To seal definitely use regulations, what are the regulations of the state

To seal definitely use regulations, what are the regulations of the state

Brief introduction of the use of seal clear regulations provisions of the state

Seal has been used widely in our country for more than 30 years, countries are also to seal the products have clear rules of use:

1. Statistical once a month, this month will be the number of seal number, scrap car use, recycling old accory seal for containers number summary;

2. Use process will lead seal is damaged, need to reissue, damaged seal must be kept to old change new. Recorded in the damage of seal no.;

3. Keep seal, vehicle cargo seal pliers, issuing, recycling work, establish full-time accounting and personnel management;

4. Seal used in various types of tank cover, box, about measurement and special circumstances, such as special site seal;

5. Seal the consumer must have brought the seal properly kept, shall not be arbitrarily lend out, transfer, replication, forge;

6. Loading researchers reporting in the list according to the actual situation of the fill in the seal number and serial number.

Describes the role of container seals

Describes the role of container seals
1 , seal the classification
( 1 ) imposed by the seal can be divided into : factory sealed ( factory seal is export factories added) ; shut ( seals , namely customs seals, Customs added ) ; vessel closure ( shipping company seal , is the ship companies added ) ; temporary closure of the pier ( Pier temporary seal is Pier added).
( 2) seal materials and functions can be divided into : high security seal , digital Accory security seals , bolt seals , metal seals , plastic wire , plastic seals , security seals , common seal.
2 , when a temporary seal plus dock
( 1 ) When unloading accidentally ruining the fixed length plastic strap seal on the back door of the cabinet ;
( 2 ) within the cabinet after unloading pier demolition cabinets, put away when the first shipment to the consignee.
3, the operation of the program
(I) Zhongshan (Feeder) - Yantian (mlther vessel) - overseas that sub- salt Zhongshan barge to the ship , the ship then each cabinet in Zhongshan in Yantian transit declaration , the tunic on the front barge following two approaches :
( 1 ) increase the boat 's rear door cabinet container seals , seal numbers virtue of the declaration ( Customs clearance without lock ) . The export factories do cabinet ( ie, installed cabinets ) is generally combined with temporary plant closures to prevent the plant from Yamaguchi to Zhongshan Port 's cabinet during the land stolen goods . Plus shipping company seal in a few cases , the starting point of the ship if the responsibility for the company's export plant DOOR (DOOR TO DOOR, DOOR TO CY down ) , it may be in the cabinet when exporting plants do .
( 2 ) the cabinet only barge company seal without customs seal , Yantian installed before the ship also need to increase the shipping company seal . Barge in Zhongshan customs clearance M / F (Manifest boat slips , manifest ) , Customs put M / F into the computer (with each cabinet Seal NO on M / F., Namely filing cabinet title ) , to local customs when Yantian customs online from the cabinet number recall , are the same.

Nylon cable ties and use new features

MC nylon is a new class of polyamide engineering plastics , due to its excellent performance, making it the status of a rapid increase in engineering plastics has become an important material for mechanical parts , increasing usage .
MC nylon properties :
( 1 ) high strength to withstand the loading time ;
( 2 ) Compared with metal , MC nylon low hardness , no damage to the grinding parts ;
( 3 ) low coefficient of friction identification cable ties, which provides a wide range of possible applications in friction ;
( 4 ) good elasticity , can bend deformation, while maintaining toughness and resistance to repeated impact ;
( 5 ) self-lubricating wear-resistant , provides superior bronze , cast iron , carbon steel and phenolic plate performance when there is no oil or ( butter oil ) lubrication applications , reduce consumption , energy saving ;
( 6 ) suction noise , vibration , MC nylon die much smaller than the metal of vibration attenuation, provides a practical way better than metal effective to prevent noise ratio
(7) MC nylon products can be made in various colors according to user needs , without compromising quality and elegant appearance ;
( 8 ) high chemical stability , alkali , alcohol, ether , hydrocarbons , acid , oil , detergent , water ( sea water ) , and has odorless, non-toxic, tasteless , non- rust characteristics, its extensive used in alkali corrosion , environmental health , food ,stainless steel wire ties textile machinery spare parts , etc., provide excellent conditions for use ;
(9) MC nylon limit can not be used in the following environments and media :
a. temperature exceeds 120 ℃ long-term

Two door seal installation methods

Door seal is a common name for , how the industry has called , for example : bumper strip doors , strip doors silencers , soundproof doors , wooden doors self-adhesive seal and so on. For door seal installed , there are two : one , mosaic , which is slot -style ; 2 , self-adhesive , also called self-adhesive sealing strip or adhesive strip black cable ties. The difference between these two frames is a need to open a file online slot door installation , a direct use of double-sided adhesive tape to the door line.

