Key words: NBR, HNBR, FKM, EPDM, silicon, NR, miscellaneous hardware


Product Center

A research fluid sealing technology and engaged in the production and circulation of rubber industrial products enterprises

Silicone Bracelet
Cat's Claw Silicone Ice Tray
Six-hole spherical silica gel ice tray assembly
Honeycomb silicone ice tray
30 grid silicone ice tray
Silicone Popsicle Mold
Silicone bath brush
Silicone ice tray mold
O-ring manufacturer
O-ring manufacturer
Shenzhen O-ring
Flange seal
Skeleton oil seal
Rubber parts customization
Automotive air conditioner seals oil seals
Waterproof sealing rubber ring
Hardware bathroom seal
Hardware package rubber silicone
Silicone bag hardware
Air-conditioning Refrigeration O-ring Seal
Air conditioning cushion
Central air conditioning cushion
O type rubber ring
O-ring manufacturer
O-rings customized
Rubber O-ring
Silicone Earphone Sleeve
Rodent Pioneer Silicone Toys
Silicone Wristband
Rodent Pioneer Silicone Toy Production
Silicone Hose
Silicone hose
Silicone buttons

Product advantages

A research fluid sealing technology and engaged in the production and circulation of rubber industrial products enterprises

Nai Megatherma

Delong sealing ring has good high temperature resistance and medium resistance, even at high temperature, it can still maintain good medium resistance and compression deformation resistance.
Flame retardant, good air permeability. It is used in high temperature, ozone resistance and weather resistance.

Nai Corrosion

High mechanical strength, good abrasion resistance, extrusion resistance, high pressure resistance, tear resistance and high tear strength. Good elasticity and ozone resistance. It is widely used in mineral hydraulic oil, silicone oil, HFA / HFB type flame retardant liquid, and some brands are suitable for heat up to 50 ℃.

Nai Abrasion

It is suitable for mineral hydraulic oil, grease, silicone oil, flame retardant liquid and 80 ℃ hot water. Because of its good comprehensive mechanical properties and oil resistance, it is widely used as a hydraulic sealing material.


Industry application

A research fluid sealing technology and engaged in the production and circulation of rubber industrial products enterprises









Application Field

Provide industry solutions

According to the special needs of your industry to provide you with professional product solutions

Customized service to customize your every exclusive seal

Customize Your Custom Seals With A Full Custom Service

About us

A research fluid sealing technology and engaged in the production and circulation of rubber industrial products enterprises

About Us

Shenzhen Delong Xingye Sealing Technology Co., Ltd.

Shenzhen Delong Xingye Sealing Technology Co., Ltd. has more than 10 years of history in the rubber seal industry. With its strength in fluid sealing technology and special rubber product manufacturing, it has concluded a set of development systems suitable for the sealing industry.


More than 10 years of history


130 franchisees


Has a group of experienced backbone members


24-hour professional customer service online answer

News Center

A research fluid sealing technology and engaged in the production and circulation of rubber industrial products enterprises

