Polysulfide sealant polyurethane sealant brief description of the

Sealants are used to fill the gaps ( holes, joints, seams , etc. ) of the material , both bonding and sealing two functions . Polyurethane sealant with silicone sealant,printed cable ties polysulfide sealant sealant composition of the current high-end of the three varieties.
Polyurethane sealant widely used in civil construction, transportation and other industries :
The application of the building - doors and windows , such as glass filled seal ;
In the civil aspects of the application - highways, bridges , runways , etc. caulking seal ;
In automotive applications - window ( mainly windscreen) seal assembly .
Polyurethane sealant has many excellent features ,
Including :
( A ) Performance adjustable range, strong adaptability
( 2 ) good wear resistance ;
( 3 ) mechanical strength ;
( 4 ) good adhesion properties ;
( 5 ) good elasticity , excellent resilience , can be used for dynamic joints ;
( 6 ) good low temperature flexibility ;
( 7 ) good weather resistance, strap seals long service life of 15 to 20 years ;
( 8 ) oil resistance ;
( 9 ) resistance to biological aging ;
( 10 ) affordable.

Machine impurities into the seal face wear and tear caused by

The seal face contact and friction is normal, can enter the seal face of the solid impurities are very subtle , it is easy to seal water away , so there is no leakage of the sealing effect . Larger solid particles into the seal face , causing increased wear of the case , are not working properly sealed occur . Divided into the following situations:
( 1 ) In the downtime or maintenance after the initial test , the pipe seal dirty or poor water quality , solid impurities easy access to the seal faces . Therefore, the mechanical seal friction surface wear faster .
( 2 ) double mechanical seal in the sealing water pressure fluctuations , or below the pump , the pressure inside the pump body with chemical impurities into the medium from the inner end face of the seal chamber , some impurities remain in the sealed end face , resulting in increased wear and tear , single-acting mechanical seal built , due to media pressure fluctuations , seal face into the possibility of impurities is much smaller than the double-end , relatively longer life expectancy.
( 3 ) due to various reasons impurities into the seal face . Early peroxide mechanical seal face severe wear , wear mechanism from view, the main particle abrasion , adhesion wear only take place in a particular case , so we only discuss the wear particles . Peroxide particles wear rate is high , greatly reducing the service life of mechanical seals . Wear particles not only soft sealing ring ( graphite ring ) wear , but also hard seal ring ( mainly carbide ring ) wear particles generally worn surface has obvious rules nicks and grooves. The essence of wear particles in the vertical component of the hard particles under the action of the friction surface piercing , while under the action of the tangential component of the relative movement, so that the friction surface micro- machining process and plow . Wear particles and the hardness of the material not only than the pressure on the end face , and the microstructure of the material and the test temperature , load and stress the nature of the size , the size and hardness of the abrasive and chemical properties of the friction surface and other factors.
Friction pairing material hardness difference , tamper seal tape a great impact on the wear particles . Friction large difference in hardness , wear particles appear much less the case , friction and wear rate is also small ; but the hardness difference is small , the more wear particles occurs . The main reason is because when particles invade friction , high hardness in the ring , only embedded in graphite or graphite ring on the ring groove on wiping the hard ring is not bruised, but also to maintain the original finish , over a period of time the particles may also be sealed water washed away. The particles invade the friction surface , moving ring hardness is low, due to the hard ring is scratched , the effect of vibration and eccentric , such as rasp file graphite ring , causing serious wear and tear. Meanwhile abrasions ring itself is also growing . After running-in , snap ring groove surface and the surface of the graphite ring concentric grooves gradually coincide , then the leakage reduction .
In addition , stationary ring or ring leakage inlet end , if the chamfering is too large, larger particles can also lead into the friction surface along the slope , causing premature wear .
For special circumstances , tamper evident label special measures should be adopted , in the car or the initial sealing water is quite poor , in order to avoid premature wear of the mechanical seal failure , end than the pressure to increase the use of temporary practice , you can receive significant effect , due to increase spring pressure and no significant increase in friction wear particles contrary avoid early wear and extended service life.

