Nylon cable ties bags Features

With its equipment to improve their predecessors , and the growing market demand , we began to get involved in the production and marketing of all kinds of non-woven bags . The main products are : reusable shopping bags , shoe bags , promotional bags, wine bags , film bags , handbags , folding bag, nylon cable ties, vests bags, woven bags, food bags, advertising bags , all kinds of gifts, clothing packaging bags, woven calendars, woven hand bags, colored woven laminated bags , woven punching bags, woven pumping drawstring bags, woven vest bag , high- middle and low advertising bags, products bags, shopping bags , handbags , jewelry, bags, suit cover , pull tote , grocery bags , Oxford bags , canvas bags

1 , good work : whether it is still a tie line length constant pressure lines are clean ;

2, the fine print : Because the company uses automated machine printing, so regardless of chromatic version is still printing effects have traditionally been much better than the printed manual accory adjustable length plastic seal;

3 , weight prospective : A true, absolutely no need to get any false , B fabric Bohou average ; C good texture ;

4 , speed : single-sided monochrome generally yield a day device is 40000 -5 ten thousand .

5: The product has a moisture-proof , breathable , flexible, lightweight , non-combustion , easily biodegradable, nontoxic non-irritating , environmentally friendly tie lines, rich colors , low prices, and so the cycle again . 90 days can be placed outside the natural decomposition , placed in the indoor life of up to five years , burning non-toxic , tasteless, and without any remaining material, so as not to pollute the environment, is internationally recognized that the protection of the Earth 's ecological environmental protection products. Has passed the SGS, CE, EN certification.

Professional manufacturer of plastic seals, wire seals , container seals , electrical seal strong, temperature-lock , good corrosion resistance , easy to use , cheap and other characteristics across operating in instrument , meter boxes, gas , electricity, gas and water supply, ordnance , kerosene transportation, chemical, mining , cement, transportation, postal, customs , railway, financial supermarket , container trade commodity inspection , containers , ships, domestic air transport, domestic air transport, logistics companies, shipping companies accory waterproof labels, shipping handling equipment . Plastic seals, wire seals , nylon cable ties, Guangzhou wire seals , high security seals

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 .

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.

Mechanical seal Principle Overview

Mechanical seal is by one pair or several pairs perpendicular to the axis relative to the sliding face in the fluid pressure and compensation institutions elastic ( or magnetic ) to keep under seal affixed to achieve the merger with auxiliary shaft seal leakage resistance device .
Mechanical seal used by the stationary ring ( stationary ring ) 1 , rotating ring ( ring ) 2 , the elastic member 3 , the spring seat 4 , set screws 5 , 6 rotating ring secondary seal , and the stationary ring secondary seal 8 and other components composition, anti-rotation pin 7 is fixed to prevent the gland 9 stationary ring is rotated . Rotating ring and the stationary ring often also according to whether they have the ability to compensate for axial cyclic or compensation is also referred to as compensation .
Mechanical seal possible leakage of fluid channels are A, B, C, D four channels.
C, D leakage channels are stationary ring and the gland , the gland seal between the housing , the two are static seal . B channel between the rotary shaft sealing ring and , when Friction and wear , it can follow the compensation ring only for a small amount of movement in the axial direction , in fact, still a relatively static seal .
Therefore, these leak paths are relatively easy closure. The most commonly used static sealing rubber O-ring or PTFE V-ring , and as compensation or stationary rotating ring ring ring secondary seal , sometimes using both elastic elements feature rubber, PTFE or metal bellows structures.
A channel is a rotating ring and the stationary ring opposite end faces sliding Lamination dynamic seal , it is the mechanical security seals device of the main seal , mechanical seal in determining the performance and life of the key.
Thus , the processing requirements of the seal face is high , while the sealing end faces in order to maintain the necessary lubrication film , the system must be strictly the end surface of the cavity pressure per unit area , the pressure is too large, difficult to form a stable lubricating film , will accelerate the end wear ; pressure is too small , increase of leakage . Therefore, to obtain good sealing performance and enough life , in the design and installation of mechanical seals , we must ensure that the pressure per unit area of ​​face value in the most appropriate range.
Mechanical seal and soft packing seal comparison , has the following advantages: ① sealing is reliable in the long period of operation, the sealed state is very stable, very small leakage , according to rough statistics, the leakage is typically only soft packing seal 1/100 ;stainless steel cable ties ② long life in oil, aqueous medium, generally up to 1 to 2 years or more, usually in the chemical medium can be more than six months ; ③ friction power consumption is small mechanical seal friction power only soft packing seal 10% to 50%.

