Are you looking for the best EPDM O-ring factories in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare the top EPDM O-ring manufacturers in China, highlighting their strengths, product ranges, and what sets them apart. Let’s dive in and find the perfect fit for your needs.

China EPDM O Rings Manufacturers and Suppliers

Top 10 EPDM O-rings Manufacturers and Suppliers in China …

Product Details: Hongju Silicone Co, Ltd. is a professional manufacturer of rubber products located on the outskirts of Dongguan city in China, established in 1999. The company is well-equipped with a team of experienced professionals and offers manufacturing and design services for EPDM O-rings and other rubber products. They provide customized product manufacturing, using high-quality raw materials and precision molds to meet various extreme use environments. Their product range includes EPDM O-rings, rubber seals, gaskets, and more, complying with international safety standards like CE, SGS, REACH, and ROHS Directive requirements.

Pros:
– Excellent customer support
– Customized product manufacturing services
– High-quality EPDM O-rings
– Advanced machinery
– Strict quality control over the production process

Cons:
– None explicitly mentioned for Hongju Silicone Co, Ltd.

China Best O-rings Suppliers and Manufacturers

China Rubber O-Ring Seals, different size and material oring …

Product Details: Product name: O Ring / O-Ring Seals. Color: Any color, according to customer requirements. Hardness: 40-90 Shore A. Material: NBR, FKM, Silicone, EPDM, HNBR, CR. Working temperature: -48~+260 C. Resistance: Oil/High Temperature/Ozone/Water/Chemical Resistant. Supply Ability: 10,000,000 Piece/Pieces per Month. Packaging: Inner is plastic bag, outer is carton, or custom as per your requirement. Place of Origin: China Ningbo. Lead Time: Depending on the number of products. Certificates: ISO9001/TS16949, SGS, FDA, RoHS, REACH.

Pros:
– Wide range of materials available (NBR, FKM, Silicone, EPDM, HNBR, CR) to suit v…
– High temperature and chemical resistance.
– Customizable colors and sizes.
– Compliant with multiple certifications (ISO9001/TS16949, SGS, FDA, RoHS, REACH).
– Experienced quality control and assurance system.
– OEM and ODM options available.

Cons:
– Minimum Order Quantity (MOQ) is 5,000 pieces, which may be high for small-scale…
– Lead time depends on the number of products, which could be variable and potenti…

Wholesale Colored EPDM O-rings for Sale

Product Details: EPDM O-rings are made from Ethylene Propylene Diene Monomer (EPDM), a copolymer of ethylene and propylene with a small amount of a third monomer for vulcanization. They are available in a hardness range of 40 to 90 Shore A and can be manufactured in various colors including black, brown, green, white, rust, yellow, blue, red, orange, purple, and gray. The service temperature range is typically from -55°C to 125°C, or up to 150°C for peroxide-cured systems[1][2][4].

Pros:
– Excellent resistance to ozone, sunlight, and weathering
– Good flexibility at low temperatures
– Good chemical resistance to many dilute acids and alkalis, as well as polar solv…
– Good electrical insulation properties
– Suitable for hot water or steam applications up to 150°C
– Durable and reliable in outdoor and low-temperature environments
– Resistant to water, steam, and certain chemicals

Cons:
– Not suitable for use with petroleum fluids (fuels, mineral oils, greases)
– Not recommended for use with oils, fuels, or solvents as they can cause degradat…
– Sulfur-cured EPDM can be prone to hardening and have an inferior compression set…

Top 10 China EPDM O-RING Manufacturers

Product Details: EPDM O-rings are made from Ethylene Propylene Diene Monomer (EPDM) rubber, known for their excellent resistance to oxidation, ozone, and corrosion. They are used in high-temperature water vapor environments, sanitary equipment, and refrigeration equipment. Key specifications include a temperature range of -50°C to 150°C, durometer hardness range of Shore A 40-90, and standard sizes according to AS568, BS 1806, ISO 3601, DIN 3771, and JIS B 2401 standards[3][4].

Pros:
– Excellent weather resistance, aging resistance, and ozone resistance
– Good chemical stability and compatibility with glycol-based brake fluid
– Low specific gravity and ability to absorb a large number of fillers and oils wi…
– Customizable sizes and shapes, with low mold/tooling costs and fast delivery
– Wide range of applications including high-temperature environments and sanitary…

Cons:
– May not be suitable for applications requiring high oil resistance, as EPDM has…
– Can be more expensive than some other rubber materials like NBR for certain appl…
– Limited compatibility with certain chemicals, which may require the use of other…

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 makes up about 50% of o-rin…
– 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.

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 O Rings, China NBR O Ring supplier

EPDM Waterproof O Ring

Product Details: EPDM O-rings are made from ethylene-propylene-diene monomer (EPDM) rubber, a synthetic elastomer known for its exceptional resistance to weathering, ozone, UV exposure, water, steam, and certain chemicals. They are available in various dimensions and hardness levels, with 70 Shore A being the most common. EPDM O-rings are produced through compression molding and injection molding and are compliant with standards such as DIN ISO 3601. They can operate in a temperature range of -40°C to +150°C, depending on the curing method, and are suitable for applications in HVAC systems, automotive, water treatment, and outdoor environments.

Pros:
– Outstanding resistance to weathering, ozone, and UV exposure.
– Excellent resistance to water, steam, and certain chemicals.
– High elasticity and good abrasion resistance.
– Suitable for low-temperature conditions and moderate temperatures up to 300°F (1…
– Ideal for applications in HVAC systems, automotive, and water treatment.
– FDA compliant for food and general applications.

Cons:
– Not recommended for use with oils, fuels, or solvents as they can cause degradat…
– Not suitable for environments involving petroleum-based oils and greases, alipha…
– May require lubrication with non-petroleum-based greases or water-based solution…

China Factory Rubber ORing Seals NBR FKM FPM EPDM …

Comparison Table

Frequently Asked Questions (FAQs)

Here are five frequently asked questions (FAQs) about EPDM O-ring factories in China

What is EPDM and why is it used in O-rings?

EPDM, or Ethylene Propylene Diene Monomer, is a type of synthetic rubber known for its excellent resistance to heat, ozone, and chemicals. It is widely used in O-rings because it provides a durable and reliable seal in various applications, including automotive, industrial, and construction sectors.

How do I find a reliable EPDM O-ring manufacturer in China?

To find a reliable EPDM O-ring manufacturer in China, you should research and compare different suppliers. Look for manufacturers that have certifications such as ISO 9001 and comply with international standards. Check their product catalog, read reviews, and ask for samples to ensure the quality meets your needs.

What are the typical lead times for ordering EPDM O-rings from Chinese manufacturers?

The lead times for ordering EPDM O-rings from Chinese manufacturers can vary depending on the complexity of the order and the production capacity of the factory. Generally, standard orders can be delivered within 2-4 weeks, while custom orders may take 4-6 weeks or more.

What are the minimum order quantities (MOQs) for EPDM O-rings in China?

The minimum order quantities (MOQs) for EPDM O-rings in China can vary among manufacturers. Some suppliers may have a low MOQ of a few hundred pieces, while others may require larger quantities, especially for custom designs. It’s best to check directly with the manufacturer for their specific MOQ requirements.

How can I ensure the quality of EPDM O-rings from Chinese manufacturers?

To ensure the quality of EPDM O-rings from Chinese manufacturers, you should request samples before placing a large order. Additionally, look for manufacturers that conduct regular quality control checks and have certifications from reputable third-party inspection services. You can also consider visiting the factory or hiring a third-party inspector to verify the quality.