1 , inlaid wooden door seal installation method : Because the width of each slot when manufacturers use a knife blade or called slotting is not the same , there are usually 4mm, 3mm, 2.5mm, 2.0mm several, use of 3mm mostly used when the optional seal must be optimistic , as installed , is directly attached to the door seal file line ahead of the opening slot good enough , we must grow about 15mm, so you can prevent the tape shortening ;

2 , self-adhesive seals, installation is relatively simple. First line of dust door clean , the double-sided adhesive tape on the back of the sealing tape removed, the tape stuck to it identification cable ties. Should the gum is not the case , easy to fall off , we recommend using a strong adhesive sealing strip of 3M .

Cold winter, the car how to better " moisturizer " mean ?

Now most of the northern region has entered the winter . People must be kept wet , the car also have to "moisture ." Face cold and dry , the most delicate parts of the car , including leather interior compartments , seats, the whole car and tire rubber seal materials , these tender parts in a dry environment easy to aging , wrinkling and even cracking, barrier security seals but just need a little aids plus your love, the problem is easily solved.

Leather interior , seat just like human skin , these leather products inside in a dry environment at once too much water loss will wrinkle even cracking. Cracks can restore people 's lips , really want to wait until the leather seats cracks may not be able to remedy it! Another problem is the treatment of these frequent contacts and body parts are not able to use oil-based protective agent - who are willing to sit in a chair beneath the greasy ass ? At this point we need to use leather conservation wax. In fact, this leather sofa in home care are also commonly used . It not only has a strong cleansing effect it clean , leather components can also keep up to one month moisturizing effect yet.

A large number of vehicles on the rubber seal is perhaps the most easily overlooked place. They shoulder a great responsibility for the vehicle waterproof, soundproof , but they are also vulnerable , prolonged exposure to air and low humidity will cause them to premature aging. Once the seal cracks on the car 's aging water, noise will have a huge impact . The same tire rubber material is also very fragile, dry environment in the long rubber material easily tire aging , and aging badly damaged once the tire wall , even if the tire tread is also deep there is no way to continue using it. Natural rubber parts for these moisturizing products also emerged , the market for sale is called " tire treasure" of the rubber material and maintenance agents , is dedicated to moisture supplies rubber components , its main function is to nourish , repair damaged rubber seal and tires ,tamper evident tapes slowing aging , and it is also in the maintenance of the same coating, when the car's four "feet" after a maintenance shiny black , you will find that your car is more than ever "handsome " was.

Rubber seal off how do

Glass installation loose rubber seal off how to do? Glass installation is not centered, glass sash gap with uneven rubber seal is not close to the glass and window frames, installation is not flat. Hand knock glass, loose sound.

The reason for this situation:

1 When installing the glass did not clear the debris inside the slot, and the slot right in the glass.

2 glass with glass notch uneven gaps, seals and glass tank exposed, protruding notch glass,indicative seals hand sealing tape can be easily pulled off.

3 in the corner of the rubber is not disconnected, not injection of glue.

Corrective measures are:

1 carefully before installing the glass to clear the debris inside the slot, such as mortar, brick dust, wood, etc., should be carefully placed on the glass, ensuring that both sides of the gap is uniform, and timely than the regular fixed to prevent collisions shift deviation notch center.

2. Rubber seal can not pull too tight, cutting length than the length of the long assembly 2O-3Omm. When installing the mosaic in place, flat surfaces, and glass notch in close contact, so that the glass surrounding the force evenly. In the corner of the rubber should be beveled off and disconnect the injection of glue at the firm.

3 When caulk sealant fixed glass, you should use rubber or rubber block and choked the glass, leaving a gap of plastic injection, plastic injection depth should not be less than 5mm, before the glue curing, the glass should be kept free from vibration.nylon cable tie Installation is not centered, glass frames with uneven gaps, not close to the glass sealing strips and window frames, installation is not flat. Hand knock glass, loose sound.