Factors affecting the performance of the valve seal

Assessment of the valve is the valve sealing performance merits of the main indicators of quality . Valve sealing performance mainly include two aspects, namely, leakage and leakage . Endoleak refers to the closure member between the valve seat and sealing of the media reach , assessment criteria within the country there are two missing . One is the State Technical Supervision Bureau released in December 1992 , June 1, 1993 began the implementation of a national standard GB/T13927-1992 " universal valve pressure test ." This standard is used with reference to the international standard ISO5208-1982 " industrial valves valve pressure test " developed ; another was issued by the Ministry of Machinery Industry JB/T9092-1999 " valve testing and inspection ," This standard is referenced API598- 1986 " valve inspection and test " developed . GB/T13927-1992 for general industrial valves inspection ; JB/T9092-1999 industrial valves for the oil inspection . Leakage refers to the parts of the stem packing leak , the leak in the flange gasket and valve parts casting defects caused due to leakage, leakage is simply not allowed. If the media is not allowed into the atmosphere , then the leakage of seal leakage than the inner seal more important. Therefore, the valve sealing performance should lead to the manufacturer 's attention.
Factors affecting the performance of the main valve seal are: ① sealing surface quality ; ② sealing surface width ;plastic padlock security seals ③ valve before and after the valve pressure difference ; ④ sealing surface material and its processing status ; ⑤ media properties ; ⑥ surface hydrophilicity ; ⑦ seal film presence ; ⑧ closed parts of rigidity and structural characteristics .
⑴ quality sealing surface of the valve sealing performance of the sealing surface of the valve seat and the closure member is in contact with each other to shut down part. When the sealing surface pressure at 40MPa or less, the quality of the sealing surface of the valve sealing performance play a decisive role . This is because : When the sealing surface pressure is small, low surface roughness , the leakage is increasing rapidly . When the sealing surface pressure is large, the surface roughness on the leakage has been significantly reduced .
⑵ width on the valve sealing surface of the sealing performance of the sealing surface width determines the length of the pores . When the width is increased, fluid movement along the pores stroke lengthened to increase the resistance movement . Can be reduced to increase the width of the sealing surface pressure in the valve erosive wear . Increase the width of the sealing surface , it will cause leakage increased in proportion to the stroke length , and thus be able to proportionately reduce leakage. But the sealing surface width increases , in the same sealing force , vehicle seals the sealing pressure than decreases, but also make the possibility of leakage increases. Therefore, the increase can not be unlimited sealing surface width.
⑶ valve before and after the valve differential pressure on the valve sealing performance is analyzed theoretically , valves before and after the valve pressure difference is proportional to both the amount of leakage . But tests proved : in other conditions are the same , the leakage volume growth is increasing pressure differential over . Leakage between the pressure difference can be approximated by the following formula : G = M (N △ P2 + S △ P) where : M, N, S - constant coefficients, which depend on the material , the sealing surface processing quality , the sealing surface pressure and other conditions ; △ P - pressure differential.
⑷ sealing surface materials and their processing status on the valve sealing performance of the sealing surface materials and their processing status of the valve leakage have a great impact . As the remaining gap between the seal faces depends on the sealing surface micro-roughness , so that , if the use of steel materials, seals, resulting in sealing of the same , there must be greater than the pressure , the value must exceed brass system value than the pressure seal . The sealing surface of the processing state , such as a peak distortion , and sealing the gap size changes and other phenomena occur on the metal surface , it is clear that the performance of the surface properties of the base material have significant difference . Induced changes in the machining surface can affect the thickness of 50μm. Grinding the base metal is not exposed . Work is different from the metal surface tissue matrix organization . Geometry and material properties and microstructure geometry compared to little effect . Differences in the performance of metal , usually less than other factors . Sealing surface when working under low pressure conditions , the situation is more prominent. When the pressure ratio is higher than 40MPa , the surface roughness of the sealing performance is reduced , and the impact of the material is increased.