Plant transformation advantages pump seals

Over the operational status of the pump before and after reconstruction comparing this transformation has several advantages .
Save money
Although the transformation of the former investment more ( Note : buy American -made packing guns need 10000.00 yuan / to ; wadding 6000.00 yuan / kg), but because of its durability ,wire seals and is a one-time investment , from a longer time perspective, than with packing can save money by about 30% .
Little maintenance and easy
When the pump runs less time that a leak can be directly injected filler gun to packing room , and do not stop, than the tight packing method to be convenient and effective. And that such filler longer period, generally up to three months ( continuous pump operating conditions ) . Do not need to run for the period just add filler filler.
Sealing effect
Use of effective, safe, using a wide range . As the filler was mashed in a pressure situation tightly, so good sealing effect . The filler mainly composed of carbon fiber , Teflon , Kevlar and other synthetic raw materials , high abrasion resistance , low friction coefficient , and a good impermeability of the protection sleeve is very favorable. By comparison, the life cycle of the sleeve longer than the transformation of the former more than doubled. And it is not only for cold water pump, heat pumps can also be used ( eg drain pump ) , and suitable for different sizes of pumps.
Most power plants in Guang'an stage single-stage overhung centrifugal pump mechanical seal is used ,nylon cable ties it can be in a single-stage double-suction centrifugal pumps ( such as open-cycle cooling water pump ) and other low-pressure pump on the transformation , while reducing maintenance and operating personnel and equipment leaks , and to promote economic efficiency plant .

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.

Porous mechanical seal processing methods Analysis

Mechanical seal mechanical security seals structure of porous structure. Ring seal ring is flat, flat end face of the stationary ring arranged with uniform pores rules to form a porous face. Microporous round hole, oval hole or tapered bore.
Diameter from a few microns to hundreds of microns, hole depth from a few microns to tens of microns, porosity (pore area percentage of the total face area) from 5% to 30%.indicative seals The surface roughness of the porous end with the same stationary ring surface roughness, Ra are 0.01 ~ 0.02μm.
Porous mechanical seal processing methods
Cover depth micron processing flow slots or pores, conventional machining methods are almost powerless. So people explored a variety of processing methods, mainly the following: photochemical etching process (photolithography), EDM (electric etching), electrochemical machining and laser processing method.
Compared to conventional processing techniques, laser processing for a wide range of different materials, different shapes are suitable for machined surfaces with no mechanical deformation of the workpiece, clean, fast, good repeatability and high degree of automation. Obviously, for the porous mechanical seal rings, the other processing methods are powerless, only the use of the laser processing method in order to obtain satisfactory results.
Friction performance test
End load with the seal ring, respectively, and the common seal ring laser processing porous comparison test, two kinds of seal ring face size, surface roughness, end load and speed, etc. are identical test conditions, carbon graphite material of the seal ring sealing ring paired with both tests run. Laser Surface mechanical seal mechanical seal friction coefficient than the average coefficient of friction is much lower. From the friction coefficient of view, high security bolt sealsordinary mechanical seal friction coefficient in boundary friction state, and laser processing porous mechanical seal friction coefficient in mixed and even liquid friction state, therefore, the laser processing of porous seal ring seal rings than ordinary has better friction properties.

