Ever wondered where the best O-rings in the world come from? Many top-quality O-rings are manufactured in China, but choosing the right factory can be tricky. Comparing the top O-ring factories is crucial for securing reliable quality, competitive pricing, and timely delivery for your projects. Knowing the best options saves you time, money, and potential headaches down the line. Ready to find your perfect O-ring supplier? Let’s dive into our comparison of China’s leading O-ring manufacturers!

Custom O-ring Manufacturer and Wholesale Supplier – Hongju

Product Details: Custom and standard size silicone rubber O-rings and high-temperature O-ring seals. Available in various colors and materials. Manufactured using compression molding.

Technical Parameters:
– Hardness tolerance: ±3-5A (customizable)
– Dimensions and tolerances follow ISO3601 standards (customizable)

Application Scenarios:
– Engines
– Pumps
– Cylinders
– Connectors
– Valves
– Various machinery (static and dynamic applications)

Pros:
– High quality
– Certified materials
– Fast turnaround time
– Competitive wholesale prices
– Customizable designs and materials
– Free samples available
– Wide selection of stock items

Cons:
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Top 10 O-ring Manufacturers and Suppliers in China (2024)

Product Details: O-rings (standard and metric sizes), silicone rubber parts, gaskets, seals, keypads, grommets, neoprene gaskets, medical silicone products, plastic o-rings, gaskets, seals, extrusion parts, suction cups, grommets, hoses, hydraulic and pneumatic seals, encapsulated o-rings, auto power steering PTFE seals, hydraulic cylinder seals, rotary o-ring seal, stainless steel PTFE oil seal, cord oil seal, oil seals, hydraulic seals, rubber seals, liquid silicone rubber parts, pneumatic seals, silicone accessories, o-ring seal, rubber gaskets, oil seal covers, pump valve oil seals, hydraulic seals, o-ring seal, o-ring kit, bearing seal/strip, oil and wiper seal, sealing strips, rubber cords, EPDM rubber seals, square rings, rotary, scraper,

and piston seals, bonded seals, gaskets, oil seals

Technical Parameters:
– Size (standard and metric)
– Material (nitrile rubber, silicone, EPDM, Viton/fluorocarbon, etc.)
– Pressure resistance
– Temperature resistance
– Chemical resistance

Application Scenarios:
– Automotive industry
– Aerospace industry
– Construction industry
– High-tech equipment
– Medical equipment
– Chemical industry
– Valves
– Pipelines
– Hardware
– Military

Pros:
– Wide range of products
– Fast delivery
– Good customer service
– Low minimum order quantities (MOQs)
– Customization available
– Competitive pricing
– High-quality materials
– Well-equipped production facilities
– Export license
– International clients

Cons:
– Insufficient information to list specific cons

Custom Rubber Seals & O-rings Manufacturer | Haisun Rubber

Product Details: Custom rubber seals and high-precision O-rings. Specific types include NBR, HNBR, VMQ, FKM, EPDM, ACM, and CR O-rings, as well as oil seals, rubber x-rings, rubber gaskets, rubber grommets, custom rubber parts, and O-ring kits.

Technical Parameters:
– O-ring tolerance up to ±0.01 mm
– Rubber seals tolerance up to 0.02 mm

Application Scenarios:
– Smartphones
– Watches
– Automotive parts
– Security systems
– Aerospace
– Communication equipment
– Medical devices
– Food machinery
– Electronic accessories

Pros:
– IATF16949 certified factory
– ISO Class-100,000 clean rooms for assembly and relubrication

Cons:
– Generic placeholder
– Generic placeholder

O-Rings, Rubber Seals – Best China Manufacturer & Supplier – Savvy

Product Details: O-rings are circular cross-section rubber sealing rings used to seal various fluids (air, water, oil). Savvy Rubber manufactures standard and custom o-rings in various materials, including NBR, FKM, Silicone, EPDM, HNBR, CR, Aflas, PTFE, Nylon, and PU. They offer encapsulated o-rings, backup rings, and x-rings. Sizes are specified by ID, OD, and CS, following various international standards (AS568, BS1516, DIN 3771, JIS B 2401, ISO 3601, GB 3452.1). Hardness is measured in Shore A (40-90). Colors are customizable, but standard colors are recommended for cost-effectiveness.

