Ceramic fiber packing

Ceramic fiber packingIt is made of high-strength ceramic fibers as raw materials, spun and woven, and reinforced with glass fiber heat-resistant alloy wire and other materials according to different usage temperatures and conditions. The continuous use temperature is 1000 ℃, and the experimental temperature reaches 1200 ℃, with good resistance to acid and alkali corrosion, aluminum, zinc, etc.

Ceramics traditionally refers to pottery and porcelain, but also includes artificial inorganic non-metallic materials such as glass, enamel, refractory materials, bricks, cement, lime, etc. Since these materials are all produced from natural silicate minerals, ceramic materials are also silicate materials. In the past two to three decades, ancient ceramic materials have made great progress, and many new ceramic materials have compositions far beyond the range of silicates. The performance of ceramics is facing significant breakthroughs, and they are increasingly widely used in many fields of modern industry and science and technology. Nowadays, ceramic materials are actually a general term for various inorganic non-metallic materials, which, together with metals and polymer materials, have become the main pillars of modern engineering materials.

1. Classification of ceramic sealing materials

Engineering ceramic materials mainly include three categories: inorganic glass, glass ceramics, and ceramics. There are many types of ceramics, and according to convention, ceramics are generally divided into three categories: traditional ceramics, special ceramics, and metal ceramics.

(1) Traditional ceramics

Traditional ceramics, also known as ordinary ceramics, mainly refer to clay products. According to their performance characteristics and applications, they can be divided into daily-use ceramics, architectural ceramics, electrical insulation ceramics, chemical ceramics, and porous ceramics.

(2) Special ceramics

Special ceramics are ceramics with various special mechanical, physical, or chemical properties. According to their performance characteristics and applications, they are divided into high-temperature ceramics, magnetic ceramics, piezoelectric ceramics, electro-optic ceramics, and capacitor ceramics.

(3) Metal ceramics

The production method of powder metallurgy includes three major processes: powder milling, forming, and sintering, similar to the production method of ceramics. Therefore, metal materials produced by powder metallurgy are often collectively referred to as metal ceramics. The classification of metal ceramics is the same as that of steel. The commonly referred to metal ceramics refer to the portion of metal ceramics that are based on oxides and non oxides, with metals as binders, and have composition and performance characteristics similar to ceramics.

Ceramics, as sealing materials, mainly refer to special ceramics and metal ceramics, which are widely used in sealing. Of particular importance are high-temperature ceramics, which have two main chemical compositions: one is oxide ceramics such as AI2O3, BeO, Cr2O3, etc., and the other is non oxide ceramics such as carbides, borides, nitrides, and silicides.

2. Main characteristics of ceramic sealing materials

(1) High stiffness

The stiffness is measured by the elastic modulus, which reflects the strength of the bonding bond. Therefore, ceramics with strong chemical bonds have a high elastic modulus, which is several times higher than metals and 2-4 orders of magnitude higher than polymer materials. The elastic moduli of several typical ceramics are shown in Table 1.

The elastic modulus is not sensitive to tissue, including grain size and crystal morphology, but is greatly affected by porosity. Pores will reduce the elastic modulus of the material.

(2) High hardness

The hardness and stiffness of materials are determined by the strength of chemical bonds, so ceramics have a hardness of 500-800HV among various materials, and high polymer materials have a hardness not exceeding 20HV,

Hebei Saiao Sealing Factory produces and exports various fluid sealing materials and products, mainly including sealing gaskets, PTFE products, and fire-resistant materials. For example, gasket products include graphite gaskets, aramid gaskets, carbon fiber gaskets, high water-based gaskets, and various gasket rings. Tetrafluoroethylene products include PTFE sheets, PTFE gaskets, PTFE rods, PTFE gaskets, etc. Fire resistant sealing products include fireproof cloth, fireproof canvas, silicone tape, fire blankets, fireproof blankets, insulation blankets, and various steam pipeline insulation sleeves. consulting service

Flexible graphite filler is a pure graphite product made from natural flake like high carbon graphite, processed and refined through special chemical and physical treatments. In addition to maintaining the excellent properties of natural flake graphite intact, it mainly possesses excellent characteristics such as softness, resilience, corrosion resistance, high pressure resistance, radiation resistance, and thermal conductivity. Its material is woven from low sulfur expanded graphite wire,Reinforced with cotton yarn lining. Has an extremely low coefficient of friction,Will not wear down the pump shaft and valve stem,And it has good thermal conductivity,Chemical corrosion resistance and high resilience.

Flexible graphite packing is made by processing and weaving flexible graphite composite coils. Mainly used for static and dynamic sealing at valve, pump, and pipeline connections. This product has a wide range of applicability, including high temperature resistance, strong acid and alkali resistance, high temperature resistance, long service life, self-lubricating, and bottom friction coefficient. It is particularly suitable for use in harsh medium conditions. Widely used in hydrogenation units under harsh working conditions such as hot water, steam, oil, high temperature, and high pressure.

