interchangeable with O-ring grooves without design changes

Cons:
– Rigid and better suited for static applications rather than dynamic ones
– May not be as flexible as other materials like NBR or Viton
– Can be more expensive than some other sealing materials

O-Rings, Rubber Seals – Best China Manufacturer & …

Product Details: Savvy manufactures a wide range of o-rings made from various materials including NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, Aflas, and more. These o-rings are available in standard and custom sizes, with the ability to produce encapsulated o-rings, backup-rings, x-rings, etc. The temperature range for these o-rings varies by material, such as -70°C to 220°C for Silicone. The hardness is typically measured in Shore A, with common hardness levels being 60 to 90. Savvy also offers o-rings in various colors, with the option for custom colors. The company has thousands of molds and can arrange for fast delivery via door-to-door

courier.

Pros:
– Good property and low cost, especially for NBR which accounts for about 50% of o…
– FKM (Viton) offers the best comprehensive performance and is widely used in high…
– Silicone o-rings are tasteless, non-toxic, and resistant to high temperatures an…
– Custom o-rings can be made at a very low mold/tooling cost with fast delivery.
– Wide range of materials available to suit different working conditions and appli…

Cons:
– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p…
– High hardness o-rings can be inconvenient to install.
– Unique or custom colors may increase the cost and require a larger MOQ with a lo…

FKM Viton Square Ring Seal

Product Details: FKM (Viton) square ring seals are made from fluorocarbon elastomers known for their excellent chemical and temperature resistance. They are available in various sizes, including standard AS568 imperial and metric sizes. These seals are used in both static and dynamic applications, offering high performance in chemical, aerospace, and industrial environments. They have a temperature range of -17°F to 437°F (-27°C to 225°C) and are resistant to oils, fuels, hydraulic fluids, and many organic solvents and chemicals[2][3][5].

Pros:
– Excellent chemical and temperature resistance
– Wide range of applications including chemical, aerospace, and industrial uses
– Low gas permeability and low compression set
– Good resistance to aging and ozone
– Specialty formulations available for improved low temperature and chemical resis…

Cons:
– Not recommended for use with steam, amines, or polar solvents
– Higher fluorine content reduces low-temperature flexibility
– May require specific gland designs and installation considerations

Rubber Flat Gasket Rubber Square O Ring

Product Details: Flat square rubber gaskets are made from various materials such as EPDM, Viton, NBR, NR, PTFE, PU, Silicone, and neoprene. They have a hardness range of 70-90A and are known for their excellent anti-chemical, high/low temperature, and oil resistance. These gaskets are used in mechanical sealing, pressure vessels, gas compressors, reaction vessels, heat exchangers, boilers, and filters. They can be customized according to customer requirements and are certified to ISO9001:2000 standards.

Pros:
– Excellent anti-chemical and oil resistance
– High and low temperature resistance
– Long service lifetime
– Can be used in a variety of applications including mechanical sealing and pressu…
– Customizable to meet specific requirements

Cons:
– May require specific groove configurations for optimal performance
– Limited to static applications where high sealing load force is required
– Material selection must be careful to match the application environment

Square O-Rings, Square Cut Section O-Ring Seals – Savvy

Product Details: Square O-Rings are rubber seals with a square-shaped cross-section or profile. They have a simple structure similar to common round o-rings but offer higher sealing performance. They can be cut from elastic tubing or molded, with dimensions specified by inner diameter (d1) and cross-section (W). Square o-rings can obtain a more uniform pressure distribution, allowing for a reduced cross-section W compared to round o-rings. They are available in various materials such as NBR, HNBR, Viton, Silicone, EPDM, and Teflon. They are used for bidirectional sealing and provide high reliability, good sealing, and long service life due to their high filling

degree in the groove and uniform pressure transmission.

Pros:
– Better sealing performance compared to round o-rings
– Slower aging due to small pre-compression after installation
– Good stability with minimal deformation under hydraulic pressure changes
– No ‘suck-back effect’ or ‘sweaty’ state issues
– Strong anti-extrusion performance
– Rated pressure of up to 50MPa, higher than round o-rings

Cons:
– Higher cost, especially for Viton Square O-Rings
– Material limitations; for example, Viton has higher cost and specific applicatio…

China Square Cut O Rings Manufacturer and Supplier, Factory

Product Details: Square cut O-rings are sealing devices with a square-shaped cross-section instead of the circular cross-section of standard O-rings. They are designed to fit in the same grooves as standard O-rings and are available in various materials such as Buna, Silicone, NBR, Viton, EPDM, and more. They are often used in static applications where high sealing load force is required and can be interchangeable with AS568A sized O-rings[2][3][4].

