Hydraulic seals introduction of some species

Hydraulic cylinder seals are used in hydraulic rod seals, piston seals, dust seals, rotary seals, guide rings, retaining rings, O rings, which are combinations of seals, lip seals and O-rings.
Hydraulic Seals - Seals combination
Lancaster closure: Manchester seal ring similar to the structure and format, but also by a rubber O-ring with PTFE special quality seal rectangular or trapezoidal shape composed, Lancaster closure with the same cell to circle can divided into the hole and shaft seal Lancaster Lancaster letters, Lancaster closure and sealing of the cable sealing mechanism and cell to circle the same, but with only one-way Manchester seal sealing effect. Lancaster closure and common features of cell to circle filled PTFE material quality, low friction, no stick-slip, long life.
Grid to circle: grid to circle by rubber O-ring with PTFE seal superimposed square qualitative composition used, the cell to circle can be divided into hole grid to ring and shaft cell to ring, but Their sealing  barrier seals mechanism is the same, the deformation of the sealing according to their own high initial surface contact stress, preventing leakage of the liquid without pressure. Working cylinder, the pressure oil to the elastic deformation of the O-ring seal extrusion square, so close to the sealing surface, and together with the initial contact stress to prevent the pressure oil from leaking.
Lei ring: bud-rings are made of a synthetic rubbery O-ring of rubber-cloth and a Y-shaped ring composed of the superposition, on its own deformation of the sealing surface of high initial contact stress, prevents stress- leakage of liquid. Working cylinder, the pressure oil to the elastic deformation of the O-ring, has squeezed and stretched Y-ring sealing lip, so close to the sealing surface, and together with the initial contact stress to prevent leakage of pressure oil .

Way to achieve zero leakage seals

Pros and cons of two-way seal can withstand radial loads and ensure bi-directional sealing performance. The security seal is mainly used for fluid delivery systems, including a variety of medical and dental equipment. With 60 years experience in the production of seals Minnesota Rubber provides bidirectional seal custom design.
In order to achieve zero leakage, Minnesota designed a special rubber lip seals, the sealing lip on one side exposed to the pressure in the positive direction, the other side in the opposite direction to withstand stress. Under pressure, the sealing lip of the seal to close the sealing surface and ensure that the liquid does not leak.
Excellent design, the correct choice of materials and precision manufacturing process for these lip seals deliver the best performance. For medical applications, Minnesota Rubber will choose special material, to ensure the final product low extractables, with most intravenous (IV) fluid system compatibility.
Lip seal size is also an important factor in sealing applications. The sealing member can be reduced smaller possibility of leakage. Minnesota Rubber can design and manufacture a variety of small size plastic seals. For example figure parts, maximum diameter of 0.346 inches (8.788mm), an inner diameter of 0.140 inches (3.556mm), a height of 0.145 inches (3.683mm). Tolerance control: ID + / -0.004 inch (0.102mm), sealing surface diameter + / -0.005 inch (0.127mm), seal height + / -0.005 inches (0.127mm).