Automotive sealing Development

For a long time , the vehicle must have a seal requires three functions : connecting , sealing and decorative. With the advancement of technology, the development of the automotive industry , especially in emerging new materials , environmental protection awareness of the car , comfort , safety, aesthetics have become increasingly demanding , the previous three functions for automotive sealing requirements are constantly introduce new and improved. To meet passenger vehicle performance and grades increasing needs, are from Applied Materials seals for passenger cars , product structure and production technology and other aspects of analysis, research trends strip door seal industry

Development of a passenger seal Review

Before the 1980s , because of the limitations of science and technology level , almost all automotive seals, mostly connected only considered to meet the performance and some sealing performance, with little regard for decorative, safety and comfort. Therefore , when the seal only consider using buses connect many aspects , such as the front and rear windscreens , side windows , door seal ; structure is very simple , mostly single types of plastic , one end connected to the body , one end connected to glass ; the material is natural rubber or styrene-butadiene rubber , plastics ( mainly modified PV C) based. Although such a seal to meet the connectivity and some sealing performance, but other properties such as elasticity , waterproof, noise canceling , isolation , dust , heat , weather , ozone resistance, anti-aging , etc. are poor, let alone the aesthetics and comfort . Due to the performance limitations of the material itself , the life of the car with the seal only 3 to 5 years, can not match the life of passenger cars ; color is also relatively simple ( almost entirely of black rubber ) , not to mention decorative and beautiful of it. Doors , body , luggage compartment seal are poor, large interior noise , dust, water is also very poor. The late 1980s, with the continuous improvement of passenger grade , with a seal on the passenger 's requirements have been increased .

Two seals currently used bus status

From the 1980s to the present , the automotive parts industry, the comprehensive performance requirements increasing, of course, the seal industry has great development.

( 1 ) before sealing the product mix has changed a lot . The original single types of plastic adhesive to now two types ( ie, dense or dense rubber and sponge rubber compound ) , three composite materials ( ie dense rubber, sponge rubber and steel or nylon composite skeleton ) , four composite materials ( i.e. dense rubber, sponge rubber or nylon and steel frame , four composite flocking material ) . Natural rubber ( or styrene ) and plastic , using a synthetic rubber EPDM (EPDM).

Application ( 2 ) the development of a new material . Abandoned strength , heat resistance, weather resistance, aging resistance are poor natural rubber ( SBR or ) and plastic , using a synthetic rubber EPDM (EPDM). E PDM has excellent heat resistance, weather resistance, ozone resistance , and its main physical properties are shown in Table 1. Due to the excellent characteristics E PDM , so the recent decades of sustained growth in sales volume .

( 3 ) Production farewell pure steam autoclave curing rubber extrusion original production process, using a more advanced multi- head extrusion microwave curing production process, as well as secondary processing injection molding process .

 Obviously, the primary seal is the most basic function is to seal needs water, every noise and dust . Indeed , the sealing effect can be further improved by improving the design . Now anti-friction material requirements are also increasing, so that the sealing performance can be maintained for longer , but also to reduce the damage during the original installation . The main role of the seal is to make the car as much as possible with the outside world, to maximize driver and passenger comfort . It should be said , and now the seal connecting , sealing , decorative, security, and so have a greater degree of improvement over the previous twenty- 1980s, but in the decorative, environmental aspects are still some gaps .

3 passenger trends sealing strip

The rapid development of the automotive industry , the performance of the car with a variety of seal put forward higher requirements. Development of new materials, new technology applications of science and technology for the development of the seal industry provides a space for development. Requirements for seals not only stay on the connection , sealing, decorative three functions, the car 's environmentally friendly, safe , comfortable and beautiful and so put forward new demands. This requires the selection of material from the sealing strip , structural improvements, the selection of the manufacturing process required to continue to improve .

( 1 ) From the choice of materials , not just stay on the E PDM applications. Molding process is relatively simple thermoplastic elastomers : T PV ( thermoplastic elastomer vaporization ), TPE ( thermoplastic elastomer ), T PO ( thermoplastic olefin ) ,high security seal etc. has been widely used in some areas. They have strong coloring , compound and recyclability good , but also to meet environmental requirements. Physical properties of thermoplastic elastomer in Table 1, the following advantages : excellent flex fatigue life ; temperature ; high impact strength ; density ; excellent chemical resistance and weathering resistance ; excellent electrical properties ; high high tear and abrasion resistance ; colorability ; renewable ; able to co-injection molding and extrusion pressure and total polyolefin ; low tensile and compression set .