Select two aspects of imported bearings mechanical seal structure

Bearing structure type mechanical seal selection is an important step in the design cycle , you must first be investigated : ① operating parameters of the medium pressure , temperature, shaft diameter and speed . ② the concentration of dielectric properties , viscosity, corrosion , with or without solid particles and fibrous impurities are easily vaporized or crystallization . ③ host work characteristics and environmental conditions continuous or intermittent operation ; mainframe installed in the indoor or outdoor ; atmosphere surrounding the nature and temperature changes. ④ host allowable leakage seal leakage direction ( internal leakage or leakage ) requirements ; life and reliability requirements. ⑤ host sealing structure or size. ⑥ operation and production process stability .
1, according to the operating parameters p, v, t Selection
Where p is the pressure of the medium at the sealed chamber , according to the size of the p-value can initially determine whether to select balanced structure and the degree of balance . NSK Bearings for medium viscosity, good lubricity , p0.8MPa, or low viscosity, poor lubricating medium , p0.5MPa when the structure is usually used unbalanced . p-value exceeds the above range , you should consider using balanced structure. When p> 15MPa , generally single face -balanced structure is difficult to achieve sealing requirements , then you can use multiple tandem seal .
Refers to the average diameter of the circumferential sealing surface velocity , depending on the value of the size of the elastic member to determine whether the rotation with the shaft , which uses a rotary spring or spring static structure , generally <20 ~ 30m / s in a rotary spring can be higher speed conditions, the rotating parts can lead to strong vibration unbalance mass , preferably spring stationary structure. If p and values ​​are high, considering the selection of hydrodynamic structure.
t is the seal cavity medium temperature , FAG bearings based on t determine the size of secondary seal material, the sealing surface of the cooling method and its auxiliary systems. Temperature t in the range of 0 ~ 80 ℃ , secondary seal is usually chosen nitrile rubber O-ring ; -50 ℃ t <150 ℃, according to the strength of corrosive media , the choice of fluorine rubber, silicone rubber or Teflon molding packing ring: temperature < -50 or t150 ℃ , the rubber and PTFE will produce low or high temperature aging embrittlement , metal bellows structure can be used at this time . Medium turbidity higher than 80 ℃, in a sealed area is usually necessary to be considered at high temperatures , the cooling time must take appropriate measures .
Second, according to media characteristics selection less corrosive media
Usually use the built -in mechanical security seals , SKF bearing its face the stress state and the direction of media leaks than the external and reasonable. For strongly corrosive media , the more difficult the selection of the spring , the choice of external or PTFE bellows type mechanical seal , but generally only applicable p0.2 ~ 0.3MPa range.
Easy to crystallize , easy coagulation and high viscosity medium , large springs should be used rotating structure. Because small spring easily be blocked solids , high viscosity media make small spring axial compensation movement blocked.
Flammable, explosive, toxic media , in order to ensure that the media does not leak , you should use a sealing liquid ( liquid separation ) of the double-end structure .
Press the dielectric properties of the selected operating parameters and the structure is often only a preliminary program , INA Bearing ultimately determine the host must also consider the characteristics and the sealing of some special requirements. For example, the rocket engine seal life just a few minutes , but requires a short time absolutely does not leak .nylon cable ties Sometimes hosts on the ship in order to obtain a more efficient space , the size of the seal and mounting position are often made ​​very demanding , and if the drain pump on submarines , submarine ups and downs in the process, the pressure varies widely and so on. In these cases , it is not the conventional structure of the selection criteria , and must be specially designed for the specific conditions , while taking the necessary complementary measures.

Chemical pump mechanical seal options introduced

No leakage is always the pursuit of chemical equipment , it is this requirement led to the application of magnetic pump expanding . However, truly no leakage is still a long way to go, such as magnetic pump containment shell life issues, pitting the material problems of static trailer seals sealing reliability issues and so on. Now on some basic aspects of seal briefly as follows:
A seal forms for static sealing , it is usually only two forms of gaskets and seals , and O-ring seals Youyi most widely ; For dynamic sealing , chemical pumps rarely used packing seal, mechanical seal based , mechanical seals have single face and double face , balanced and unbalanced type of points , balanced for high pressure sealing medium ( usually refers to pressure greater than 1.0MPA), double end mechanical seal is mainly used for high temperature , easy to crystallize , there viscosity, containing particles and toxic volatile media , double end mechanical seal should insulating liquid is injected into the sealed chamber , the pressure is generally higher than the medium pressure 0.07 ~ 0.1MPA.
2 , the sealing material chemical magnetic pump static sealing materials commonly used Viton, PTFE used under special circumstances materials ; mechanical seal ring material movement configuration is more critical , and not on the best carbide cemented carbide ,vehicle seals high prices on the one hand , the hardness difference between the two is not too unreasonable , so it is best treated differently according to media characteristics .