Technical Parameters:
– ID (Inside Diameter), OD (Outside Diameter), CS (Cross-section/Width), Shore A H…
– Temperature Range varies by material (e.g., NBR: -40°C to 120°C, FKM: -20°C to 2…

Application Scenarios:
– Hydraulic and pneumatic transmission systems
– Static and dynamic sealing in various equipment and industries (medical, food, a…

Pros:
– Simple structure, small size, compact installation
– Self-sealing effect, low cost, wide application

Cons:
– Large starting friction resistance in compression sealing
– Prone to damage (cutting, twisting, breaking) if improperly used

Top 10 O-Rings Manufacturers in China – News – qlrubber.com

Product Details: O-rings, quad-rings, V-rings, rubber balls, grommets, washers, gaskets, bumpers, bushings, plugs, bellows, extrusions, rubber hoses, O-ring cord, rubber seals, rubber dampers, molded rubber parts, rubber extrusions. Custom made products are a large percentage of their business. Materials include FKM, NBR, Silicone, EPDM, NR, PU, CR, HNBR, SBR, IIR, SEP, Fluorosilicone, Aflas, FFKM, and other special materials such as NR & SBR mixture, NBR & PVC mixture.

Technical Parameters:
– Various sizes
– Diverse choice of material and processing technology

Application Scenarios:
– Aerospace
– Automotive
– Medical
– Construction
– Various industries

Pros:
– Custom production capabilities
– Wide range of materials available

Cons:
– None explicitly stated in the provided text

China O Rings Suppliers, Manufacturers, Factory – Customized O Rings …

Product Details: Jinbond offers a range of static seals including O-rings, Heavy Duty Static Seal JB-17 (alternative to O-rings and anti-extrusion rings for high-pressure applications), Spring Energized Axial Seals (Teflon jacket, cantilever or helical spring), High Pressure Spring Seals for Flange (Teflon jacket, V-shaped or helical spring), Hydraulic Teflon Back-up Rings (prevent O-ring extrusion), Hydraulic Static Seals (U-shaped slide ring, coiled metallic spring), Nitrile Rubber O-rings, and Rubber X-ring Quad Rings.

Technical Parameters:
– High pressure capabilities (JB-17)
– Material specifications (NBR, Teflon)

Application Scenarios:
– High-pressure applications
– Flange sealing
– Dynamic and static sealing
– Cryogenic service

Pros:
– High efficiency (JB-17)
– Prevent O-ring extrusion

Cons:
– Insufficient information to determine cons
– Insufficient information to determine cons

China O Ring Manufacturers Factory – Customized O Ring Made in China

Product Details: O-rings, customized and bulk, made in China. Various sizes and materials available for different applications. Specific O-ring examples include fuel injector O-rings, fuel pump O-rings, oil pickup tube gaskets, throttle body seals, and engine part O-rings.

Technical Parameters:
– Specific dimensions and materials vary depending on the custom order.
– High quality and competitive price.

Application Scenarios:
– Automotive engine parts (fuel injectors, fuel pumps, oil pickup tubes, throttle…
– Various industrial applications (not specified)

Pros:
– High quality
– Competitive price
– Customized options available
– Bulk wholesale options

Cons:
– Specific cons are not listed on the website.
– No information on material specifications or tolerances.

O’rings – Sealing Australia

Product Details: O-rings are torus-shaped rings used to prevent leakage of fluids and gases by filling clearance gaps between mating hard surfaces. They are typically manufactured from various rubber compounds (nitrile, Viton®, neoprene, silicone, polyurethane, Teflon) and are available in different grades for hardness, color, temperature range, and chemical resistance.

Technical Parameters:
– Hardness (Shore A Durometer, IRHD)
– Size (Imperial: BS1806, AS568A; Metric: JIS-B2401)
– Groove design
– Chemical compatibility
– Temperature resistance
– Pressure resistance
– Abrasion resistance
– Compression set
– Tear resistance
– Tensile strength
– Permeability resistance

Application Scenarios:
– Preventing leakage of fluids and gases in various applications
– Automotive
– Hydraulic systems
– Aerospace
– Food and beverage
– Pharmaceuticals
– Semiconductors

Pros:
– Simple and economical design
– Widely used and readily available
– Effective in preventing leakage

Cons:
– Susceptible to failure due to incompatibility with operating environment
– Prone to extrusion failure under high pressure
– Requires careful consideration of material selection, sizing, and groove design

Marco Rubber & Plastics – Sealing Products & Solutions

Product Details: O-rings, basic seals, performance seals (spring-energized seals, glide rings, backup rings), custom molded seals, gaskets, and other custom components. Offers 3,000+ materials including Kalrez, Viton, and Parker.

