Contact Haisheng Rubber ProductsService Hotline: 400-0590-280
- Phone: 0574-63405708
- Fax: 0574-63408757
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- Address of Company: Changhe Town Industrial Park, Cixi City, Zhejiang Province
Rubber O-rings are our most common rubber products. They are widely used, the production process is relatively simple, and many materials are used. Most of the causes of O-ring damage do not come from the design or pressure of the rubber O-ring. A good design will not cause damage to the o-ring if it only increases the pressure unilaterally. It is due to the permanent deformation of the o-ring under the high temperature and pressure of the working environment and the bite caused when it is squeezed into the gap. The rubber O-ring is a typical sealing effect caused by deformation. When it is installed, it comes into contact with the sealing surface. When the pressure is greater than the pressure of the sealing medium, the sealing effect occurs.
- 20-02 04 20-02
Rubber is subdivided into many materials. Among them, nitrile rubber NBR, silicone rubber PMQ / VMQ, ethylene-propylene rubber EPDM, and fluoro rubber FKM are common materials in rubber seals, so what are their respective media resistance? Next Haisheng Rubber will introduce to you. 1. Nitrile rubber NBR: suitable for petroleum products, air with oil vapor, vegetable oil and mineral oil, but not for phosphate ester series hydraulic oil and gear oil containing extreme pressure additives. The operating temperature is -40-120 ° C. 2. PMQ / VMQ silicone rubber sealing ring: suitable for drinking water, hot water, oil-free air and high-temperature steam, but not for petroleum media, the use temperature is -60-230 ℃. 3. EPDM ethylene-propylene rubber seal ring: suitable for hot water, dilute acid, oil-free air and many chemicals,
- 20-01 16 20-01
Silicone seals can be seen everywhere in our daily life, such as insulation cups, lunch boxes, crispers, water dispensers, etc. The shadow of silicone seals is indispensable. Silicone seals are so widely used, what are its advantages? ? 1. Environmentally friendly and harmless. Silicone sealing ring has strong adaptability to the environment. It can be placed under strong temperature and heated, and can maintain its original shape and state well without generating any harmful substances. 2. Silicone sealing ring has a good freshness-preserving effect, which can keep good fresh-keeping items without harmful substances. It is currently used for food-grade sealing. 3. The appearance of the silicone seal ring is good, and it can be adjusted to various colors, and it will not fade, yellow, or fade under long-term use. 4. It has good sealing performance, and it is not easy to leak when the structure is appropriate. 5. Silicone seal ring has good corona resistance, arc resistance, high temperature and low temperature resistance, and aging resistance. 6, good elasticity, even at minus fifty-six degrees, can still maintain good elasticity. 7, good electrical insulation performance, under high temperature conditions, electrical insulation performance can also be preserved. If you have any other questions, welcome
- 20-01 16 20-01
Rubber products are believed to be familiar to everyone. Common production processes include hot-press molding, injection molding, and extrusion molding. After production, some rubber products also require secondary vulcanization or secondary vulcanization. In fact, after molding, we look good to the naked eye. Why can we use secondary vulcanization when it can be used normally? Let's take a look at why Haisheng rubber takes secondary vulcanization? First of all, it should be noted that not all rubber products require secondary vulcanization, but depending on the raw material formula, some can be directly molded at one time, but some special materials such as fluorine rubber products and some EPDM rubber products The reasons for the need for secondary vulcanization are as follows: First, when these materials are vulcanized once, the peroxide in them will decompose.
- 20-01 16 20-01
Fluoro rubber O-rings are more resistant to media, heat, oil, and aging, so they are often used in various power plants, petrochemical systems, metallurgical systems and other demanding working conditions. The fluorine rubber O-ring seals, the seal ring manufacturers remind everyone to pay attention to the following issues. 1. Fluororubber O-rings are suitable for environments requiring high heat temperature and high chemical stability, mainly for special environments such as high additives and lubricants. 2. When selecting a suitable material for the seal, in addition to considering the temperature range of the seal, the properties of the liquid or gas in contact with it must also be considered. The expansion or contraction of the elastomer and the chemical stability are important factors that affect the stability of the seal. 3. Fluorine rubber is used to protect the seals from the highly aggressive environment and is suitable for high temperature and chemical stability.