( 2 ) structural improvements : The outer surface of the composite in harmony with the vehicle interior materials of different colors , such as color E PDM, colored thermoplastic elastomer ; using surface coating wear and lubrication materials instead of the original flocking material ; application various smooth surface coating , matte or four colored composite material .

( 3) Process Improvement : full speed with pre- shaped hot air vulcanization ordinary microwave hot air vulcanization process + + + , greatly improving the surface quality and production efficiency vulcanized sealing strips ; cancel the original molding process , replacing various secondary injection molding process , both to improve the efficiency and quality improvements ; online instead of the original hand- spraying spraying .

4 Conclusion

In short , with the continuous improvement of quality cars , buses seal performance requirements have been increased . Structure is reasonable, humane design , production process flow , automation, product safety , environmental protection metal security seals, recyclability , matching aesthetics, diversity is important to consider the performance of automotive sealing .

Advantages elastic soft seal gate valve

Flexible soft sealing gate advantages:
1 small, lightweight, easy installation and maintenance, and can be mounted in any position.
2 simple and compact structure, plastic seal small operating torque, 90 degree rotation to open quickly.
3 linear flow characteristics tend to adjust better performance.
4 disc and stem-free pin connector structure, it is possible to overcome the internal leak.
5 seals can be replaced, and reliable sealing achieve bi-directional sealing.
6 disc spray coating according to user requirements, such as nylon or PTFE classes.
7 The valve can be designed flanged and wafer.
8 drive optional manual,security seals electric or pneumatic.

Small caliber Ball Valve Product Knowledge

An Overview
Ball in the petroleum, chemical, metallurgical and urban central heating and other industries has been widely used. But the sealing of PTFE polymer material of the ball, can not be used for temperature greater than 280 ℃ or transport medium was small granular condition. The materials for the sealing of metal hard seal ball valve, ball rotation will result in different structures of circumstances. Resilient sealing structure such as a metal seat, the elastic valve seat and does not form a gap between the spheres, so its great friction. Metal floating seat seal structure between its floating seat and valve seal is not easy. Combination ball softened sealing structure, because spare parts and more complex structure, increasing the difficulty of processing and manufacturing costs, especially small diameter seal valve, this structure is clearly not applicable. After repeated analysis and testing, and the help of CAD, successfully developed Q47H cam eccentric single seal valve seat fixed.
2 Work
Single eccentric cam ball seat valve center line offset with respect to the center line a, b, the valve seat sealing surface eccentric b. When the valve stem clockwise about O 90 °, then the sphere also rotates 90 °, and in close agreement with the valve seat sealing surface when the friction between the sealing filler stem between torque and friction torque is greater than the medium pressure forming torque, the valve will reach a reliable cable marker ties. As the valve seal with eccentric cam structure, when the valve is opened, the ball quickly from the valve seat sealing surface. When the valve is closed, the ball and seat sealing surface anastomosis quickly. So as to achieve the opening torque is small, close tightly purposes.
Three structural features
Small-diameter valve body cavity narrow space, the usual structural design is not applicable. Therefore, the stem ends with a short axis and processed into flat, spherical tank and the upper and lower holes are flat, the hole for connecting the upper and lower stem play a fixed sphere, limiting the role of freedom sphere, while balance the body cavity with the pipeline between media pressure. And stem with flat groove, the torque transmitted from the handle.
4 manufacturing and processing
Sphere two hole concentricity and ball valve centerline relative to the centerline of the eccentric dimensional tolerances more stringent requirements, generally require boring or CNC machining. Before assembly seat sealing surface and the ball should be equipped with a decent research, and then placed in the closed position of the sphere, installing left valve, adjusting pads, tighten the screws, the static pressure irrigation does not leak, this valve can be guaranteed in a sealed test under plastic security seal .
5 Conclusion
Seal small diameter ball valve structure in accordance with the length of existing home and abroad, connection type and dimensions related standards, the valve is not only suitable for conveying gaseous or liquid-phase medium, but also for medium and a liquid-liquid mixed slurry mixed media. The valve is used in metallurgy, textile and oil industries, to good effect.