Spiral Labyrinth Seal

Spiral labyrinth seal is used in industry long ago, and it is different from the spiral seal in that: the axis of the helical groove machined surface , the holes in the sealing collar is made also vehicles , and has opposite the shaft screwed to the shaft and screw suites stark turbulent flow . Additionally , labyrinth seal spiral screw velocity higher than the sealing screw , which turbulent flow conditions for low viscosity liquids. cable marker ties Spiral laminar flow conditions generally used for sealing large -viscosity liquid ( such as viscosity liquids than water ) .
How it works: In between the screw and the threaded sleeve work space, the liquid in the collar two tooth surfaces and screw two tooth surfaces bounded by a number of cellular space . Screw and the gap between the threaded sleeve surface was grooved annular cylinder . Fluid through the vortex formed when the threads , the direction of flow in the opposite direction . As the screw fluid flow around a momentum exchange results , security seals screw the energy to liquid. Helix and threaded sleeve with the liquid interaction that results in through the gap between the screw and the threaded sleeve surface frictional force is generated in the name of boundaries . Friction generated by the liquid in between the screw and the threaded sleeve pressure .

Pump Mechanical Seal Overhaul Mistakes

1 greater the amount of spring compression seal better. In actual fact , the spring compression excessive friction can cause rapid wear , instantly burning ; excessive compression of the spring to lose the ability to adjust the ring face , resulting in seal failure.
2 ring seal Fig tight as possible . In fact, ring seals tight harm than good. First exacerbate inter- ring and sleeve wear, premature leakage ; Second, increasing the axial adjustment ring , the resistance movement , frequent changes in operating conditions can not make timely adjustments ; Third spring fatigue easily damaged ; four is to make the ring seal deformation, affecting the sealing effect.
3 stationary ring seal tight as possible . Stationary ring seals basically at a standstill , the effect will be relatively tight seal better, but too tight is harmful. One cause static ring security stickers due to excessive deformation, affecting the sealing effect ; Second, the majority of graphite stationary ring material , generally more brittle , excessive force can easily cause fragmentation ; three is to install , difficult to remove , easy to damage the stationary ring .
4 Impeller lock nut tight as possible . Mechanical seal leakage , the leakage between the sleeve and the shaft ( shaft between the leak ) is relatively common . Generally, the impeller shaft between the leak is not locking the lock master , in fact, lead to leakage between axes many factors , such as the failure of inter-axis pad , offset , there are impurities between axes , with the shaft and sleeve at a larger shape bit error , the contact surface damage , there is a gap between the shaft parts , threaded shaft is too long , and this will lead to leakage between the shafts . Lock nut locking pad between axes can only lead to excessive premature failure , contrary moderate lock locked mother , so that the shaft between the pads always maintain a certain degree of compression flexibility in operation will be automatically timely lock nut locking , so that the shaft is always in a good inter- the sealed state .
5 The new better than the old . In contrast, using the new mechanical seal better than the old , but the new mechanical seal quality or choice of material is not the time , with the larger size of the error will affect the sealing effect ; and permeability in the polymerization medium, the stationary ring without excessive wear, or not to replace as well. Because static ring stationary ring seat for a long time in a quiescent state , the polymer and impurities deposited as a whole, played a good seal.
6 overhaul better than not split tamper seal. Once the mechanical seal leakage will be eager to overhaul , in fact , sometimes sealed and not damaged , simply adjust the working conditions or the seals can be adjusted to eliminate leakage. This way to avoid waste and to verify their ability to judge the fault has accumulated experience in maintenance to improve the quality of maintenance .