O-rings made of fluorine rubber, collectively referred to as fluorine rubber O-rings, are annular products made of fluorine rubber. With the development of industry, fluoroelastomer O-rings are widely used in automotive, electronics, aerospace, marine and other working environments that require high precision, high temperature resistance, wear resistance, and harsh conditions. With the development of industry, fluorine rubber materials are constantly improving and innovating. What are the properties of fluorine rubber o-rings? Hardness: 50-90 degrees. Color: usually made into black, blue, brown, green, can also be customized according to customer's color. Advantages: It can resist heat to 250 ℃. It has the ability to resist most oils and solvents, especially all acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils. Disadvantages: It is not recommended to use in class, low molecular weight class and containing mixture.   What are the applicable scopes of fluorine rubber o-rings? Uses of rubber seals: seals for automobiles and locomotive engines and fuel systems, and seals for chemical plants. The main characteristics of fluorine rubber are high temperature resistance and chemical resistance, and it has good anti-aging and ozone resistance. Moreover, the permeability is also very low, the timely working environment is very poor, and it also has good abrasion resistance. Fluorine rubber can withstand a working temperature of +200 degrees or below, and can run without oil for a short time. Fluorine rubber is resistant to lubricating oil, hydraulic oil, fuel oil, lubricants, inorganic acids, aliphatic hydrocarbons and aromatic hydrocarbons, etc., and there are compounds such as esters, ethers, certain amines and high-temperature fluorine, water and hydrogen. It is not allowed to be used fluororubber. Under normal working conditions and working temperature below +200 degrees, fluorine rubber is very stable and harmless. However, when encountering high temperatures above 300 degrees, such as the flame of gas cutting, fluorine rubber will release harmful gases. Inhaling these gases or entering the eyes can cause damage to human health. Delong Xingye professional seal ring and oil seal suppliers remind you: Once the fluorine rubber O-ring is heated to a high temperature of more than 300 degrees, it will be dangerous even if it is processed after cooling, so it must not be directly contacted with the skin.
Although O-rings are small, they are widely used in ships, automobiles, and aerospace equipment, as small as ordinary faucets, gas valves, refrigerators, disinfection cabinets, washing machines, etc. Improper selection may inevitably cause unnecessary losses. So what are the key considerations in our selection? The first choice is the material of the O-ring, because the material is different and the performance is different. The common materials for O-rings are: NBR nitrile rubber, NR natural rubber, CR neoprene, EPDM ethylene propylene rubber, HNBR hydrogenated nitrile rubber, SILICO ME silicone, FKM/VITON fluorine rubber, FLS silicone fluorine rubber , PU polyurethane, SBR styrene butadiene rubber, Buna rubber, acrylic rubber ACM, PTFE polytetrafluoroethylene and so on. Then there is the size selection of the O-ring, because the size is incorrect and it cannot be used The size of the O-ring is generally called the outer diameter, inner diameter, and wire diameter to express. We need to mark the dimensions of the inner diameter and the wire diameter on the design drawings, and the outer diameter is equal to the inner diameter + 2 * wire diameter. Or only mark the dimensions of the outer diameter and the wire diameter. Finally, the specification tolerance of the O-ring. Because tolerance determines the effect The specification tolerances of O-rings mainly include inner diameter tolerance and wire diameter tolerance. The tolerance of O-ring specifications mainly depends on the size of the size. The larger the size, the larger the tolerance.   Shenzhen Delong Xingye Company develops/produces type 0 seals, fluorine rubber 0-rings, silicone 0-rings, etc., with complete models, specifications and sizes, and low prices. It meets national production standards, supports customized processing, free samples, and direct sales at factory prices.
O-shaped rubber ring seal is abbreviated as O-ring, which is a rubber ring with a circular cross-sectional shape. O-rings are the most widely used seals in hydraulic and pneumatic systems. O-ring has good sealing performance and can be used for static sealing and dynamic sealing; O-ring can still play a good sealing and shock absorption effect in oil, acid, alkali, abrasion, chemical erosion and other environments, and can be used alone , Is also a basic part of many combined sealing devices. O-ring seals are the most widely used seals in hydraulic and pneumatic transmission systems. O-ring seals are suitable for installation on various mechanical equipment, at specified temperatures, pressures, and different liquid and gas media. Play a sealing role in static or moving state. Various types of seals are widely used in machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instruments and meters. element. O-rings are mainly used for static sealing and reciprocating sealing. When used for rotary motion sealing, it is limited to low-speed rotary sealing devices. O-rings are generally installed in a groove with a rectangular cross-section on the outer circle or the inner circle for sealing. Delong Xingye Sealing Co., Ltd. specializes in the production of oil seals, o-rings, seals, rubber rings, seals, PTFE gaskets, etc. It is a comprehensive company integrating R&D, production and sales. Since its establishment, it has been in line with The principle of honesty and credit has established a stable cooperative relationship with many customers

Company address:

103, 1st floor, building 7, Ailian Industrial Zone, Wulian Xieping, Longcheng street, Longgang District, Shenzhen

contact information:
 0755-28962355  /

Link: Shenzhen Delong Xingye seal ring manufacturer - high temperature seal ring - O-ring - Delong Xingye rubber seal ring

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