Common features of the application of self-adhesive materials

As a self-adhesive label printing material from the surface of its structure is composed of three parts , namely the surface materials, adhesives and backing paper . Label surface material selection must be based on the use of environmental labels and handling.
Then the sticker surface material is a positive acceptance printing graphics , and finally back to accept the adhesive is applied to the material on the pasted object . Surface material to be able to adapt to printing and printing ink with good resistance, and have sufficient strength to be able to accept all kinds of processing, such as cutting , waste discharge , slitting , punching and labeling and so on.
In general , any deformable material may be a flexible adhesive material can be used as a fabric , such as commonly used paper , film, composite foil , types of textiles, rubber, thin metal sheet and the like. Types of surfaces depends on the final application and printing processes.
Some materials designed for extreme environmental conditions and design, while others tend to be short -time indoor applications . So now began to use self-adhesive label printing low pollution , waste less green printing materials , printing mostly began to flexo printing and other major green direction.
The following describes some of the labels is produced on the surface material used .
Latexes material : a strong flexible material , it is suitable for curved or cylindrical surfaces. The material of the rubber surface of the paper pulp can be sealed , so that dust and fibers are not spread . This point is particularly important for the tape label , this material was originally designed specifically for this .
Lithoprinting material : There is a very good ink absorption for the scanner. Printed material for its flat surface cleaning and famous , is a high-quality image and barcode printing the best choice.
Anti-clogging material : a shaky rough paper , have a good anti-dirty , suitable for uneven surfaces . This material has a strong and lasting adhesive , commonly used for retail goods price tag.
Casting coating material : is a high gloss pure white printing paper , mainly for advertising and packaging labels. Coating material applied on the computer to be very careful , because the ink may cause stains.
Marking materials : a stiff gray paper , commonly used in the shelf labels , ID labels lapel badges and other needs of stiff material made ​​from this material where the label surface separating from the backing paper to be especially careful, because this material Once crimped ,cable security seals not easily flattened .
Fluorescent materials : also called " white gloss " materials have a variety of bright fluorescent colors. This material is used to emphasize the importance of the document .
Foil laminated or solid material : a layer of thin metal foil is laminated to a paper base formed . The material in dark or bright metal products can often be seen .
Computer printable polyester materials : for heat , moisture , oil , abrasion and most commercial solvents have good resistance . The material is commonly used in the environment requires a lot of durability , such as certain equipment nameplate .
Vinyl : It is a universal durable nonporous plastic , can be used in grease, oil , water and chemical material surface. However vinyl difficult to print because the offset and letterpress ink drying on the surface is very slow . In many cases instead of ethylene with polypropylene .
Satin fabric : synthetic materials belonging , common clothes trademarks, name tag and other needs luxurious appearance package occasions. However, in the preparation of the surface rough silk is difficult to print out high-quality printed products .
Smudgeproof materials : a practical non-coated materials, specifically designed for the rapid absorption of ink . The material is mainly used for electronic data processing (EDP) and other computer printing .
Cited above is the most common types of surface material .container seals No one material to fit any environment, but the diversity of the surface material to meet a variety of different paste environment to ensure proud to meet the needs of most customers .

Seal packing precautions before installation , how to choose a suitable packing

A seal packing precautions before installing what ?
Sealing Packing Precautions before installation :
Remove old packing stuffing box is pre- installation inspection to prepare the point.
With the old filler filler before the first use special tools to remove all the stuffing box clean
Observe the various parts of the stuffing box without injury eccentricity defects , damage of the stem, bushings and packing stuffing box can affect performance.
Check whether other components can also be applied . Replace all damaged parts .
Second, how to choose a suitable packing ?
How to choose the right packing ? Packing in the selection must take into account two things.
① conditions required performance should be consistent with the packing . According to the relevant technical data to select the most able to meet the requirements of packing.
② sealing requirements must be based on the correct choice packing size. To determine the cross-section ,fixed length plastic strap seal please use the following formula estimates:
Cross-section = ( stuffing box diameter - stem diameter ) / 2
The apparatus of injury may need a larger cross-sectional packing, in order to compensate for damage.
Third, cutting and sealing packing installation pay attention to details
Cutting and sealing packing installation pay attention to details
1 , select the appropriate packing, mechanical precision cut by cutting the required length of the packing ring , without packing cutting machinery, in accordance with packing length L = ( D + packing shaft width S) X1.07X Ji to cutting, generally rotary shaft , a 90 ° straight cut, the valve with a 45 ° cut . Never tried to surround the stuffing box packing to determine the length . Or the packing around the stem with the same . Of a tube, it firmly suppressed, but not stretched packing. Then cut into sample loop , and verify whether it can properly fill the space , and to ensure there are no gaps at its interface . Then be used as a standard sample loop cutting other packing rings . If the finished product on a flat surface finish , soft or easily deformed if the packing can be produced according to a small sample loop tape , and talking under the rope to make the rest of the packing rings .
2, when packing for the valve, tamper evident tapes the valve packing section and the same space , it is best to preload ring: When used in pump, valve packing section and space ( approximately 0.3MM-0.6MM) and the shaft packing has a leak gap in favor lubrication and cooling .
3 , first install a filler ring , make sure no glue each filler dust or other debris . If needed, packing ring on the stem should be the same with the use of clean oil to lubricate . Staggered placement of each packing ring into 90 °. Ring in the axial slowly opened.