Raiders against dust dusty weather sealed body care do

Clean the car mainly "large"
Some people may think to get the trunk of the oil duster sweep on it. In fact, things are not so simple , a little dust on the car 's damage is still very large . Filled the dust after cleaning vehicle owners who first thought is , you need to be reminded that , in addition to cleaning the dust surface of the vehicle , can not be ignored on the car air-conditioning , air filters, water tanks and other parts cleaning.
( 1 ) Clean the air filter
After the dust weather , we should first clean up the car air-conditioning installed in the air inlet filter because as the weather gets warmer, the increasingly frequent use of air conditioning ,barrier seals  if not promptly cleaned , air conditioning will be turned on when the dust along the wind Road into the car, pollute the air inside .
I believe that many owners simply do not know it exists , air filter machine under the hood near the front windshield location is inside the air inlet filter. As long as we noticed the parts , clean , we can guarantee the future when the use of air conditioning , interior air fresh . ( 2 ) clean air filter air filter is designed to filter the air sucked into the engine , to prevent foreign matter sucked into the engine and increase the wear and extend engine life. Dust weather , the dust in the air will be many times more than usual , the car's air filter will be attached to a lot of dust particles affect the engine air intake . So when the dust weather after friends recommended the driver out of the air filter , clear up above the dust , and to dust in the air filter assembly clean , which can greatly extend the life of the air filter , and to reduce fuel consumption also have a role.
( 3 ) clean water tank
Spring wind, catkins and more, after the dust storm , dust, catkins will gather in a large number of vehicles on the condenser and radiator , forming a layer of felt like the same thing , security seal affecting gas flow , so that the cooling effect variation, temperature corresponding vehicle increased. When the summer heat is not good because the condenser , air conditioning does not cool or it will result in failure of the water temperature is too high .
So dust weather , you can not ignore the tank cleaning , we recommend you check the vehicle before using the air conditioning condenser and radiator surface for dirt , debris, and promptly clean to avoid affecting the normal engine cooling and air conditioning systems .

Component polysulfide sealant specific construction methods

1, the sealing surface treatment:
Before construction of the former road after construction debris clean up residual waste , barrier seals reuse blower or vacuum floating ash handle clean , if the base surface moist after application of a blowtorch to dry again with a wire brush to remove after baking fall cement debris and dust. To remove the sticky surface oil, dirt and other debris and plastic attachments ( two-component polysulfide sealant stick plastic and oil, available portable cutting machine , grinding wheel, steel brushes and other tools work ) , clean and with a hair dryer blowing debris so strong adhesive surfaces exposed structural layer , the surface must be guaranteed completely dry joints , clean, no cream. All surface dirt and cement slurry must be cleared brush handle clean . Must be absolutely guaranteed to be sticky surface is dry , flat, in order to prevent adhesion failure . Metal surface rust and paint protection also need to be removed. If the structure quit, available blowtorch drying.
2 , before construction on both sides of the gap 10mm at 50mm wide masking tape affixed to prevent the construction of the structures of excess polysulfide rubber surfaces soiled.
3 , filling Backing Material:
According to the design requirements, the joints filled with backing material , generally designed to require filling polyethylene foam board , this seams on board our factory production, specialized and two-component polysulfide sealant supporting the use of buildings .
4 , brushing primer solution: design requires the use primer solution works , or long-term flooding parts of the vehicle seals , to brushing primer liquid surface was sticky , dry film ( primer reprovision ) .