Asphalt pump mechanical seal repair errors introduced

1, the ring seal tight as possible . Asphalt pump stationary ring seals basically at a standstill , the effect will be relatively tight seal better, but too tight is harmful.
One cause static ring seals due to excessive building deformation, affecting the sealing effect ; two is mostly static ring material with graphite . Generally more brittle , excessive force can easily cause fragmentation ; three is to install , difficult to remove , easy to damage the stationary ring .
2, the new better than the old . Relatively new asphalt pump 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, such as non- stationary ring excessive wear, or not replaced as well. Because static ring stationary ring seat for a long time in a quiescent state , the polymer and impurities deposited into one. Played a better Plastic seal.
3 , static overhaul than never dismantle good, asphalt pump mechanical seal leakage will occur once the rush 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 .
4 , impeller lock nut tight as possible . Asphalt pump mechanical seal leakage , the leakage between the sleeve and the shaft ( shaft between the leak ) is relatively common , generally believed that the impeller shaft lock nut ask leak did not lock their buying lead to leakage between axes many factors , If lapse between axes pad , offset shaft ask there impurities, with the shaft and sleeve at a larger form and position errors , contact surface damage. shaft there is a gap between the various components ; shaft threaded shaft is too long , and this will lead to between the leak. Lock nut locking pad between axes can only lead to excessive premature failure , contrary moderate lock locked mother, so always keep a pad shaft ask Piece Goods compression elasticity, in operation lock nut locking automatically timely , so that the shaft is always in a good inter- the sealed state .
5 , ring seals tight as possible , in fact, detrimental tight ring seals . First exacerbate the wear ring and sleeve between 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 move ring security stickers deformation, affecting the sealing effect.
6, the greater the amount of spring compression sealing the better . Its buy Otherwise, 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.

Characteristics of the various types of sealant summary

Sealant definition:
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 Category:
Can be divided into elastic sealants, liquid sealing gasket and sealing putty three categories.
Sealant Application:
Widely used in construction , transportation, electronic instrumentation and components of the seal.
Sealant by use classification :
1 Building Sealant
Such sealants for building a variety of sealing seams or holes to prevent gas , liquid, solid through and prevent displacement of structural materials in the structure is destroyed, wire seals and thus play a thermal insulation, sound insulation, waterproof, dustproof , anti-gas , fire , corrosion , vibration and prevent accumulation of foreign joint function .
2 automotive sealant
Automotive sealant is a modern car engine repair emergence of new sealing material , automotive sealant variety, it can be applied to different parts of the car . For example, it can be a good solution to car engine leaking oil spills and leaks and other issues.
3 electrical insulation potting sealant
In order to ensure the motor , electrical components and electrical properties of stable and reliable mechanical strength required between the conductors , the gap between the insulation and the outlet lead security seal labels.
4.Packing Sealant
Sealing an important part of the packaging . Sealing a direct impact on packaging effect , packing and storage life , and even affect the credibility of the packaging .