Leakage gasket

The gasket leakage :
General gasket leaks , there are four forms: interface leak , leak penetration , diffusion leaks, damage leak.
Interface Leak : The interface is not as gasket compression flange surface finish combined with improper flange deformation etc will leak in the sealed interface . For interface World leakage , the use of padded material can be clamped against the flange surface .
Penetration leak: Because the soft material of the material are mostly fiber, easy to dip appropriate media , in particular pressure . Due to capillary phenomenon,Fixed Length plastic seals the medium will penetrate into the low pressure side to form infiltration.
Diffusion Leakage: poor concentration , driven by the media or by sealing the gap sealing material produced by mass transfer and capillary leak . Diffusion is the result of molecular motion , and not one-way. Minimal pressure or vacuum in a sealed state , or sealed nitrogen, hydrogen and other permeable substances, as well as highly toxic , radioactive substances should pay special attention penetration and proliferation of two kinds of leaks.
Destruction Leakage: sealing parts relatively poor working conditions , thermal deformation, often affected by vibration, shock , improper installation , fastening force is too large , used repeatedly , deformation , stress concentration, fatigue strength and damage than the material aging , deterioration etc will cause damage leak. pull tight seal This leakage causes the greatest impact hazard is also large , to strengthen prevention.

About the gear pump mechanical seal requirements

Mechanical seals, also known as face seal (Mechanicalseal), is a dynamic seal rotating shaft mechanical seal performance and reliable amount of leakage, long life, low power consumption. Need frequent maintenance, and can adapt to the production process automation and high temperature, low temperature, pressure, vacuum, high speed, and various corrosive media. medium containing solid particles and other harsh conditions of the hungry sealing requirements. mechanical seal is rely on one or more pairs of lip perpendicular to the axis relative to the end face of the fluid dynamic pressure and the compensation mechanism stretch * (or magnetic) to keep under seal and then combined with the auxiliary shaft seal leakage resistance achieved devices gear pump mechanical seal requirements, mechanical tamper seals and soft packing seal is as follows:
Benefits:
1) reliable sealing, long-term operation in a sealed state is very stable, very small leak, the leak is about 1% of soft packing seal:
2) long life, in oil, water media generally up to 1 to 2 years or longer in the chemical medium generally work more than six months:
3) rub the power consumption, the friction power is only the soft packing seal 10% to 50%
4) essentially no shaft or sleeve wear:
5) maintenance cycle. Face wear can be automatically compensated, under normal circumstances do not require regular maintenance and repair:
6) resistance to shock, vibration of the rotating shaft and the shaft deflection of the sealed chamber insensitive:
7) applies to a wide range of mechanical numbered seals can be used for high temperature, low temperature, high pressure, vacuum, different rotation frequency, and a variety of corrosive media and media containing abrasive seal.

Polysulfide sealant range of applications

Although polysulfide sealant expensive, application subject to certain restrictions, but because it has a variety of excellent physical and chemical properties, so in a variety of major projects on both widely used.
1 , the construction industry : a large building roof seal. Such as the Three Gorges Left Bank Power House roof,container security seals the roof of Chairman Mao Memorial Hall , Tiananmen roof.
2 , hydraulic : Shanxi Yellow River Diversion Project , the Three Gorges permanent lock of expansion joints, Guangdong Dongjiang-Shenzhen Water Diversion Project .
3 , the airport road : western suburbs of Beijing airport renovations , Zhengzhou airport , airport Zhangjiakou part of the project .
4 , sewage treatment plants : According to incomplete statistics, 80% of domestic sewage treatment plant expansion joints are sealed using polysulfide sealant .
5 , Metro and Tunnel : Beijing subway station Andingmen waterproofing , Tiananmen East Station roof are sealed with a polysulfide sealant .
6 , aerospace industry: aircraft fuel tanks, cockpit seals ( military products ) .
7 , the automotive industry : car door shock seal.
8 , petrochemicals : gasoline, kerosene , diesel fuel storage tanks of various anti-corrosion seal. meter seals Chemical product storage tank seal , such as Power Group PAC workshop Jiaozuo Chemical storage tank is the crystallization of our sealant, a long time in about 80 ℃ and acidic environments, has been more than six months found no leaks phenomenon .
9, the electrical and electronic industry: such as refrigerators, freezers glass doors.