Pump seals and parking sealing power calculation

Currently vice impeller pump seals dynamic seal and parking in metallurgy, mining and petrochemical industries are more common applications, dynamic seals and parking packing seal and mechanical seal can overcome some of the deficiencies , has a simple structure , reliable sealing, point the advantage of liquid does not leak .
Vice impeller dynamic seal :
Vice impeller dynamic seals ( also known as centrifugal sealing , fluid power seals, etc. ) can be divided into sub- blade impeller seal sealing and vice . When the pump rotates , the impeller is generated out of the fluid pressure P , and then to the outlet at the same time pressed against the packing room , the media leak out . However, since the sub- sub impeller blades and the role, it generates a centrifugal force P1 ' or P2'. The direction of the impeller pressure P in the opposite direction .
Therefore, the fluid can leak out of the top back . I.e. the formation of the seal cavity "and pressure seal " or " vacuum seal " , during operation of the pump to achieve leak . Because there are parking sealing device , the pump can be obtained when the parking sealed.
1 , the calculation of sub- blade seal
The plane of the impeller rear cover open for a few radial ribs , which is sub- blades. It is very small and the casing to maintain the gap , the liquid approximate angular velocity of the impeller , rather than the sub blades without angular velocity that is half This makes the role of fluid pressure at the packing chamber is reduced.
Without the secondary blade effect, the rear panel of the liquid pressure distribution ABEF. We know that when the impeller blades which produces vice pressure variation is parabolic . Which produces a pressure change is GKFG area .
Which can be obtained :
KF = EF-EK = {[H-(U22-Ub2) / 8g] - [H-(U22-Ur2) / 8g-(U22-Ub2) / 2g]} (1)
As Vice- vane pump there is a gap between the shell . The angular velocity of the liquid in the gap is smaller than the impeller angular velocity ω, but greater than ω / 2.
Stepanov think this is taken as the angular velocity can be approximated by : ω '= ω (1 + t / s) / 2
The formula : ω'- work wheel rear plate and the pump casing the angular velocity of the liquid in the gap
ω- job rotation angular velocity
S- pump casing and impeller cover the distance deputy leaves
t- sub blades average height
Thus , the filler can be obtained prior to the fluid pressure chamber EK calculation formula is :
HBr = H2-1/285 (n/1000) 2 {D22-DR2 + [(s + t) / s] (DR2-Db2)}
Where : HBr- deputy leaves after decompression pressure head ( m water column )
H2 = H-V32/2g, V3 = KV3 √ 2Gh
V3 is the average velocity of the volute
In the calculations, it can be assumed in advance isobaric plastic cable ties sealed, ready HBr = 0; if HBr vacuum seal is taking a negative value into the formula ( 2 ) , the outer diameter of the blade can be obtained sub- DR. If DR is greater than D2 calculated value, you need to consider vice impeller seal structure.
In the calculation , t can be pre-selected . Generally 0.5 to 1 cm , st is the deputy leaves a gap with the pump casing , and its value to the process to ensure accuracy . The smaller the gap , the greater the balance , but the processing and assembly demanding. This gap is related parts with an accuracy of 4 to 6 , the general admission st = 0.03 ~ 0.3 cm ( small pump take a small value ) . In addition, the DR calculated value is often too large. Correct value should also be tested to determine corrected .
Deputy Vice impeller blades and seals , to be consumed in some extra power ( called additional power ) . The power consumption of the auxiliary impeller mainly the friction loss of the liquid . We consider this power value is not exceeded when used after placement of the sealing ring on the wheel generated due to the power consumption amount of leakage .
In addition, it is consumed in the flow path a different unloading discharge hole and with wear on the clearance value of the power increase constant value. This power proportional to the square of the impeller diameter ,cable seals the average width is proportional to the blade .
In order to achieve the same balancing effect , is often appropriate to increase the outer diameter of reducing the width of the blade . Another additional power but also with boost capacity. When a negative value, gasification decomposition on the high side , Vice impeller diameter is large, the power consumption is large . To minimize power loss , the Deputy pressure value should not be designed too .

Spherical bearing disassembly techniques

Spherical bearing is a spherical bearing outer race out surface , sealing shields on both sides of the bearing self-aligning bearings.
390000 series spherical bearings are commonly used on agricultural machinery in Xinjiang , Fukuda , Zhongyuan combine harvesters , have widely adopted this bearing , a locomotive used on up to 30 disks. 390000 series spherical bearings through eccentric shaft fixing the bearing inner ring and eccentric sleeve socket head cap screws from the clamping action . In the maintenance , many machine hand will not dismantling the bearings , it is necessary to introduce the spherical bearing disassembly 390,000 series of technical points and considerations:
A , demolition
1 first with a hex wrench to loosen the eccentric sleeve bearing locking screw , and then cover with a small iron bar into the sink hole eccentric sleeve , against the direction of rotation axis eccentric to play loose .
(2) Loosen the bearing bolts. Together with the bearing removed from the shaft bearing . Note that the demolition before the shaft end bearing . Should be the other end of shaft bearing bolts loose, coloured cable ties so both ends of the bearing strength and damage each other .
Second, the installation
1 before installing the bearing to the shaft , you must unplug the jacket bearing retainer pin , while the journal surface polished smooth and clean , and in the journal at the oiled rust and lubrication ( to allow the bearing on the shaft slightly rotated ) .
(2) with the bearing and the bearing lubricant topcoat , the bearing into the bearing housing . Then the assembled bearing and housing units along the shaft . Pushed to the desired location for installation.
3 mounted eccentric . Condom at first eccentric eccentric sleeve bearing on the steps and along the axis of rotation by hand tightening . Then insert a small iron bar or withstand eccentric sleeve sink hole hand hammer percussion along the axis of rotation of small bars of iron. makes eccentric securely installed , and finally the eccentric sleeve locking hex screws .
4 Fixed bearing bolts do not tighten , plastic seals let bearing jacket can rotate within the bearing . Also installed the other end of the shaft with a bearing and seat , rotate the shaft several turns to the bearing itself automatically find the positive position . Then bearing bolt is good.