Non-contact gas lubricated mechanical seals use

This article summarizes the mixer contacting gas lubricated mechanical security seals important insights , the proper use of appropriate purposes mixer gas seal for the user to improve the quality of great significance to improve product purity . Discusses the mechanical seal is very important to clarify the distinction between various sealing systems mainly basic fluid lubrication liquid hybrid bearing housing with common shaft axis
Blender does not contact with the gas lubricated mechanical seals ( low speed ) sold in the market , there are already more than 10 years . In the past 10 years, has made ​​a series of experiences . This paper summarizes a number of important insights. When used correctly in the appropriate purposes , the mixer gas seal can help the user to improve quality and increase product purity.
When discussing the mechanical seal , the most important thing is to figure out the differences between various sealing systems . Mechanical seals are three basic types: fluid lubricated mechanical seals, gas lubricated mechanical seals and touch off style or called non-contact gas lubricated mechanical seals.
These types of mechanical meter seal difference is in the fluid -lubricated sliding surface of the seal between the fluids. These seals are usually applied mixed friction purpose mixer. For dry running seals, two sliding surfaces in direct contact with each other . On the other hand , the non-contact gas-lubricated mechanical seals , in the operation of the sliding surface is not in direct contact . There are 1 ~ 5μm wide gap separating the surface , which is why this is often referred to as the seal seals from seal causes. When referred to the gas damping double seals should have this distinction.

Sealing strip doors and windows sealed in the field of the use of

Windows layering tops into the glass sealing strip and two kinds. Want the whole story window seal tie wraps must be done within a fan on layering and wearing a sealing strip, the only way to make glass and box fan finer , thus ensuring the tightness of windows .
Inspector said window frame and wall junction should be done sealants , handling should be smooth and straight . Between the glass and the window frames are tight rubber seal , not only to the aesthetic problem , but also affect the window glass sealing effect.
Windows sealed condition inspection points include sash seal sealing effect , sash indicative seal sash and window frames usually in contact at the mosaic . Inspection windows batten main points are: seal surface should be smooth, flat , straight , interfaces to meticulous, neat .

Analytical advantages of spiral seal

Advantage
1, spiral seal is a contactless releasable cable tie Lane, and allows a greater sealing gap, the solid-phase friction does not occur, the working life of up to several years, and easy maintenance.
2, the spiral sealing a "dynamic seal", which relies on the establishment sealed shaft power consumption state. Shaft sealing portion of the power to overcome the friction within the gap, and the other part of the direct pressure head for generating a centrifugal pumping, thus only medium shade leak.
3, screw seal for gas medium conditions. Because spiral gap can be filled with viscous fluid into liquid gas phase conditions.
4, the screw seal for low pressure working conditions (pressure less than 1 ~ 2MPa). Then a small amount of gas media leaks, cable sealing liquid (ie viscous liquid) can achieve zero leakage. Without sealing liquid cooling, simple structure.
5, in addition to as centrifugal pumps and screw sealing pressure centrifugal compressor shaft seals can also be used as a dust seal.

Introduction shaker seal species

Usually based on the different characteristics of the material, you can choose to use three different materials vibration sieve ring, namely: rubber seals, silicone seals, polyurethane barrier seals. These three rings have different characteristics, according to material properties, the right choice ring, can extend the seal life, effectively reduce the production costs.
1, rubber seals
Rubber seals are the most commonly used equipment vibration sieve seal parts, mainly because of its low cost, stable performance, but such as filtering material is corrosive, high temperature, big oil and other characteristics, the rubber seal is not as useful the. Usually no special materials such as user requirements, shaker vibration sieve manufacturers have opted for the factory installed rubber seals.
2, silicone seals
Silicone seals relatively high cost, but with a chemically stable silicone seals, thermal stability, adsorption properties, relatively high mechanical strength, etc., such as the user has the relevant characteristics of the material selection, choose silicone seal laps.
3, polyurethane seals
Vibration sieve polyurethane Cable tie are the most infrequently used equipment seals, mainly due to higher cost. Polyurethane seals with oil, corrosion resistance, high temperature and other characteristics, screening materials with relevant features users should choose to install polyurethane seals.