Pros:
– Provide more sealing surface area compared to standard O-rings, enhancing sealin…
– Can fit in existing O-ring grooves without the need for design changes.
– Offer better form fit in some spaces due to their square cross-section, increasi…
– Available in a wide range of materials to suit different application requirement…

Cons:
– Have largely been phased out by elastomeric sealing manufacturers in favor of Qu…
– Typically require tooling charges and/or large quantity orders to produce, makin…
– Not recommended for dynamic applications; instead, X-Rings or O-Rings are often…

China China Square O Ring Manufacturer, Factory

Product Details: Square O-rings are rubber seals with a square-shaped cross-section. They are specified by their inner diameter (d1) and cross-section (W). These seals can be cut from elastic tubing or molded. They are used for bidirectional sealing and provide a uniform pressure distribution, reducing the need for a larger cross-section compared to round O-rings. They are made from various materials such as Buna-N, Viton, EPDM, and HNBR, and have a temperature range of -30° to 212° F. They are suitable for use with grease and hydraulic oils[1][3][5].

Pros:
– Higher sealing effect due to uniform pressure distribution
– Reduced compression set ratio (8%~14%) compared to round O-rings (12~30%)
– No ‘suck-back effect’ or ‘extrusion damage’ issues
– Higher working pressure (50MPa) compared to round O-rings (32MPa)
– Better sealing in static applications due to flat edges covering more surface ar…
– High reliability, good sealing, and long service life

Cons:
– May require specific groove designs to optimize performance
– Could be more expensive than traditional round O-rings in some cases
– Limited availability in certain sizes and materials compared to round O-rings

square O RING rectangular gasket ring rectangular o ring

Product Details: Square O-rings, also known as rectangular O-rings or square-profile O-rings, are designed with a rectangular cross-section. This geometry allows for maximum contact surface area with minimal compression, making them ideal for static applications where high sealing load force is required. They are available in various standard and custom sizes, and can be made from a wide range of rubber compounds such as silicone (VMQ), butadiene nitrile (NBR), ethylene propylene (EPDM), neoprene (CR), styrene butadiene (SBR), and thermoplastic elastomer (TPE). These O-rings can be used in rectangular grooves and offer greater design flexibility compared to traditional round O-rings[1][2][3].

Pros:
– Maximum contact surface area with minimal compression
– Improved retention of internal and external diameters
– Greater design flexibility due to rectangular geometry
– No burrs, defects, voids, or roughness
– Wide range of seal materials available
– Custom cross-sectional dimensions possible
– Better seal in static applications such as hose, pipe, and faucet connections

Cons:
– May not be suitable for dynamic applications
– Requires precise groove dimensions for optimal performance
– Can be more expensive than traditional round O-rings in some cases

Square Profile O Rings

Product Details: Square-profile O-rings are characterized by their square cross-section. They are designed to offer a larger sealing surface compared to traditional round O-rings. These O-rings are typically used in static applications where a high sealing load force is required or when the sealing area is too thin for other types of seals. They are often made from various materials, including rubber and other elastomers, to suit different environmental and chemical resistance needs.

Pros:
– Increased sealing surface: The square cross-section of these O-rings offers a la…
– Better performance in static applications: Square-profile O-rings are particular…

Cons:
– Limited dynamic application suitability: Square-profile O-rings are generally no…
– Material limitations: While they can be made from various materials, the choice…

