Silicone O-ring Manufacturer

Silicone O-Rings are circular seals set in cylindrical applications to prevent media passing through joints and other breaks in construction. These o-rings are easy to install, versatile, and have capacity to handle pressures.

Silicone o-rings can handle pressure exerted by hydraulic cylinders over their seals. They are used in various types of motionless or movable joints and piping. silicone o-rings are extensively aused in aerospace and automotive fields.

We are a leading supplier of silicone o-rings. We provide high quality and well-customized and standard o-rings.

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What Are The Characteristics of O-ring?

The O-ring is a cross-section of a circular rubber ring. O-ring is the most widely used seal component in hydraulic and pneumatic systems. O-ring has good sealing properties, can be used for static seals, and also can be used in reciprocating movement seals; Not only can be used alone but also as the basic component of many combined sealing devices. Its application range is very wide, if the material is properly selected, and can meet the requirements of various movement conditions, the working pressure can be from 1.333×105Pa vacuum to 400MPa high pressure; The temperature range is from -60℃ to 200℃.

Compared with other sealing types, O-ring has the following characteristics:

1) Small structure size, easy to assemble and disassemble.

2) Static and dynamic seals, almost no leakage when used as a static seal.

3) The use of a single O-ring, two-oriented sealing effect.

4) The kinetic friction resistance is small.

5) Low prices.

silicone o-ring

The O-ring is one of the most common and useful parts of machine design. Silicone typically is a top choice material for o-rings. Silicone o-rings are used in different applications, such as medical devices, waterproof camera housings, automotive cars, and more. Silicone o-ring is also called silicone seal or custom molded o-ring.

 The Molding Technologies For Custom Silicone O-ring

• Compression Molding

Compression molding is commonly used to manufacture complex shapes such as leather bowls, and silicone O-rings with the help of two molds. The silicone material will be placed in the molds to heat and form.

• Injection molding

It is a method of continuous modeling by putting a certain thermoplastic material into the hopper of the extruder under the extrusion of the inner screw through a variety of plates. The silicone rubber must be preheated before pressing to make the rubber soft and easy to extrude, further manufacturing a smooth surface and accurate size of silicone O-ring.

• Calendering Molding

 It is a process that molding silicone rubber through a calendering machine pressed into a silicone rubber piece with a certain thickness. Some rubber products such as tapes, hoses, and other textile fiber materials must be coated with a thin layer of glue. And this process is generally completed in the calender. The fiber material needs to be dried and dipped before calendering, the purpose is to reduce the moisture content of the fiber material, to avoid water evaporation and bubbling, and improve the temperature of the fiber material, to ensure the quality of the calendering process.

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 Silicone O-ring VS Rubber O-ring

We manufacture our components with pure Silicone Rubber. There are many materials are used to manufacture, including silicone and natural rubber. What difference between silicone and natural rubber?

Serving time

The serving time of silicone or rubber-related products is a vital issue for many industries. Silicone lasts four times as long as rubber but costs two or even three times as much. Therefore, silicone o-ring owns a longer life and more cost-efficient saving in a long run.

The ability to resist ultraviolet light or extreme temperatures

Rubber is a dye material that changes from the moment it is produced. The change of pressure and temperature as well as exposure to the condition of UV light can speed up the damage level of rubber o-ring, which in turn can affect density, color, hardness, and texture. Silicone, however, is not affected by ultraviolet light or extreme temperatures.

• Applications in the Medical and Food Processing Industry

Silicone o-ring is widely applied in medical and food processing industries for its unique properties. The service life of silicone and its resistance to pressure and temperature make it an ideal material that can withstand longer sustained stresses and pressures than rubber without corroding or cracking in the process. Less pollution, long-term financial savings, and overall more hygienic construction all contribute to the advantages of using silicone.

How To Identify Various Colored O-rings?

O-rings come in different colors, indicating their color can help you choose a suitable o-ring better.

I.Yellow O-ring

Yellow o-ring, manufactured by HNBR((Hydrogenated Nitrile Butadiene Rubber), is mainly used in gas applications, with the standard EN549.

The standards are also different. EN 681-1 Yellow O-ring for water, while EN 549 Yellow O-ring for gas.

EN 681-1 Yellow O-ring can work at the temperature from -20 degrees to +95 degrees, while EN 549 Yellow O-ring can work at the temperature from -20 degrees to +70 degrees.

II. Black O-ring

Black o-ring is manufactured by EPDM( Ethylene Propylene Diene Monomer) Rubber, applied for heating, fire  prevention, drinking, and sanitary applications

EN 681-1 standard black o-ring works at the temperature from -20 degrees to +70 degrees.

EPDM o ring

III. Green O-ring

Green o-rings are made from FKM and operate perfectly at high temperatures and fluctuating stress levels – making them ideal for systems such as solar power. Their maximum temperature reaches 160 degrees, but they can peak at 200 degrees in a short period if needed.

Silicone O-ring Supplier& Customization O-ring Options

Custom o-ring need to meet stringent specifications and demands. That is why we offer custom materials and custom services to guarantee support from prototype design through mass production and packaging. Our customization options include:

• Material choice: solid silicone rubber, liquid silicone rubber, food grade silicone, medical grade silicone, custom molded silicone.

• Chemical resistance

• Durometer hardness

• Temperature resistance

silicone o-ring manufacturer
Custom Your Silicone O-ring

• Color

• Insulation resistance

• Standard requirements, including FDA, MIL-Spec, NORSOK M-719, NSF, USP, and more

• Label and package need

And Much More

Custom Industry Service

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We welcome your question and our sales team will be happy to assist you with all of your custom silicone needs.