2012 liquid-gas seal products demand statistical prediction analysis

At present, China's agriculture, water conservancy, energy, transportation, information, construction, environmental protection and other industries developed rapidly, which requires a lot of machinery and equipment to meet their development needs. With the industrialization and automation level, the equipment needs to support a large number of high performance and high reliability of hydraulic pneumatic and sealing components. Preliminary estimates, is expected to 2012 domestic hydraulic, hydraulic, pneumatic and sealing products total demand of 20 billion yuan by 2005 (of which approximately $ 900 million of imports and exports nearly $ 300 million) to about 37 billion yuan (including Approximately $ 1.5 billion of imports, exports about 500 million U.S. dollars). Among them, hydraulic products from 100 billion to 200 billion yuan, hydraulic products from more than 10 billion to $ 20 billion, pneumatic products from nearly 30 billion to 50 billion yuan, sealing products from more than 30 billion to $ 10 billion.
Agricultural Machinery
According to the expected large and medium horsepower tractors to 2012 the annual demand of about 100,000 units, combine harvesters to 50,000 units, additional types of agricultural machinery has also increased the amount projected to 2012, medium and large horsepower tractors have amounted to about 1.3 million units, combines about 40 million units. According to the 2003 industry sales whereabouts statistics, hydraulic products for the agricultural oem supporting hydraulic sales accounted for 4.9% of total (retail portion is not included in the statistics). Therefore, for the agricultural facilities, maintenance of hydraulic and pneumatic seals, the market demand will be of great growth.
Agricultural products requires a lot of gear pumps, piston pumps, multi-way valve, cylinder and so on.
Construction Machinery
Construction Machinery is the largest user of hydraulic products, accounting for 42.3% of industry sales, the proportion will increase in the future, so construction machinery developments is essential. It is expected that by 2012, demand for hydraulic excavators approximately 60,000 to 80,000 units, bulldozers (120 horsepower) ten thousand units, loaders about 100,000 to 12 million units, about 2,000 units graders, rollers about 1.5 million units, about 20,000 units of cranes, forklifts about 80,000 units, cement mixer ten thousand units. In addition, China now has about 140 million units of construction machinery is expected to 20,112 years to reach 200 million units. In another development, annual domestic production of excavators, road machinery, cement mixer, and assorted imported hydraulic parts, about $ 150 million or more. In short, for engineering machinery, maintenance of hydraulic and Security seals the market will face a new period of great development.
These products require a large number of high-performance engineering machinery, long-life high-pressure piston pump, high pressure gear pumps, high torque motors, wheel motor, multi-valve, fuel tank, steering gear and so on.
Metallurgical and mining equipment
It is understood, metallurgical equipment hydraulic and pneumatic technology utilization rate reached 6.1% ~ 8.1%, accounting for about 10% of the total cost of equipment around. Statistical analysis from the industry, hydraulic, pneumatic products provide direct support for the metallurgical industry sales accounted for 14.5% and 9% (excluding retail portion). It is reported that annual imports of metallurgical industry for the maintenance of hydraulic, pneumatic and sealing products to tens of millions of dollars. Therefore, for the metallurgical, mining equipment supporting host and repair of hydraulic and pneumatic marker cable ties demand will have grown significantly.
Metallurgical and mining equipment will require significant piston pump, cartridge valves, solenoid valves, proportional valves, servo valves, cylinders, complete sets of hydraulic systems, pneumatic components and a large number of seals.

Hydraulic oil (liquid) on the performance of the seal

Seal theory: in a dynamic and flexible seal between mating surfaces a layer of lubricating film intact. In the normal state, the lubricating film is the use of this layer to achieve the purpose of sealing and extending seal life.
In the hydraulic system, the hydraulic oil (fluid) of the sealing performance of the sealing member in addition to media / sealing material compatibility, viscosity of the oil, the viscosity change with temperature, reciprocating (rotational) movement velocity, pressure, and the shaft, cylinder or the rod of material, hardness, geometry, surface finish, and the impact of the seal structure of the lubricating film and the film forming characteristics of the factors that affect the sealing effect. In general, to form a continuous lubricating film can achieve the desired sealing effect.
When moving speed is too high, the impact of a continuous lubricating film formation, resulting in frictional heat increases the temperature range beyond the seal material is caused by damage to the seal. Pressure is too large, in addition to affecting film formation, but also on the rubber seals have a "squeeze gap" effect, generally can be added, "ring" to improve. Or select a low coefficient of friction, good self-lubricating PTFE vehicle seals portfolio structure will help to improve the lubrication between the friction, suitable for high speed and high pressure systems reciprocating cylinder piston, the piston rod seal.
Depending on the system environment, working conditions and a reasonable selection of media seals and sealing materials, proper installation and maintenance of seals, is to obtain effective sealing effect, reliability and service life of the key.
Japan was first in the world with the latest image processing technology to explain the oil seal sealing principle. That the seal (rotating dynamic seal) sealing machine, and sealing principle reason lubrication characteristics of two parts. Lubrication: oil seal friction characteristics are affected by the viscosity of the fluid and the sliding speed control, the relative sliding of the shaft security seals surfaces separated lubrication oil film of moving, so keeping friction, wear small. Sealing principle: the sliding contact surface of the seal oil flow from the atmosphere side to the oil side and from the oil side to the atmosphere side of the loop. The sliding surface lubrication, prevent wear and tear, thus there is no leakage.