Labyrinth seal tandem dry gas buffer gas system

Tandem with intermediate labyrinth security seals dry gas seals seal buffer gas system
Sealed gas side seal dry gas seal is sealed using a filtered gas nozzle into a flush , as single-acting dry gas seal sealing sealing air system . From the dry gas seal leaking exhaust gas from the nozzle to the torch.
Labyrinth seal mounted in the middle of the torch nozzle to the gas supply pipe and a buffer between the mouth . Outside dry gas seals seals are used to prevent buffer gas leaking into the atmosphere. Using the electrical contact control differential pressure solenoid valve opening degree , to ensure a pressure buffer gas to the torch is always higher than the gas pressure , thus ensuring leak from the intermediate labyrinth seal is sealed with the gas discharge from the nozzle to the torch. If they are dry gas seal gas side seal failure , due to leakage of gas pressure , resulting in a buffer gas pressure increases ,cargo seal the intermediate labyrinth seal fluorine rubber seals to prevent leakage of gas leakage to the atmosphere . Leaking gas emissions to the flare .

T -ring to help God nine Flying

When God nine perfect docking with Temple the moment , Shanghai Academy of Spaceflight Technology 805 reports cheering sound into a hall as a docking mechanism for research and development unit , every face was beaming with pride smile. 33 -year-old Geng Haifeng , deputy director of the docking mechanism is the designer , he told reporters about God nine docking with Temple was " seamless" secret --- seals.
"When Shenzhou nine successful docking with Temple One , luggage seals the channel is opened, the two connecting body will form a large airlock order to ensure the safety of the astronauts in the cabin , the entire capsule tightness is essential. How guarantee complete sealing ring is one of the key points . " Geng Haifeng said.
Ring was placed in the Shenzhou nine active docking groove in the surface structure of the butt . Common with people living in different O-ring , God seals on nine docking mechanism was T-type, was stuck in a groove , no force in the case of space , does not automatically fall off.
Before docking with Temple One , God of nine docking mechanism mounted on the seal on the " bare ." In the harsh environment of space , seals to withstand 100 degrees Celsius to minus 75 degrees Celsius high temperature test , but also to withstand a variety of space radiation ,security stickers  which for the production of seals general materials, " Silastic " , it is almost impossible, because silicone rubber in a low temperature environment of " embrittlement " feature.
In order to study the special anti- brittle ring material , Geng Haifeng led the research team from the beginning of 2002 , before and after a six-year science and technology research . 2008 After the successful development of a single product , but also the whole together with a variety of validation tests and overcome countless difficulties

Common sense interpretation seal doors and windows

Door seals are mainly used in steel doors, aluminum doors and windows, wooden doors and windows and other architectural decorative doors and windows. The main role of dust, insects, water, noise and sealing. Steel doors and windows on the market are generally sealing strip PVC, modified PVC, EPDM elastomer seal, silicone and other materials out of shape.
Doors and windows sealed Features
Steel doors and windows high security seals is used widely in recent years, a new generation of windows and doors, it is more common seal doors and windows have better corrosion resistance, weather resistance, noise insulation. Steel doors and windows sealed, smooth surface, not only has excellent waterproof seal performance, but also plays a beautiful decorative effect. In the selection, the general requirements of the manufacturers have chosen a higher EPDM rubber or thermoplastic EPDM rubber.
Ethylene propylene diene monomer (EPDM) Product Key Features: Non-toxic, environmental protection, anti-aging, high temperature, stable performance, summer, winter can maintain good performance.
1, the steel skeleton three composite, not easily deformed contraction, ruggedly good sealing
2, doors, windows, curtain wall metal security seal, the product has good elasticity, resistance to migration, can effectively block the noise, dust, wind and rain.

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 wire seal 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 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 pull tite seals 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.