Hollow doors to see how to identify seal glance

REVIEW: essence of the problem is that businesses will not necessarily use the same door pocket and door material , solid wood doors with solid wood Door does not mean that it will . If you do a solid wood door with MDF Door , because it does not contain wood fibers , water prone to foaming , can cause deformation of the door frame , so the best time of purchase ask whether the merchant Door and door of a material .
The selection is not solid wooden door , they usually go hand knocking method determines whether solid , but there are not many doors you knock on whether solid, filled with stuffing inside ,adjustable length plastic seals knocked up with solid doors no difference, but also some owners use to experiment with ways to move the weight , in fact, try not to come out the same effect , because there are a lot of manufacturers put on weight like wood filler to fill in the door , do not come out the same identification .
First, the color of the porter whether their home matches , and then tap , weigh judge the quality of the door . Filler door is generally divided into solid and partially solid, solid filler is certainly heavy , the price also expensive, and some solid relatively light , relatively cheap . However, the market also has some sinister business of some scraps as filler to increase the weight , be careful when consumers buy .
Secondly , you can consult the tightness of the door staff . That is, we say, " seal " , it's in the door pocket and door contact part , feels relatively soft . Formal enterprises will add cable tie wraps, thus avoiding the seam after closing there is always a problem .
Again , that is asking Door material, because most doors if there are problems , mainly Door out of the question. Essence of the problem is that the businesses will not necessarily use the same door pocket and door material , solid wood doors with solid wood Door does not mean that it will . If you do a solid wood door with MDF Door , because it does not contain wood fibers , water prone to foaming , can cause deformation of the door frame , so the best time of purchase ask whether the merchant Door and door of a material .

Liquid sealant effect it has five broad areas of application

Sealant is a primer with the shape of the sealing surface deformation, not flowing, there is a certain adhesion of the sealing material. Configuration is used to fill the gap , in order to play the role of the adhesive seal . Typically bituminous , natural resins or synthetic resins such as natural rubber or synthetic rubber or dry dry viscous material as the base material , with talc , clay , carbon black, titanium dioxide and inert fillers such as asbestos , then add plasticizers, solvents , curing agent and catalyst is made. Sealant has good sealing performance , and good heat resistance, pressure resistance, dense medium characteristics, use of simple , commonly used in mechanical and electrical products still seal between joints , as well as more complex threaded joints sealing , etc. , sealants, liquid sealant is generally divided into two categories with anaerobic ,security seals  and more commonly used liquid sealant role has the following five effects:
1 , the surface effect
No matter how solid gasket compression , it will not completely fill the joints on uneven, there will always be a gap at the interface , and the liquid sealant was able to fill all depressions , showing a good sealing effect.
2 , adhesion results
Liquid sealant in liquid form , has a certain viscosity , having a joining surface of the metal adhesion , sealing beneficial .
3 , the thin film effect
In the joints between the liquid sealant is screw fastening , the formation of a film with the same space at the same time is very consistent with the surface . Meanwhile , the thinner the film , the greater resilience , the better seal.
4 , flow and pressure resistance
Using liquid metal sealant joints , gaps are generally less than 0.1mm , and the liquid sealant is a liquid of high viscosity , it is difficult to flow , thereby maintaining its good sealing .
5, the volume change and mobility
Solid gasket leak-proof effect is the compression of the cushion sheet elastic deformation . The liquid sealant is leakproof volume in the compression and stretching deformation , it does not exist solid gasket compression deformation, so there is no compression fatigue , pull tight seals elastic failure , stress relaxation and other phenomena , and it is always connected adhesion of the interface , the interface can be prevented leakage .