The mechanical seal ring and stationary ring grinding

1) Remove the snap ring, after grinding, rough first study, after lapping, conditions can be polished.
2) coarse grinding, the choice of 80 ~ 160 # grit abrasive,wire seal first rubbed machining marks. These can then be abrasive grinding 160 #, so finish to meet the design requirements. Carbide or ceramic ring is required after grinding machine polishing with a polishing. The intensity of polishing machine can be used M28 ~ M5 boron carbide. Polished to a mirror. Ceramic ring available after the M5 agate powder grinding, polishing with chromium oxide.
3) graphite-filled PTFE stationary ring, because the soft material, can be used kerosene, gasoline or water lapping, trailer seals without adding abrasives. In the running-in process can also self-development, so finish requirements are not too high.
4) milling method, and a grinding machine can grind the grinding machine, grinding machine can not on the use of glass-eight manual polishing method.

Rubber seals manufacturing enterprises should focus on brand awareness

Rapid economic development has brought the automotive industry, and other machinery and other major downstream industries increased investment in fixed assets, the domestic market demand for security seals manufacturing industry provides huge market space.
Rubber seals may be small, but in national economic development plays an important role in national defense, chemical, petroleum, coal, transportation and machinery manufacturing and other industries based parts and accessories. In recent years, with the rapid economic growth, rubber seals manufacturing industry has maintained double-digit growth.
According to statistics, China's rubber pull tight seals manufacturing enterprises above designated size (diameter according to the National Bureau of Statistics, the sales income of 500 million yuan) realized an industrial output value of nearly 80 billion yuan, an increase of more than 25%.

Spiral wound gasket with inner and outer applicable standards

Spiral wound gasket with inner and outer applicable standards:
(1) We provide metal spiral wound gasket finished products while also providing the aura of metal seal with inner ring and outer ring;
2 stainless steel outer and inner ring are used disposable punch stamping;
(3) We offer aura without any treatment, or according to your requirements galvanized or spray

Spiral wound gasket with inner and outer Applications:
1 for the manufacture of a variety of spiral wound gasket,
(2) According to different requirements. Aura using stamping,barrier security seals cutting. Disc ring, etc. manufacture,
3 slots available to pull the aura of products or chamfer

Silicone sealant five selected features

Requires sealant has a low modulus, high displacement capability, better with wood properties, freely scalable, best to use 50LM (50 low modulus magnitude) silicone sealant. The displacement capacity of plus or minus 50%. Skylights with plastic also requires transparency is good, nice, especially in high-rise and high-rise curtain wall, Oita panes of glass curtain wall, using laminated insulating glass curtain wall, seismic fortification area 9 degrees on the wall, even in these types of situations combination, but also need to use high-performance structural silicone sealant. Silicone sealant tensile strength and elongation at break are high, with the same bonding width can withstand greater loads.

Most silicone sealants are named according to the site of application, when used also by the selection of the appropriate parts of silicone sealant.

1, building curtain panel seams. Building walls between the panel and the panel joints need glue to fill, then you should use silicone weather sealant. It needs to withstand the wind load, dynamic load, the deformation of the substrate caused by thermal expansion and contraction displacement, while in the case of tension or compression, adhesion will not be destroyed, but also has good elastic recovery rate, the displacement of the panel disappears, it can return to its original state. Refer to the standard "glass curtain wall joint sealants."