New packaging cylinder seal testing equipment successfully developed

Program uses traditional manual inspection, workers record data to determine whether the product is qualified. In this process due to excessive labor participation, subjective emotional factors such as greater impact, resulting in detection of poor reliability, and increased risk of product delivery. With the increasing levels of industrial production, product testing on a higher sealing requirements, the use of automated test equipment instead of the previous artificial tightness testing to determine ways for users to comprehensively improve the rate of qualified products will help to get more orders.
The packaging cylinder (rocket launchers) Leak detection equipment, a differential pressure leak rate of detection of the workpiece, by a certain period of time known volume container seal sealed pressure variation inside the chamber, to measure the tightness of the DUT, test speed ≤ 60 秒/ piece (excluding labor to take up work time).
The high degree of automation equipment can automatically determine whether the product is qualified and leak rate value is given, the test criteria according to actual needs, set their own. Test data is automatically stored to the database, it can automatically generate reports to facilitate product quality management. Test full automation, without human intervention judgment, reliability, delivery risk is small.
In addition, the device can simultaneously detect duplex, with Ethernet interface, the test results can be uploaded to the LAN server to facilitate statistical analysis.
Dwell time set according to the measured product-related standards, different products dwell time can be adjusted. Diameter Φ80 ~ Φ100mm, height 890 ~ ​​930mm products, dwell time is 10 ~ 90s (setting step 1s).
Equipment with system calibration and leak rate pressure calibration functions, high precision. Leak rate test range is 1 × 10-4Pam3 / s ~ ∞, repeatability error ≤ 5% indicated value (to test standard leak leak rate values ​​prevail); leak rate test pressure, positive pressure: gauge 20 ~ 150kPa ( Set step 1kPa), pressure setting error ≤ 1kPa; vacuum: gauge -20 ~-60kPa (setting step 1kPa), pressure setting error ≤ 1kPa.
In addition to the tightness of the packaging tube for accurate testing, the device can cover sheet for rocket launchers blasting test, burst test pressure: gauge pressure 0.4MPa.
With cargo seals seal products in various industry applications, the constant increase in its testing requirements. To adapt to changes in the market, leading state apparatus with particular attention to the expansion of the device, the device after a few modifications, but also applies to ammunition, food, cosmetics, pharmaceuticals and other packaging barrel tightness testing.

Liquid-gas seal industry should police the industry tick four major problems

According to the China Hydraulics Pneumatics &security seals Association hydraulic, hydraulic, pneumatic and cable sealing industry 296 major business statistics, from January to May, the industry profit margin 9.44%, sales rate of 97.38 percent, good convergence of production and demand, the market continued to exuberant. Among them, the industrial output value of 6.151 billion yuan, representing an increase of 32.54%; industrial sales output value of completed 5.99 billion yuan, representing an increase of 34.74%; achieved sales of 500 .. 4 billion yuan, representing an increase of 31.07%. In addition, 296 companies have 52 losses, the loss 17.56%, 296 enterprises breakeven profit 551.63 million yuan, an increase of 45.30%. 296 companies, there are 83 earnings in excess of $ 1 million with 23 profit of more than $ 5 million.
In the case of industry, the situation continues to improve, industry experts also remind companies need to calmly analyze the situation in the second half, attention, vigilance affect the industry, several major questions:
Limit the scope of the country's electricity is still expanding, producing considerable impact to the enterprise.
According to reports, the country's provinces and limited influence of power, has increased from the Yangtze River Delta, Pearl River Delta region expanded to 24 provinces, municipalities and autonomous regions, and the short term is difficult to solve. Production tasks continue to grow in the case of enterprises should strengthen internal management, to take all measures to give full play to equipment capacity, minimize the impact of the restrictions on electricity.
National macro-control effects on production show.
Countries to curb overheated investment in some industries, to take austerity measures, has enabled OEMs to reduce appeared to postpone or even cancel the order situation. Especially for metallurgical industries supporting hydraulic parts business, they reflect the greatest impact on the amount of 50% of the task. In addition, there is a hydraulic forklift industry supporting the factory, they reflect the order of 4 to 5 months volume has decreased significantly, the annual production, benefits may be unchanged from 2003.
Foreign firms to increase investment, merger and acquisition efforts.
Liquid tight at the world famous manufacturers have set up plants in our country, these enterprises currently has increased investment, mergers and acquisitions and speed of some of the projects are under negotiation. This trend should attract the attention of enterprises, which is both a challenge and an opportunity.
To do the strategic development plan, beware disorderly competition.