The method of techniques to enhance type plug

Enhance type plug has a variety of structural forms, enhance type plug according to the sealing surface of the material is divided into two kinds of soft seal and hard seal. The basic principle is to open up the cock, cocks and then turn 90 degrees to the process valve is fully open and valve sealing surface to reduce friction; close the valve when the cock is rotated by 90 degrees to the closed position and then decreased with body seal surface contact to Plastic seal.
1, double sealed to enhance type plug
Double sealed to enhance type plug with soft sealing structure. Cock body is a combination of three panels cylindrical plug body, set on both sides of the rubber plate sealing surface, the intermediate cylindrical wedge plug.
Open the valve actuator to make cocks rise, driven by both sides of the plate collapsed, and the combination of the plug body from the valve sealing surface, then drive plug body is rotated 90 degrees to the valve fully open position.
Close the valve drive mechanism so that rotation of the plug body 90 degrees portfolio to the closed position, and then push down the plug body, both sides of the plate is no longer in contact with the bottom of the body down the middle wedge plugs continue to decline, pushing through the beveled side plates mobile phase inlet and outlet, so that side of the soft sealing surface in contact with the valve sealing surface is compressed to numbered seals.
Double sealed to enhance type plug has dual obstruction and discharge function, the valve has a pressure balance device, to prevent abnormal pressure system, and can reduce the valve opening and closing moments of resistance. Since the metal surface after sealing ring is compressed in contact with each other, the valve has a fire safety features. Very convenient maintenance of the valve, the valve body can be made without removing the case from the pipeline, the bottom of the cap body by removing the side panels can be removed from the body replacement. It is also widely used in petroleum, natural gas, metallurgy, mining, gas engineering, textile, marine terminals, food, and water treatment and other industries to make adjustments, opening and closing the pipeline fluid use.

Rubber seal characteristics and application

Rubber sealing strip English name: rubbersealstrip. Rubber seal suggests that it is made of rubber production. Mainly used in automobiles, machinery, doors, windows and other areas, to prevent dust, insects, water, fixed, noise, vibration and sealing effect.

First, the rubber plastic seal of the features:

1, non-toxic, environmentally friendly, excellent aging resistance, high temperature resistance and chemical resistance properties of chemical drugs, has good flexibility and resistance to deformation, long-term use will not crack or deform at -50 degrees to 120 degrees can maintain its original between high sealing performance, has been cars, doors and windows, mechanical, electronic, electrical cabinets and other manufacturing industries widely used.

2, different shapes, different materials, or cold, heat, foam and other requirements with specific properties of products, can meet the needs of design and use.

Second, the rubber printed cable ties Typical applications:

1, used in steel doors, aluminum doors and windows, wooden doors and windows and other architectural windows and doors, the main role of dust, insects, water, noise, seals, etc.

2, the application of the doors in the door frames, side windows, front and rear windshield, hood and trunk lid, play a waterproof, dustproof, sound insulation, compartment temperature, shock absorption, decorative role.

3, used in electrical cabinet seal, which has a good sealing, waterproof, fire, insects, wind, every light, crash, and long service life characteristics.

Beware of cars damaged sealant aging

Rainwater infiltration sealant aging car even if the car is not water-soaked, after a rainstorm is also very likely a problem, the need for full testing and maintenance. Day after the downpour, the owner Mr. Luo take the car to go uncovered, a car door found in front of the driver's seat is water, foam pads have been wet, but the first officer position and the rear seats are very dry. Carefully check the windows, sunroof are closed properly, the car ran into the rain is how it? Inspection found that is due to the A-pillar near the rubber seal leaks caused by the failure of aging. Therefore, the owners usually have to check the vehicle sealing tape, such as the front windshield of the strip near the location of the security seal. Car wash when you can let the staff about using water jet edge sealing strip, check there is no water. If the seal problem, we recommend to buy the auto glass insurance vehicle, reported the insurance replacement; uninsured vehicle, you need to go to the beauty shop front windshield removed, with professional make up a good sealant stainless steel wire ties reloading. It is noteworthy that, to the way the check engine positions, such as whether there is water infiltration.