2, light top position. Skylights due to their own weight load, snow load, wind load, asymmetric load and deflection caused by thermal expansion material large and complex, not only horizontal displacement, and shear displacement. Particularly the use of a polycarbonate plate, due to its high coefficient of thermal expansion and contraction, the glass 67 times.
3, structural silicone sealant assembly parts. And its supporting structure in the curtain wall panel sealant used between the need to withstand a variety of loads, and to ensure long-term adhesion, not fall off, you must meet national mandatory standards "structural silicone sealant" (GB16776) requirements .
4, the area between the doors and windows. Colored aluminum windows and doors aluminum and glass to use the gap between room temperature curable sealant fill. Fully cured, integrally formed between the glass and aluminum.
5, stone panel area. Stone panel components must be used exclusively stone silicone sealant. Because the stone itself is a porous material, susceptible to contamination, and contamination is difficult to remove. General sealants containing plasticizers and other non-reactive low molecular weight substances, internal migration from the gum to the stone house, the stone surface of the oil and dust, causing the stone pollution. This adhesive is divided into two categories. First stone sealing glue for security seals caulk between the stone plates.

The second is hanging stone with plastic, stone and metal hook for the bond between. Past used stone hanging rigid class epoxy glue, building vibration, they will pass the stress stone panel, stone easily be shattered. In the past with polyacrylates, neoprene, polyurethane filling, adhesive or easily damaged by external force, or harmful volatile gases. Silicone sealant no such ills, can play a long tamper seals, waterproof effect.

How to distinguish between true and false doors and windows sealed

With a variety of petrochemical products prices continue to rise, some irresponsible manufacturers began aspects of unfair competition from the raw material (the so-called shoddy, shoddy).
Actual key is sealed windows and doors, sealing quality seal plays an important role. The seal material used market generally for modifying PVC, soft PVC in a key role in its inside adding a plasticizer which is nothing more than the quality, the relatively stable plasticizers are dioctyl phthalate butter, two small fat. But now the market price is high, some unscrupulous traders are using some other cheap stuff instead of (waste oil, oil refineries remaining foundation, etc.) to consumers is a big risk.
Its products symptoms:
1 show surface permeability precipitation phenomena, those fundamental and PVC waste oil is not compatible solution, seal surface is prone to grease the surface of the profile also infected with yellow marks. Do not even have a lot of environmental volatile substances, air pollution.
(2) When the so-called volatile or plasticizer exudation after the high security bolt seals will lose its original softness, becomes hard, and soon aging of contraction, so that a part of the closed doors there was a great gap, sealed resistance becomes poor (leakage, leakage of dust) in particular, steel doors and windows will soon be inside the steel liner corrosion, there are many users often find in the rainy season from inside the window out of a lot of layering parts dirty red liquid that is leaking steel doors and windows premature corrosion lining, doors and windows of life will be greatly reduced.
In the production process, the sealing strip investment accounted for a small proportion, but its role has not be ignored. So we do a little bit in order to reduce the cost then the choice of those little fake counterfeit products, the identification method is very simple.
One, with the smell whether there is odor, normal PVC material will be a little son alcohol taste, smell almost minimal.
Second, try to seal tightly wrapped around the profile, and a period of time at a high temperature (on the roof or sunny places). See profile surface and seal contact surfaces if there is defaced discoloration of the surface of the dust seal is yellow (with oil is very easy to suck soil) permeability, whether left the dirty hands.
Third, some of the cheaper prices will be a lot of filler seal, so the surface will not be very bright, those very cheap look very bright undesirable. Fourth, look at the proportion of how much energy per kilogram of rice. There are many unscrupulous traders, large areas in the use of fillers tricks, some manufacturers for the pursuit of greater yields, (save a little electricity) using talcum powder, TSP do things like fillers, greatly increasing the proportion of metal cable ties products , so that virtually but increased costs outweigh the benefits. Add TSP seal, you hand stretch the back and forth several times, the surface will be a small amount of a white powder.

Car glass sealing strip is sandwiched self solution

I'll give you a simple solution, I have successfully solved the problem, the fact that it is feasible, you may wish to try:
1: First the glass security seal in the case does not clip shut, a person fix on two individuals to cope with it, the simplest way is to use the card, or we carry identity cards, driving license and so hard on the line card in off the glass when the attention to the position of the clip seal Xiecha card into it, when the glass is completely closed after pull out the card, so the seal will not get stuck,
2: then use the hair dryer to soften the hot air to barrier seals  he folds flat with your fingers, of course, a relatively long clip was a bit longer and let the seal natural cooling, generally not very serious one can solve the problem anymore more time to do more than once repeated folds can also solve the problem, we go and try it!