Technical Parameters:
– size
– material
– durometer
– performance requirements

Application Scenarios:
– Semiconductor
– Solar
– LCD
– Food
– Water
– Life Sciences
– Aerospace
– Military
– Oil & Gas Refining & Exploration
– Chemical Handling & Processing
– Electronics – EMI Shielding

Pros:
– Large inventory of specialty and standard sealing solutions
– Fast response and same-day shipping for in-stock products
– Expert engineering support and custom solutions
– ISO 9001:2015 certified

Cons:
– Cheap seals can be costly in the long run (implied)
– Generic placeholder

O Ring, O-Rings India, Rubber O Rings, Oil Seals, ISG Rubber Industries

Product Details: O-Rings, Rubber O-Rings, Oil Seals, Extruded O-Ring Cords, Extruded Profiles, O-Ring Kits, Splicing Kits (Standard, Metric, Four Lobed Profile, Square Profile), X-Rings, Back Up Rings, Rubber Washers, Rubber Seats for Butterfly Valves, Piston Seals, Wiper Seals, Hydraulic Rod Seals, Hydraulic and Pneumatic Seals, Custom Molded & Extruded Products, Guides Strips, and other rubber products. Manufactured from various materials including Butyl Rubber (IIR), Natural Rubber (NR), Ethylene Propylene Rubber (EPDM), Acrylonitrile Butadiene (NBR – Nitrile), Carboxylated Nitrile (XNBR), Hydrogenated Nitrile (HNBR), Fluorocarbon (FKM), TFE/P (AFLAS ®), Silicon (VMQ), Fluorosilicone (FVMQ), Styrene Butadiene Rubber (SBR), Chloroprene Rubber (CR), and Perfluoro Elastomer (FFKM).

Technical Parameters:
– Inner Diameter (I.D), Cross Section (C.S)
– Various International Standards (e.g., AS-568A)

Application Scenarios:
– Aero Engines
– Air Compressors
– Agro Products
– Earth Moving Machinery
– Chemical Plants
– Diesel Engines
– Dairy Equipments
– Hydraulic & Pneumatic Cylinders
– Brake systems (for EPDM)

Pros:
– Stretchable
– Supplied in safe packing
– Available in many colors
– High quality
– Excellent value for money (for kits)

