Are you looking for the best silicone O-ring factories in China? With so many options available, it can be overwhelming to choose the right one. Here’s a guide to help you compare the top silicone O-ring manufacturers, highlighting their unique features, materials, and services to make your decision easier. Let’s dive into the key players: ### Dongguan Hongju Silicone Rubber Products Co., Ltd. Known for their customized silicone rubber products, Hongju accommodates low minimum order quantities and offers free samples

Top 10 Silicone O-Ring Manufacturers and Suppliers in China …

Custom O-Rings, Custom Molded O-Ring China …

Product Details: Savvy offers custom o-rings designed and produced in various cross-sections and shapes. These o-rings are defined as custom if their cross-section is outside the range of standard o-rings or if they have non-round outline shapes such as square, rectangular, or other irregular shapes. To produce custom o-rings, the inner diameter (ID) and cross-section (CS) are required, or a drawing if the shape is irregular. Custom o-rings are used in industries like hydraulics, oil and gas, semiconductor processing, aerospace, food processing, water filtration, electronic products, machinery fabrications, plastic sealing, automotive, and medical equipment. The materials used include NBR, FKM, Silicone, EPDM,

HNBR, CR, Aflas, etc. The hardness of o-rings ranges from Shore A 40 to 90, with common hardness being 60-70. Custom o-rings can also be produced in various colors based on the RAL or Pantone color number provided by the customer.

Pros:
– Custom o-rings can be tailored to specific application requirements with various…
– Strong cost control management ensures low prices while maintaining high quality…
– Wide range of materials available, including NBR, FKM, Silicone, and others, to…
– Custom o-rings can be produced in various colors to meet specific needs.
– Savvy offers design services if the customer cannot provide a drawing.

Cons:
– Custom o-rings are used in lower volumes than standard o-rings, resulting in hig…
– Production requires close communication and cooperation between the customer and…
– Unique colors or irregular shapes may increase the cost and require a larger min…

China O Rings Manufacturers and Suppliers

FKM O Rings, China NBR O Ring supplier

Product Details: The products offered by www.o-ringsseals.com include a wide range of o-ring seals made from various materials such as NBR (Nitrile Rubber), FKM (Viton), EPDM, Silicone, HNBR, and more. These o-rings are available in standard sizes like AS568, ISO 3601, JIS-B2401, DIN-3771, and BS-1516, as well as non-standard sizes. The company, ORK, has two factories located in Shangrao City, Jiangxi Province, and Dongguan City, Guangdong Province. The products are certified with ISO9001, TS16949, FDA, ROHS, and REACH compliance. The temperature range for these o-rings varies from -60°C to 326°C depending on the material. The o-rings are used in various applications including

automotive, construction machinery, food, health, water treatment, and chemical processing[1][3][5].

Pros:
– Good shock-proof, heat insulation, and sound insulation performance[1].
– Excellent flexibility and anti-compressive deformation, chemical resistance[1].
– Long lifetime and high durability, with some products lasting up to 10 years[4].
– Excellent low temperature resistance and high temperature resistance[2][4].
– Easy installation and reduces risk[3].
– Wide range of materials available to suit different applications[1][2][5].
– Customizable specifications, packing requirements, and colors according to custo…
– Fast delivery with immediate shipments available for in-stock sizes[5].
– Free samples available if in stock, with only express cost to be paid[1][5].

Cons:
– Minimum Order Quantity (MOQ) requirements, which can be 100-150 units depending…
– Payment terms require 100% advance payment for orders under $1000/$2000, and 30%…
– Potential delays for custom or non-stock orders, with lead times ranging from 15…

China O-Ring Kits Suppliers – NNK Oil Seal

Product Details: The Universal Type O-Ring Kit Box 30 size is a professional-quality assortment of O-rings. It includes 382 pieces of O-rings in 30 of the most popular sizes, both in inches and millimeters. The O-rings are made from commercial-grade nitrile butadiene rubber (NBR) and fluoroelastomer (FKM), with a hardness range of 60-90 Shore A. They are resistant to oil, chemicals, and high pressure, and can operate in temperatures from -40°C to 260°C. The kit is suitable for various applications, including machines and excavators. The O-rings are UV resistant and have a thick wall construction for maximum protection and durability. The kit

is ISO9001/TS16949 certified and meets ASTM D 2000 standards.

Pros:
– Professional quality and commercial-grade materials (NBR and FKM)
– Wide range of sizes (30 sizes) and quantities (382 pieces)
– High resistance to oil, chemicals, and high pressure
– Operates in a broad temperature range (-40°C to 260°C)
– UV resistant and thick wall construction for durability
– Suitable for various applications including machines and excavators
– Meets ASTM D 2000 standards and ISO9001/TS16949 certified

Cons:
– No specific cons mentioned, but users need to ensure the correct size and materi…
– May require additional backup rings for elevated operating pressure environments

China Silicone O Ring

Product Details: Silicone O-rings are synthetic elastomers based on silicon with pendant organic groups such as methyl, phenyl, and vinyl. They are available in various types, including VMQ, PVMQ, and FVMQ, and can be formulated to meet specific requirements such as FDA, USP Class VI, and other industry standards. They come in different hardness levels (30 to 80 durometer Shore A) and colors, and can be custom-made for various applications.