Car sealing strip composition and application

There is a very important car body sealing member is made of a synthetic rubber seal, also known as protective molding gibs. Mainly used in door frames, side windows, front and rear windshield, hood and trunk lid, make the seal, the other also played vibration protection.
Production of sealing material is mainly polyvinyl chloride (PVC), ethylene propylene rubber (EPDM), synthetic rubber-modified polypropylene (PP-EPDM), etc., By extrusion molding or injection molding method is made.
Compartment door plastic seals mainly refers to the door frame and the door seal head and said seal. Door seal by definition is mounted on the door frame seal. Door seal not only to ensure tightness, but also bear the impact force when closed, hence it must be flexible, but also toughness, mainly by the dense gel matrix and sponge rubber foam tube composed of two parts. Dense gel containing metal skeleton, serve to strengthen the stereotypical strip and fixation. Sponge rubber foam tube is soft and elastic, plays compression deformation , pressure relief bounce function. In addition, some seal lip portion constituted by the color or affixed with glue fabric, color and beautiful decorative effect.
Door head and said seal structure, there are two, one for the whole sponge rubber foam tube, and another by a dense rubber and sponge rubber matrix composition. This seal glue or embedded in the door, and the door seal with, in order to increase the door and the body of the seal security  Door seal head and said not every car are used, such as some economy cars would not, mainly from cost savings considerations.
Bonnet sealing strip made of pure foam sponge rubber sponge rubber foam tube or pipe and compacting plastic composite structure for the engine cover with the front section of the seal. Trunk lid or rear door seal by a dense skeleton containing gum base and sponge rubber foam tubes that can withstand a certain impact, ensure that the back cover is closed seal.
There are front and rear window seal of windshield seals, glass run channel and window seals inside and outside bar.

PVC seal identification method

In the process of making wooden doors, indicative seals the investment accounted for a small proportion, but its role has not be ignored. So I think we should not cost so little choice in order to reduce those little fake counterfeit products on the market today, I simply used on the PVC market situation briefly to do something, the other specifically explain inferior PVC seal and advanced silicon rubber sealing of the identification method.
Doors basic function is thermal insulation, sound insulation, wind and dust, the actual key to seal, seal quality seal plays an important role. Market with a sealing strip material is generally of PVC, soft PVC in its key role in its inside is nothing more than adding plasticizers good or bad, there are currently more stable plasticizer dioctyl phthalate resin, two Ding fat. But now the market price is high, some unscrupulous traders are using some other cheap stuff instead of (waste oil, oil refineries remaining foundation, etc.) to consumers is a big risk. With a variety of petrochemical products prices continue to rise, some irresponsible manufacturers began aspects of unfair competition from the raw material (the so-called shoddy, shoddy). These affordable, even as low as 2-3 cents per meter meter seal doors of factories became irresponsible choice because they are a few hundred dollars doors almost no cost, resulting in a decrease in quality doors, l brought many hidden dangers (air leakage, no dust, no noise increases the heating and air conditioning costs), more harm than good, it is worth considering.

Door seal system development trend

With the appearance of the body and sealing performance requirements are high, and the sealing strip manufacturing process and die level, body sealing systems presents some new design trends.

1 do for parting doors sealed, not only can reduce wind noise and can achieve a better appearance.
2 seal increasingly high degree of integration, there are many designs to triangular windows, triangular window guide rail and glass sealing strip made of one, some even outside the window sill seal cable tie wraps also integrate them to form a part, thus reducing the generating a plurality of one-piece matching the size of the deviation, to improve the efficiency of assembly, and better appearance.
3 Energy saving and environmental requirements of the sealing strip will be more emphasis on the design, the conventional high security seal materials used in the vulcanized rubber is not conducive to recycling waste, a new material TPE / TPV sealing sectors are to be applied to promote easy achieve recycling, and its density is smaller than rubber, can reduce the weight of the sealing strip.