Using aramid fibers and plant fibers as the matrix, impregnated with imported formulations and subjected to high permeability strengthening treatment; Constructed using square cross internal locking technology. The special weaving form makes up for the shortcomings of aramid, while improving the anti erosion and water swelling properties of high water-based materials, resulting in better performance.

※ Product features:

High strength, low friction, wear resistance, erosion resistance, and expansion when in contact with water;

The product is suitable for:

◎ Industries: Petroleum, pharmaceuticals, food, sugar manufacturing, papermaking, coal mining, shipbuilding, and power industries, etc.

Scope: Dynamic sealing parts that operate at high speeds, such as organic solvents, water, and grinding media.

◎ Media: water, steam, organic solvents, oils, weak acids, weak bases, grinding media, etc.

Product specifications: 3 * 3mm-50 * 50mm; Special specifications or various non-standard products can be customized according to customer requirements

※ Technical indicators:

Graphite coated asbestos packing

High quality asbestos packing is coated with graphite inside and outside and fully immersed in oil, with good rebound and lubrication, making it a universal packing,

Mainly used as dynamic seals, packing for pumps and valves (especially suitable for boiler feed pumps). Suitable for media such as alkaline solutions, viscous liquids, water, steam, gases, hot water, and salts.

PTFE impregnated asbestos packing

The white asbestos long fiber is fully immersed in tetrafluoro lotion to improve corrosion resistance and wear resistance, and the sealing performance of tetrafluoro is stronger after thermal expansion. Long service life.

Can be used for various dynamic and static seals, especially suitable for high-speed pumps under moderate pressure. Suitable for media such as alkaline solutions, viscous liquids, water, steam, gases, hot water, and salts.

Oil containing PTFE asbestos packing

Woven with asbestos thread soaked in PTFE, surface treated with PTFE solution and special lubricant silicone oil, used on stainless steel or chrome plated shafts without corroding them, and in high peripheral velocity environments.

Can be applied to various liquids such as alkali, dilute inorganic acids, water, steam, organic acids, oils, alcohols, etc. And it is suitable for paper mills, dye factories, food factories, pharmaceutical factories, etc.

Dust free asbestos packing

Made of square woven asbestos thread, used as insulation material for various thermal equipment and heat conduction systems. Dry spun asbestos packing with metal wire (copper wire, nickel wire, or stainless steel wire) can also be produced according to the requirements of the working conditions.

Performance of graphite coated ceramic packingFeatures:

It can be continuously used at a temperature of 1000 ℃, with an experimental temperature of 1200 ℃. It has good resistance to acid and alkali corrosion, aluminum, zinc, etc., high temperature strength and insulation performance with the ability to corrode molten metals.

Technical Specifications:

Scope of application：

Sealing equipment suitable for high temperature and high pressure machines, pumps, and valves; Insulation of high-temperature pipelines and containers; Sealing of coking furnace; Sealing of industrial kiln doors; Metal processing, boiler doors, high-temperature furnace doors, high-temperature and high-pressure machinery, pumps, and valves industries. It can be widely used in chemical, power, paper making, food, pharmaceutical and other industrial media: clean fluid or pulp, brine, lotion, grease, hydrocarbons, solvents, pulp.

Specifications：

6mm-50mmSpecial specifications or various non-standard products can be customized according to customer requirements.

Saio Sealing Factory is a professional manufacturerCeramic fiber packingmanufacturer，priceDiscounts, sold by the manufacturer at a reasonable price.

It is not easy to choose a product with good quality and low price on the Internet. The Internet is full of merchants who claim that their quality is good. However, due to distance and time, customers cannot see the product in person, so it gives merchants an opportunity to take advantage of it. The product names are all called. However, even the same product can have different quality levels. It is a common practice for some illegal merchants to pass the inferior product off as the superior one, thus obtaining greater profits. But it's like buying and selling with a hammer, and customers are not easy to deceive. When customers discover problems, it's like smashing their own brand, and the road will only become narrower and narrower. Hualing Sealing has always been steadfast in its corporate philosophy, delivering products to customers without sacrificing quality for short-term gains. This is also a prerequisite for gaining customer trust. Saio Sealing will definitely sail with honesty and trustworthiness to ride the waves in the online torrent!