Comparison Table

Company	Product Details	Pros	Cons	Website
NBR Material Square Profile O-Rings	Material: Buna-N Rubber. Cross Section Shape: Square. Hardness: Durometer 70A (Medium). For Use With: Grease, Hydraulic Oils. Temperature Range: -30°…	– Prevents rolling of the seal due to the square cross-section – Suitable for use with grease and hydraulic oils – Wide temperature range of -30° to 2…	– Not recommended for exposure to strong chemicals, acids, or ketones – Limited low temperature flexibility due to higher acrylonitrile content – Not…	www.svks-rubberseal.com
Shop From The Leading PTFE Square Ring Manufacturer	PTFE square rings are sealing devices with a square-shaped cross-section, providing more sealing surface area compared to traditional O-rings. They ar…	– High heat resistance and chemical inertness – Non-toxic and suitable for food and pharmaceutical applications – More sealing surface area compared t…	– Rigid and better suited for static applications rather than dynamic ones – May not be as flexible as other materials like NBR or Viton – Can be more…	www.ningeplastics.com
O-Rings, Rubber Seals – Best China Manufacturer & …	Savvy manufactures a wide range of o-rings made from various materials including NBR, FKM (Viton), Silicone, EPDM, HNBR, CR, Aflas, and more. These o-…	– Good property and low cost, especially for NBR which accounts for about 50% of o… – FKM (Viton) offers the best comprehensive performance and is w…	– Low hardness o-rings are prone to peeling, installation damage, extrusion, and p… – High hardness o-rings can be inconvenient to install. – Unique…	savvyrubber.com
FKM Viton Square Ring Seal	FKM (Viton) square ring seals are made from fluorocarbon elastomers known for their excellent chemical and temperature resistance. They are available…	– Excellent chemical and temperature resistance – Wide range of applications including chemical, aerospace, and industrial uses – Low gas permeability…	– Not recommended for use with steam, amines, or polar solvents – Higher fluorine content reduces low-temperature flexibility – May require specific g…	www.svks-rubberseal.com
Rubber Flat Gasket Rubber Square O Ring	Flat square rubber gaskets are made from various materials such as EPDM, Viton, NBR, NR, PTFE, PU, Silicone, and neoprene. They have a hardness range…	– Excellent anti-chemical and oil resistance – High and low temperature resistance – Long service lifetime – Can be used in a variety of applications…	– May require specific groove configurations for optimal performance – Limited to static applications where high sealing load force is required – Mate…	www.rubberplasticparts.com
Square O-Rings, Square Cut Section O-Ring Seals – Savvy	Square O-Rings are rubber seals with a square-shaped cross-section or profile. They have a simple structure similar to common round o-rings but offer…	– Better sealing performance compared to round o-rings – Slower aging due to small pre-compression after installation – Good stability with minimal de…	– Higher cost, especially for Viton Square O-Rings – Material limitations; for example, Viton has higher cost and specific applicatio…	savvyrubber.com
China Square Cut O Rings Manufacturer and Supplier, Factory	Square cut O-rings are sealing devices with a square-shaped cross-section instead of the circular cross-section of standard O-rings. They are designed…	– Provide more sealing surface area compared to standard O-rings, enhancing sealin… – Can fit in existing O-ring grooves without the need for design…	– Have largely been phased out by elastomeric sealing manufacturers in favor of Qu… – Typically require tooling charges and/or large quantity orders…	www.ymsealing.com
China China Square O Ring Manufacturer, Factory	Square O-rings are rubber seals with a square-shaped cross-section. They are specified by their inner diameter (d1) and cross-section (W). These seals…	– Higher sealing effect due to uniform pressure distribution – Reduced compression set ratio (8%~14%) compared to round O-rings (12~30%) – No ‘suck-ba…	– May require specific groove designs to optimize performance – Could be more expensive than traditional round O-rings in some cases – Limited availab…	m.king-rubber.com
square O RING rectangular gasket ring rectangular o ring	Square O-rings, also known as rectangular O-rings or square-profile O-rings, are designed with a rectangular cross-section. This geometry allows for m…	– Maximum contact surface area with minimal compression – Improved retention of internal and external diameters – Greater design flexibility due to re…	– May not be suitable for dynamic applications – Requires precise groove dimensions for optimal performance – Can be more expensive than traditional r…	www.acrubberfactory.com
Square Profile O Rings	Square-profile O-rings are characterized by their square cross-section. They are designed to offer a larger sealing surface compared to traditional ro…	– Increased sealing surface: The square cross-section of these O-rings offers a la… – Better performance in static applications: Square-profile O-ri…	– Limited dynamic application suitability: Square-profile O-rings are generally no… – Material limitations: While they can be made from various mate…	www.chaoyuerubber.com

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Square O-Ring Factories in China

What materials are commonly used to manufacture square o-rings in China?

Square o-rings in China are often made from a variety of materials, including Nitrile (NBR), Ethylene Propylene Diene Monomer (EPDM), Fluoroelastomer (FKM or Viton), Silicone (VMQ), and Hydrogenated Nitrile Butadiene Rubber (HNBR). Each material has its own unique properties and is suited for different applications, such as resistance to chemicals, high temperatures, or specific industrial uses.

How do I choose the right hardness for my square o-rings?

The hardness of a square o-ring is crucial and is measured in Shore A units. Generally, a hardness of 70 Shore A is common, but it can range from 30 to 90. If you need easy installation, a lower hardness (60-70) is better, but it may be prone to damage. For high-pressure applications, a higher hardness (85-90) is recommended. It’s important to balance ease of installation with the durability needed for your application.

Can I customize the size and color of my square o-rings?

Yes, you can customize both the size and color of your square o-rings. Chinese manufacturers often have thousands of molds available and can produce o-rings according to your specific dimensions and color requirements. For colors, you can provide a standard RAL or Pantone color number, though common colors like black, green, brown, and red are more readily available and cost-effective.

What are the advantages of using square o-rings over traditional o-rings?

Square o-rings offer several advantages, including superior sealing performance and cost-effectiveness. They fit into the same grooves as traditional o-rings but provide a more consistent seal due to their square cross-section. This design also eliminates the need for design changes in existing applications, making them an economical option for static sealing applications.

How do I ensure the quality and reliability of the square o-rings I purchase from Chinese manufacturers?

To ensure quality and reliability, look for manufacturers that are ISO certified (e.g., ISO 9001, ISO 13485) and have a good reputation. Many reputable manufacturers in China offer free samples for testing and have strict quality control measures in place. Additionally, checking for customer reviews and asking about their production processes and material quality can help you make an informed decision.