Regular inspection before the wind at the water tank interior modern vehicles are equipped with drainage holes, generally stagnant water inside the car mechanical and electrical systems severely affected by the situation is not much, but some of the longer period of time with the old car As the car sealant, etc. you need to pay special attention to the aging effect.

Soundproof doors seal will determine the effectiveness and compactness

Home door insulation insulation is very important because it communicates with the outside, the weak link is sound. Soundproof doors and depends primarily on the thickness of the door between the sash and the frame seal between the degree. Adaptation low energy saving windows and doors not only poor, and soundproofed effect is not ideal. Holes, cracks and the sound wave incident on the wavelength or the frequency, because the shorter the wavelength the higher the frequency, and thus the high-frequency sound, even if the gap is small, the noise will be negative.

In the process of making wooden stall doors made T-shaped groove, and add ancillary tamper seal  so that the door has a superior soundproofing doors closed, while also reducing the door closed the noise, and also enhanced heat retention of the door and the robustness of the structure. Wooden door sealing strip is directly related to the density. Seal of "hiding" in the door pocket and door of the contact area, good quality seal feels relatively soft, flexible, looks bright, formal corporate doors will add silicone seal, silicone seal of these physical properties, especially superior.

Silicone rubber seal strip is completely different from the ordinary, it has excellent resistance to compression performance, so sealing contact surfaces can do more, very effectively blocking part of the active window leak noise coming! More than ordinary tape noise insulation function, this seal durable, long life and longevity windows simultaneously, once and for all, no worries. Minus 50 ℃ is not stiff, high temperature 200 ℃, and home inside a pressure cooker seals used the same material, no shrinkage, no deformation elastic strong! As the saying goes: a good horse with a good saddle. With this seal is perfect! Under the same conditions, this security seals can be described as "immediate"! Sealed with silicone rubber sealing products so that the original window increased by 45% in winter unventilated, insulation, and temperature increase 3-8 ℃, heating and air conditioning costs saving 20% ​​-30%, wind pressure capacity enhancement, to not take the air, not into the dust, not into a variety of insects, the smell of the hallway into the house nor in Gone with the Wind and other advantages. In particular, noise performance is improved by 50% and increases wooden decorative effect, greatly increasing the service life of wooden doors, can be described once and never worry about.

Vehicle travel first check seal is intact

Early viewing of vehicle
1 View Tire
Holiday time can be in the car frequently and 4S stores will appear at this time to get together and repair and maintenance of the status, if when your vehicle needs repair, can take a long time. So we advocate us, before the arrival of the holidays check condition of the vehicle.padlock seals
The tires of vehicle safety related components, view is essential. First, check the tire pressure, most manufacturers will be the B-pillar of the vehicle or the orientation of the fuel tank cap marked tire pressure reference value, usually car tire between the 2.0-2.5bar, we only need to follow this range of tire inflation can be.
Degree of wear of the tire also needs to view, in the tread grooves, the tire will be in possession of the ultimate wear identification, if the tire tread and the logo in parallel, and that he will demand a replacement tires.
2 lights View
View vehicle lights are also an important part of demand, to ensure that the beam lights, high beam, fog lights (if equipped) are functioning properly lit together and do not neglect turn lights, showing the wide lights, brake lights and other lights adjuvant viewing. Lights no problem, will increase the security control, therefore, the view is an essential part of the lights.
3 View antifreeze, glass of water
Because the winter rain and snow weather is more, many owners will be able to use a lot of glass of water, so we advocate viewing vehicle, take a look at the stock of the glass of water and antifreeze, if less than the minimum scale, capable individuals to the lowest scale of on. In addition, we want to prompt is the best increase in winter frost glass of water, especially from the south to the north of the vehicle.seal cable
4 Turn off the alarm / prevent the battery is dead
Turn off the alarm at night to forget, a night down the battery power runs out of memory work is not uncommon. Thus, we advocate be able to turn off the alarm, and perhaps remove the negative wire to the battery, the real can not be able to prepare a set of batteries take the line to prepare for contingencies.