Pros:
– Excellent heat, ozone, and corona resistance
– Good dielectric stability and resistance to many oils, chemicals, and solvents
– Retention of flexibility and low compression set characteristics over a wide tem…
– Superior insulating properties and resistance to UV light, water, oxygen, and mo…
– Non-toxic and biocompatible, making them suitable for medical and food applicati…
– Can be formulated to meet specific needs such as conductivity, color, and temper…

Cons:
– Low tensile strength and low wear and tear resistance
– Not suitable for concentrated acids and alkalis, steam over 120°C (248°F), petro…
– May require higher cost for platinum-cured versions which offer better flexible…
– Can stretch easily during installation if in low durometers

Large silicone store o rings – Kin by Rice n Roll

Custom O-ring Manufacturer and Wholesale Supplier

Product Details: Hongju Silicone offers custom and wholesale O-ring seals made from high-quality silicone and rubber materials. These O-rings are designed for various applications, including engines, pumps, cylinders, connectors, and valves. They are available in standard and custom sizes, following ISO3601 standards for dimensions and tolerances. The manufacturing process includes design, tool making, color mixing, compression molding, and strict quality inspection. Materials can be customized, including liquid silicone rubber, and the company provides free samples for testing. The O-rings are resistant to water, oil, and high temperatures, making them suitable for extreme use environments.

Pros:
– High-quality raw materials and precision molds ensure strong resistance to water…
– Wide selection of stock items at wholesale prices, along with customization capa…
– Fast delivery and good customer service.
– Ability to meet special needs by redesigning the mold.
– Free samples available for testing.
– Low minimum order quantities (MOQs).

Cons:
– The hardness tolerance is plus or minus 3-5A, which may not be suitable for all…
– Silicone O-rings have poor tear resistance and are not ideal for dynamic applica…

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 to customize colors based on RAL or Pantone standards.

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.
– Available in various colors for easy identification and customization.

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 non-commonly used colors may increase the cost and require a larger MO…

O-Rings | China – Products | Parker NA

Product Details: Parker O-Rings are circular sealing elements with circular cross-sections, primarily used in static applications. They are available in various materials, including nitrile rubber (NBR), fluorocarbon (FKM, FPM), ethylene propylene rubber (EPDM), hydrogenated nitrile (HNBR), polychloroprene rubber (CR), and silicone (VMQ). Each material has specific applications and compatibility with different fluids and environments. For example, FKM O-Rings are focused on explosive decompression, oil & gas, and dynamic applications, while EPDM O-Rings are suited for food & beverage, chemical processing, and pharmaceutical applications. NBR O-Rings are compatible with oils and gases, and HNBR O-Rings offer good mechanical robustness for automotive and heavy-duty

applications[4].

Pros:
– Wide range of materials to suit various applications and environments
– High chemical resistance and compatibility with oils, gases, and other fluids
– Ease of service, no smearing or retightening required
– No critical torque on tightening, reducing the risk of structural damage
– Lightweight and require minimal space
– Cost-effective and can be reused in many cases
– Gradual failure mode, making it easy to identify and replace

Cons:
– Specific materials have limitations in compatibility with certain fluids (e.g.,…
– Some materials are not resistant to polar solvents, strong acids, or chlorinated…
– Material selection must be carefully considered based on the application to avoi…
– Can be affected by ozone, weather, and atmospheric aging in some cases

Comparison Table

Frequently Asked Questions (FAQs)

What materials are commonly used by silicone O-ring factories in China?

Silicone O-ring factories in China often use a variety of materials to cater to different needs. The most common materials include silicone itself, as well as other elastomers like Nitrile (NBR), Ethylene Propylene Diene Monomer (EPDM), Fluorocarbon (FKM or Viton), and Hydrogenated Nitrile Butadiene Rubber (HNBR). These materials are chosen based on their properties, such as resistance to chemicals, temperature, and wear, to ensure the O-rings meet specific application requirements.

Can I customize the size and design of silicone O-rings from Chinese manufacturers?

Yes, you can customize the size and design of silicone O-rings from Chinese manufacturers. Many factories, such as Dongguan Hongju Silicone Rubber Products Co., Ltd. and Tianjin SWKS Technology & Development Co., Ltd., offer OEM and ODM services. This means you can provide your design drawings or specifications, and they will produce the O-rings according to your needs, including custom sizes, shapes, and materials.

What are the typical minimum order quantities (MOQs) for silicone O-rings from Chinese factories?

The minimum order quantities (MOQs) for silicone O-rings can vary depending on the manufacturer. However, many Chinese factories have relatively low MOQs to accommodate smaller orders. For example, some manufacturers may have MOQs as low as 10-100 pieces, while others might require 500-1000 pieces. It’s always a good idea to check with the specific factory you’re interested in to confirm their MOQ.

Do Chinese silicone O-ring manufacturers provide certifications and quality assurance?

Yes, many Chinese silicone O-ring manufacturers provide certifications and ensure quality assurance. Companies like Shenzhou City Sanshi Rubber Co., Ltd. and Qingdao Kairuite Sealing Parts Co., Ltd. hold certifications such as ISO 9001, ISO 13485, and IATF16949. These certifications indicate that the manufacturers adhere to international quality and safety standards, ensuring the products meet your requirements.

Can I get free samples from Chinese silicone O-ring factories for testing?

Yes, you can often get free samples from Chinese silicone O-ring factories for testing. Companies like Dongguan Hongju Silicone Rubber Products Co., Ltd. offer free samples to potential customers. This allows you to test the quality and performance of the O-rings before placing a larger order, giving you peace of mind and helping you make an informed decision.