- 20-01 16 20-01
The first point: high temperature resistance applicable temperature range -40 to 230 degrees Celsius, can be used in microwave ovens and ovens, so some lunch boxes and bowls are made of silicone rubber. Second point: Easy-to-clean silicone rubber processed silicone rubber products can be restored to clean after washing in water, or can be cleaned in a dishwasher. The third point: long life Silicone rubber compound has very stable chemical properties. Products processed by silicone rubber have a longer life than other materials. The fourth point: soft and comfortable Thanks to the softness of the silicone rubber material, the cake mold products are comfortable to the touch, extremely flexible and not deformed. Fifth point: Customized silicone rubber products with various colors can be formulated with different beautiful colors according to customer needs. Therefore, there are many silicone handicrafts on the market that are very beautiful and fashionable, and they have become intimacy for stars and others. Sixth point: environmentally friendly non-toxic customization
- 20-01 16 20-01
Currently nitrile rubber is one of the more commonly used seals for O-rings, but many people don't know much about its properties. This article takes everyone to understand some of the main properties of nitrile rubber O-rings. Nitrile rubber, referred to as NBR, is mainly produced by low-temperature emulsion polymerization. It is a synthetic rubber made by copolymerizing butadiene and acrylonitrile. It has good oil resistance, so O-rings with high oil resistance requirements are generally Nitrile rubber is used, which has higher abrasion resistance, better heat resistance and strong adhesion. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance and slightly lower elasticity. There are five kinds of acrylonitrile content (%) in the nitrile rubber: 42-46, 36-41, 31-35, 25-30, and 18-24. The more acrylonitrile content,
- 19-12 21 19-12
O-rings are widely used in various mechanical equipment seals. They provide a seal under static or moving conditions at specified temperatures, pressures, and different liquid and gaseous media. They also have high and low temperature resistance. Haisheng Rubber tells you to control the temperature range, maintain good sealing elasticity, and resistance to ozone, weathering and other advantages when using rubber seals. Secondly, the silicone sealing ring in the rubber sealing ring material has many excellent characteristics such as non-toxic and odorless, waterproof, flame retardant, high temperature resistance, wear resistance and oil resistance. It can be used for making thermal insulation, insulation products and medical silicone products. Pieces. So, what are the factors that cause the aging of O-type rubber seals?
- 19-12 20 19-12
Haisheng rubber takes you to know the points to pay attention to when selecting the seal ring material
The function of the seal ring is mainly to seal. There are many mediums to seal, mainly oil. It plays the role of dust and oil isolation in the application. The performance of the seal ring directly affects the performance of other equipment. Good or bad, and the material that determines the performance of the seal ring is first of all. So how to choose the material of the seal ring? What factors are related to it, today Haisheng Rubber will give you a detailed introduction. 1. Mechanical movement speed. The adaptability of the material of the seal to the speed of the machine is different. Some common materials cannot adapt to high-speed mechanical operation. Therefore, when selecting the material of the seal, choose a high-end one so that high-speed operation can be used. . 2. Stress. The material of the seal ring is also very sensitive to the pressure of the work. Different materials, the pressure they can withstand
- 19-12 19 19-12
During the production process, it will be found that the silicone products are brittle and very easy to break, which seriously affects the production, and the brittle silicone products do not meet the requirements in terms of service life. So, what are the reasons for the brittleness of silicone products? First, the structure or mold design of silicone products causes the product to easily break. The product structure or mold design is unreasonable, which will cause the silicone product to be easily broken during molding. Solution: Modify the structure of the product or mold to improve, for example, slightly thicken the excessively thin areas, and round the corners slightly. . Second, the molding temperature is too high or the vulcanization time is too long, resulting in brittle silicone products. Solution: reduce the temperature to control the curing time. 3. Poor ventilation or high temperature caused by secondary sulfur addition results in brittle silicone products. Solution: pay attention to adjusting the ventilation and control of secondary sulfurization
- 19-12 18 19-12
The seal without relative displacement of the two sealing surfaces during operation is a static seal. The sealing of the head and barrel of the pressure vessel, the seal of the reducer case and the cover, and the seal of the cylinder and cylinder head of the internal combustion engine are all static seals. 1. O-ring seal O-ring seal has a long life, compact structure, easy assembly and disassembly, and good sealing performance. Depending on the material, it can be used in the temperature range of -100 ℃ ~ 260 ℃ and its pressure of 100MPa. If you want to work under higher or lower temperature and pressure conditions, you need to choose the material to make it and use a metal hollow O-ring seal. He can work under 280MPa pressure and the temperature range is -250 ℃ ~ 650 ℃. 2. Gasket seal Gasket seal is the most commonly used form of static sealing. A gasket of different materials is placed between the sealing surfaces of the two connectors.
- 19-12 17 19-12
With the continuous development and progress of the social age, O-rings and gaskets in today's society are widely used in industry and life, but what kind of tightness may we tangled in the end? Haisheng Rubber takes everyone to understand their similarities and differences. O-rings are the same as gaskets: both meet this implicit condition: when the sealing contact pressure is greater than the pressure of the sealed medium, the sealing effect is maintained; when the sealing contact pressure is less than the pressure of the sealed medium, the gasket or O-shape The ring was ejected, and the medium leaked a lot. O-rings differ from gaskets: flat gasket seals consist of gaskets, flanges and bolts, forming a complex statically indeterminate system; seal contact pressure is provided by the deformation of the bolts. The contact pressure distribution when the flat gasket is working is uniform. When the medium pressure fluctuates, and the contact pressure is greater than the contact pressure, the leakage may occur.
- 19-12 16 19-12
Advantages of fluorine rubber seals: 1. The seals should have outstanding sealing function under the operating pressure and a certain temperature range, and the sealing function can be actively improved with the addition of pressure. 2. The friction between the seal equipment and the moving parts should be small, and the friction coefficient should be stable. 3. The sealing ring has strong anti-corrosion ability, not easy to age, long working life, good abrasion resistance, and can actively compensate to a certain extent after wear. 4. The structure of the fluorine rubber seal ring is simple, the use and protection of the fluorine rubber are convenient, and the fluorine rubber seal ring has good corrosion resistance, so that the seal ring has a longer life. Fluorinated rubber is a synthetic rubber rich in fluorine atoms. Fluorinated rubber has excellent functions of high temperature resistance, oil resistance and corrosion resistance to various chemicals. It is an indispensable data element for top science and technology such as aviation, sailing, aerospace, and world flight.
- 19-09 20 19-09