Since its establishment, Saio Sealing Factory has been highly praised. Firstly, our factory is a professional manufacturer of sealing products. We have a cooperative team dedicated to the production and research of related sealing products, and our professional technology and level strictly control the quality of all products. Therefore, our products have received high praise after being purchased and used by a large number of customers. Secondly, our factory produces a wide variety of products with complete models. No matter what kind of product you need, you can find it at Saio. Our products are of good quality and affordable, genuine and genuine. We will never maliciously raise product prices for personal gain, our prices are reasonable and reasonable. If you are not confident about our products, you can compare prices from three different sources. I believe we are your next choice. Afterwards, our sincere service attitude and thoughtful service have also received high praise from many buyers. We will never say any impolite words to you, and we will move you with our thoughtful service process. Our factory adopts a "door-to-door" service process to safeguard your products. You only need to easily receive them from your "door". Regarding logistics issues, we will solve them throughout the process and do our best to find a reliable and reasonably priced logistics company for you, so that the products can be delivered to you intact and undamaged.

The sealing material should meet the requirements of sealing function. Due to the different sealed media and working conditions of the equipment, it is required that the sealing material has different applicability. The requirements for sealing materials are:

① The material has good density and is not easy to leak the medium; If the density is loose, it is easy to leak the medium.

② Having appropriate mechanical strength and hardness; When selecting a product, it is important to fully understand the mechanical strength and hardness that the product is suitable for.

③ Good compressibility and resilience, with minimal deformation;

④ Not softening or decomposing at high temperatures, not hardening or brittle cracking at low temperatures;

⑤ Good corrosion resistance, able to work in media such as acid, alkali, and oil, with small changes in volume and hardness, and does not adhere to metal surfaces;

⑥ Low friction coefficient and good wear resistance;

⑦ Has the flexibility to fully adhere to the sealing surface;

⑧ Good aging resistance and durability.

The above is the performance requirements of sealing materials shared with you by Saio, hoping that it can help customers choose ideal and good products. If you need our help, please consult us in a timely manner, and we will be waiting for your call at any time.

Saio shares with you several misconceptions about repairing mechanical seals:

1The greater the compression of the tension spring, the better the sealing effect. In fact, if the tension of the spring is too large, it can cause rapid wear of the friction pair and burn out in an instant; Excessive tightening causes the tension spring to lose its ability to regulate the end face of the dynamic ring, resulting in seal failure.

2The tighter the sealing diagram of the moving ring, the better. Actually, tightening the dynamic ring seal is harmful and not beneficial. One is to increase the wear and leakage of the sealing ring and shaft sleeve; Secondly, it increases the resistance to axial adjustment and movement of the moving ring, making it difficult to make timely adjustments when working conditions change frequently; Thirdly, excessive fatigue of the tension spring can easily damage it; The fourth is to deform the sealing ring of the moving ring, which affects the sealing effect.

3The tighter the static ring seal, the better. The static ring seal is completely in a stopped state, and a relatively tight seal will have better sealing effect, but being too tight is also harmful. One is that it causes excessive deformation of the static ring seal, which affects the sealing effect; The second reason is that the static ring material is mostly graphite, which is generally brittle and can easily break under excessive stress; Thirdly, the installation and disassembly are difficult, and it is easy to damage the static ring.

4The tighter the impeller lock nut, the better. Leakage between the shaft sleeve and the shaft (inter shaft leakage) is quite common in mechanical seal sealing. It is generally believed that inter shaft leakage is caused by the impeller lock nut not being tightened. However, there are many factors that can lead to inter shaft leakage, such as the failure and displacement of the inter shaft gasket, impurities in the inter shaft, significant positional errors at the joint between the shaft and the shaft sleeve, damage to the touch surface, gaps between various components on the shaft, and excessively long screw threads on the shaft head, all of which can cause inter shaft leakage. Excessive locking of the locking nut will only cause premature failure of the shaft pad. On the contrary, moderately locking the locking nut will maintain a certain degree of tightness and elasticity of the shaft pad. During operation, the locking nut will actively lock, keeping the shaft pad in a protruding sealing state.

5The new is better than the old. Relatively speaking, using new mechanical seals for sealing is better than using old ones, but the quality or material selection of new mechanical seals for sealing is not timely, and errors in cooperation scale can greatly affect the sealing effect; In polymeric and permeable media, it is still better not to replace the static ring if there is no excessive wear. Because the stationary ring is in a stopped state for a long time in the stationary ring seat, the polymer and impurities are deposited together, which has a good sealing effect.

Flexible graphite material (graphite ring)

Scope of application: Various corrosive chemical liquids, strong bases, hydrochloric acid, sulfuric acid and other highly corrosive liquids, organic solvents, liquid oxygen, etc. Sealing of flanges, valves, reactors, and pumps used in industries such as petroleum, chemical, synthetic fiber, coal mining, power generation, and metallurgy.
Features: The ring can add metal wires and platinum metal according to user requirements.
Technical parameters: Temperature:-100℃~+800℃
Stress35MPa
Chemical resistance:PHvalue0-14