Container seal sealing solutions to the wrong number which

There are a lot of people when using container seal container seal sometimes accidentally gave the wrong number, usually container (seal) the number of seals are acceptance or declaration to the mistake, look here first universal container seal numbers: the first part composed by the four letters of the alphabet.
Top three code (Owner Code) Main Description box owner, operator, and the fourth digit code description container types. Out as CBHU standard container is to indicate the beginning of container owners and operators artificially COSCON. The second part consists of six digits. Yes Cabinet License (Registration Code), for a unique identifier for the container box holder. The third part is the checksum (Check Digit) from the previous four letters and six numbers obtained after calibration regular expressions used to identify whether the parity error occurred. Ie 11 digits.
container seals number is from these three components, the general error usually occurs when the container seal numbers are the first part wrong, if you are not starting containerized cargo, then you can immediately change a container seal, so relatively simple. (Recommended View: container seals)
If the container is taken away, only to find container seal numbers are wrong, then they would have to spend money to change what is good, ranging from around $ 200 to change a single charge. If I run across the port of destination customs inspection, the actual luggage seals number on the bill of lading sorry now come from the original may be converted to a thorough examination of the general inspection, such costs will be much higher, is quite troublesome.
Another way is to say that you and the consignee of the container seal numbers this error to him and told him to follow now pick up the wrong container seal numbers can be friends, but it should fit the consignee.

Pull the black plastic seals security seals

Gone are the days of April, floral Him, you smell or no smell, and it is this that is, there is no far away. April wind stick just love Him, you see or do not see, he is being this, there is no flash no hide. -
April container seals worries cloud set Him, you know or do not understand, is that he is, there is no open no take. -
Dip a high-security seal Zhu night female, being arbitrary allergies, azure Wan outside or thin cloth clouds, distant only a class of color, Gu did not clear before the round of speaking, Qinger ear, as long as the black color of the wind filling Qian eardrum, Tiantie battle with death and some people Hite cumbersome and numb. -
These flowers female Kai, but also a season when Jane Wing. Colorful color wipe Him the whole world. But there actually was hidden by the petals of the heart is not being Yan, carried by the wind dust suppression. Jane all its glory just being inside and outside wiped the fat heavy color, into the so-called effects and features, just fight people feared dead. Confusion, pick up lost, fear ... this is the characteristic of this world body. You see or do not see, is being, or is not being, it is this that is outside, waiting for you to open the waist, waiting for your extension service, waiting for you to put a stream, waiting for your forgotten.  security seals
Is less vegetation to renew crazy, people poured Zhu Gu see the world, so the initiation phase suspect suspect oath Xixi dream thinking and died. But the body of the wearer but did not put off that it is not simply lose fat is really in honor and take the looming bloody truth, houndstooth pattern woven speak then think again a main contention dream out of round pick negative, there are flashing neon Act Gu Qing circumcenter far round, like a remote desert island resting the body, there is little regulation to hide the vast sea, go to the next as long as confusion, while the so-called be tolerant to diversity, people are more willing to be a kind of suspicion of a law ending speech. -
School is a danger forever worry in the world, but as long as people are seeking outside this speed worries, seeking of care. Dreaming is also good, are classified worth mentioning, just have a guilty conscience. -
Spend half a month's time to put the wearer stream, speak relax its self-proclaimed extraordinary is really just an excuse heart skipping is the real reason. Very next death, put into the process stream are solitary negative lasting Love. Gu Qing speaking society is arrogant speech but at least the lines of a good society and schools vary. Bitter willing to plot the death of the coffers squandered, the original plan did not go missing without end. The pull for Him is due, but also speed worry. With high security seal for their own sweat and clear for tomorrow and see the sky, and this becomes a harvest. . Put half of the stream, after all, went to the original surface. A body of the wearer, a group of time, really really like the hustle and bustle rare. Gu Qing Xu less can really seal in the circumstances, there is no influence by the gorgeous dress. A group walk ended, a group tightly, a dead body care street view, then shocked the first time being the heart tail together, speak for themselves. Original country as yourself what is going to go. Does not cover everything into being wishful are this season's best in China. Plastic seal