Application of organic silicon products

Silicone products have good resistance to high and low temperature performance, can usually be at 180 ℃ under high temperature long-term work. Silicone rubber at 250 ℃ can work a long time, instantaneous ability over 1000 degrees Celsius. Silicone Materials Low temperature performance is good, generally -55 ℃ can still work. Some of the silicone rubber is still elastic at -110 ℃. Silicone material has good electrical insulation properties, dielectric properties do not vary with temperature and radical change; permittivity increases without increasing frequency value; and arc resistance, corona resistance, leakage; resistant to ozone, radiation, tamper proof padlocks weathering , flame retardant, so extremely versatile. Below are several categories of silicone products were briefly a part of the main purposes:
1 silane coupling agent is a silane coupling agent class of low molecular weight compounds, the silicon atoms are connected to one end of a variety of hydrolysable chlorine or an alkoxy group, the hydrolysis can be connected with inorganic; other end with a variety of the role of organic phase functional groups such as amino group, a vinyl group, a mercapto group, and the silane coupling agent, organic and inorganic substances can bridged together. Silane coupling agents are commonly used in hundreds of species. Such as glass, steel, glass fibers to be used is necessary to use a vinyl-containing coupling agent to improve the wet strength. The current popularity of "green" tires on the extensive use of thiol-containing silane coupling agent; vinyl trialkoxysilane with crosslinked polyethylene, its working temperature can be high than ordinary polyethylene and polyvinyl chloride, suitable hot water system pipes, cable sheathing.
(2) silicone oil or a silicone oil containing a single type of low molecular weight organic polysiloxane groups,wire seal can be made into a variety of different viscosity. Low surface tension of silicone oil, a large contact angle with water, water repellent material of high quality. Silicone oil viscosity-temperature coefficient of variation is small, does not solidify at low temperatures and is resistant to both high temperature and low temperature aerospace gyroscope oil, antifreeze and heat-resistant lubricating oil, hydraulic oil, instrument oil, base oil, as well as steam low pressure high vacuum diffusion pump oil. Silicone oil or a modified formulation in cosmetic applications has grown rapidly in recent years. Silicone oil paint on the skin not greasy feeling smooth, comfortable, can be made into various skin creams and so on.

Combination of hydraulic seals Seals

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 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 cable sealing 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 (metal cable ties)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 .

The purpose of sealing compound

Ethylene propylene diene monomer (EPDM) Foam microwave curing process of forming a smooth surface appearance, has good flexibility and resistance to compression, resistance to weather aging, ozone resistance, chemical resistance, and wide temperature range (-40 ℃ ~ +120 ℃), excellent performance, has been manufacturing automotive Fenestration other widely used. Different shapes, different materials, or cold, heat, foam, solid body, as well as a special performance requirements for products, can meet the needs of design and use.
Product Features:
(A) self-adhesive door cable seal EPDM (EPDM) rubber foaming, creating its excellent properties.
● Excellent resistance to weather aging resistance ● ozone resistance, chemical resistance characteristics ● flexible foam pull tight seals
● Excellent cold and heat resistance (-50 ℃ ~ +170 ℃) ● super flexible, 200% stretch ● Inexpensive
Material:
1, using high quality EPDM rubber, foam production process.
2, the back of imported double-sided tape, laminated fiberglass for the grid.
Scope and installation methods:
1, applies to all kinds of doors, windows and so on.
2, Installation: Built-sided adhesive, you can directly paste (paste surface must be smooth, clean, smooth, dry).

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 seal is used widely in recent years, a new generation of windows and doors, it is more common numbered seals 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 container seals  the product has good elasticity, resistance to migration, can effectively block the noise, dust, wind and rain.

The necessary knowledge to use security seals

The main role of security seals security, a lot of places in the right security seals are used, there are strict requirements, you must pay attention to the operating procedures, the use of security seals is a lot of knowledge, and in this respect it must be noted .wire seals
1 sealed officers have no right vehicles in normal Shi Feng Kai Guankou device, sealing;
(2) All drivers are not modified seals, if found inner exception, you must live sealed by the customer signature recognition. Report simultaneously to the operating personnel, management dedicated confirmation;
3. The driver of the vehicle at the scene only Guankou sealed;
(4) Other personnel, such as work needs to be unsealed, you should notify the customer together unsealed and sealed;
5 Guankou device for sealed, the seal must be clearly visible on the identity and number;
6 sealed after the wire head, the length should not exceed 1.5cm, extra rope must be cut with diagonal pliers treated steel head resorted holes spread;
7 logo and number font is unclear, the responsible person shall promptly report to the users, the timely replacement.
Above 7:00 are using security seals the necessary knowledge.meter seals suppliers