Cons:
– Generic placeholder
– Generic placeholder

Related Video

Comparison Table

Company	Product Details	Pros	Cons	Website
Custom O-ring Manufacturer and Wholesale Supplier – Hongju	Custom and standard size silicone rubber O-rings and high-temperature O-ring seals. Available in various colors and materials. Manufactured using com…	– High quality – Certified materials – Fast turnaround time – Competitive wholesale prices – Customizable designs and materials – Free samples availab…	– Generic placeholder – Generic placeholder	hongjusilicone.com
Top 10 O-ring Manufacturers and Suppliers in China (2024)	O-rings (standard and metric sizes), silicone rubber parts, gaskets, seals, keypads, grommets, neoprene gaskets, medical silicone products, plastic o-…	– Wide range of products – Fast delivery – Good customer service – Low minimum order quantities (MOQs) – Customization available – Competitive pricing…	– Insufficient information to list specific cons	hongjusilicone.com
Custom Rubber Seals & O-rings Manufacturer	Haisun Rubber	Custom rubber seals and high-precision O-rings. Specific types include NBR, HNBR, VMQ, FKM, EPDM, ACM, and CR O-rings, as well as oil seals, rubber x…	– IATF16949 certified factory – ISO Class-100,000 clean rooms for assembly and relubrication	– Generic placeholder – Generic placeholder
O-Rings, Rubber Seals – Best China Manufacturer & Supplier – Savvy	O-rings are circular cross-section rubber sealing rings used to seal various fluids (air, water, oil). Savvy Rubber manufactures standard and custom o…	– Simple structure, small size, compact installation – Self-sealing effect, low cost, wide application	– Large starting friction resistance in compression sealing – Prone to damage (cutting, twisting, breaking) if improperly used	savvyrubber.com
Top 10 O-Rings Manufacturers in China – News – qlrubber.com	O-rings, quad-rings, V-rings, rubber balls, grommets, washers, gaskets, bumpers, bushings, plugs, bellows, extrusions, rubber hoses, O-ring cord, rubb…	– Custom production capabilities – Wide range of materials available	– None explicitly stated in the provided text	www.qlrubber.com
China O Rings Suppliers, Manufacturers, Factory – Customized O Rings …	Jinbond offers a range of static seals including O-rings, Heavy Duty Static Seal JB-17 (alternative to O-rings and anti-extrusion rings for high-press…	– High efficiency (JB-17) – Prevent O-ring extrusion	– Insufficient information to determine cons – Insufficient information to determine cons	www.jinbondseal.com
China O Ring Manufacturers Factory – Customized O Ring Made in China	O-rings, customized and bulk, made in China. Various sizes and materials available for different applications. Specific O-ring examples include fuel…	– High quality – Competitive price – Customized options available – Bulk wholesale options	– Specific cons are not listed on the website. – No information on material specifications or tolerances.	www.jinwoparts.com
O’rings – Sealing Australia	O-rings are torus-shaped rings used to prevent leakage of fluids and gases by filling clearance gaps between mating hard surfaces. They are typically…	– Simple and economical design – Widely used and readily available – Effective in preventing leakage	– Susceptible to failure due to incompatibility with operating environment – Prone to extrusion failure under high pressure – Requires careful conside…	sealingaustralia.com.au
Marco Rubber & Plastics – Sealing Products & Solutions	O-rings, basic seals, performance seals (spring-energized seals, glide rings, backup rings), custom molded seals, gaskets, and other custom components…	– Large inventory of specialty and standard sealing solutions – Fast response and same-day shipping for in-stock products – Expert engineering support…	– Cheap seals can be costly in the long run (implied) – Generic placeholder	www.marcorubber.com
O Ring, O-Rings India, Rubber O Rings, Oil Seals, ISG Rubber Industries	O-Rings, Rubber O-Rings, Oil Seals, Extruded O-Ring Cords, Extruded Profiles, O-Ring Kits, Splicing Kits (Standard, Metric, Four Lobed Profile, Square…	– Stretchable – Supplied in safe packing – Available in many colors – High quality – Excellent value for money (for kits)	– Generic placeholder – Generic placeholder	www.oringsindia.com

Frequently Asked Questions (FAQs)

1. What types of O-rings do Chinese factories produce?

You’ll find a huge variety! Chinese O-ring factories produce o-rings in countless sizes, materials (like rubber, silicone, PTFE), and durometers (hardness levels). They cater to a wide range of industries, from automotive and aerospace to medical and food processing, so you’re likely to find exactly what you need.

2. How can I ensure the quality of O-rings from a Chinese factory?

Thorough due diligence is key! Request samples for testing to verify material properties and dimensions. Look for factories with ISO certifications (like ISO 9001) demonstrating their commitment to quality management. Consider conducting on-site audits or using a third-party inspection service to assess the manufacturing process.

3. What are the typical lead times for O-ring orders from China?

Lead times vary depending on order size and the factory’s current workload. Smaller orders might be fulfilled within a few weeks, while larger, more complex orders could take several months. Always clarify lead times upfront with your chosen supplier to avoid delays in your project.

4. Are there minimum order quantities (MOQs) for O-ring purchases?

Yes, most Chinese O-ring factories have MOQs. These vary significantly depending on the specific O-ring type and the factory. Smaller factories might have lower MOQs, while larger ones often require larger orders. Negotiating with the supplier is sometimes possible, especially for repeat business.

5. What are the typical payment methods used when dealing with Chinese O-ring factories?

Common payment methods include wire transfers (TT), Letters of Credit (LC), and sometimes escrow services. Wire transfers are frequently used for established relationships, while Letters of Credit offer greater buyer protection. Always discuss payment terms and methods clearly with your supplier before placing an order to ensure a smooth transaction.