Plastic seals on construction provides a lot of convenience

Plastic seal has the following advantages :
1,Accory Fixed Length plastic seals with high strength, good adhesion , fully integrated with putty , etc., to facilitate construction , reduce labor intensity , speed up the construction speed , reduce construction costs. Straight appearance, and greatly enhanced the force of impact -resistant corner , protect the wall from damage , effectively avoiding the corner to break something and repeated repair trouble.
2, can be bent as needed , to facilitate the construction , beautiful arc .
3 , construction and long-term existence of the sun angle is not straight , pretty, easy to damage , such as quality defects corner . On the exterior wall thermal insulation , construction is slow, poor impact resistance corner , after a long period of weathering, water seepage , causing the wall to crack.
Use of this product will solve all the above problems and engineering quality wall hand over difficult issues, to ensure that no cracks insulation mortar layer and the plastic strip with fiberglass mesh high bond strength , acid and alkali . Using this product , but also improve the level of shock , reducing earthquake  Accory adjustable length plastic seals is for a corner, door corners, difficult corner of the window construction of a new building specifically designed . Plastic seal with a unique weathering , corrosion , anti-aging characteristics known for its strength, toughness has assured people instead of steel , wood , aluminum and other traditional building materials .What is the Accory plastic seals
Plastic seal consists of two parts , one end is a square plastic mouth , which has a flexible plastic hook buckle , the other end is a plastic body with a serrated seal strip , strip across the front of the body can be bent to form a ring of plastic mouth and equipment, like pants belt can be used as a cable bundle . As the seal of the body can be flexible plastic serrated plastic buckle adhesion mouth , so plastic seals can play a very strong role in fixing .

Velcro Tips security seals

Aka Velcro accory cable ties , Velcro cable ties, tie it with ordinary differences, common ties, functional design retreat ended , only more and more tightly tied . The Velcro strap using velcro production principle , it is a male and female sides of the connection assistant , one side is the other side of a small soft fiber is harder to catch things like hairs , click on the stick together , and in a certain subject under tension, elastic hook is straightened, pine gum and open from the velvet ring , and then restore the original hook type , so repeated opening and closing of up to ten thousand to pay as much as Velcro is widely used in various types of goods frequent opening and closing or fastening position, but are only using the traditional Velcro sewn way fixed on the product or object.
It is using the latest technology , special materials production and processing , high- strength magic stick ties , Velcro close , you can use repeatedly tying . Velcro strap Velcro side for the full coverage of the rough surface , the other side seam 2cm long Velcro Hook , Velcro hook side can close any part of the Velcro surface gluing hair , a little harder to tear . Single variety of wire diameter can be bundled within 1-250mm range of items accory high security bolt seals, a plurality of end to end of the wire can also be bundled more articles .

To help you choose the wire and cable protection cover reasonable

Issues related to the cable model
1, SYV: solid polyethylene insulation RF coaxial cable
2, SYWV (Y): physical foam polyethylene insulation cable systems cable , video ( RF ) coaxial cable (SYV, SYWV, SYFV) applies to closed-circuit TV surveillance and Engineering
SYWV (Y), SYKV cable TV, broadband network dedicated cable structure: ( coax ) oxygen-free round copper single physical polyethylene foam ( insulation ) ( tin wire aluminum ) PVC (PE )
3, the signal control cable (RVV sheathed cable , RVVP shield ) suitable for building intercom , burglar alarm, fire protection, automatic meter reading and other projects
RVVP: copper core PVC insulated shielded PVC sheathed cable core voltage 300V/300V2-24
Purpose : equipment, instruments,security stickers intercom, monitoring, control installation
4, RG: physical foam polyethylene insulation for coaxial cable access network fiber hybrid network (HFC) analog signals transmitted data
5, KVVP: braided shield PVC sheathed cable uses: signal transmission electrical, instrumentation, power distribution unit , control, measurement
6, RVV (227IEC52/53) PVC insulated flexible cable uses: household appliances, small electric tools , instruments and power lighting
7, AVVR PVC sheathed flexible cable installation
8 , junction box SBVV HYA data communication cables ( indoor and outdoor ) for telephone communications and radio equipment connected to telephone wiring network wiring and use
9, RV, RVP PVC insulated cables
10, RVS, RVB for household appliances, small electric tools, instruments, meters, lighting and power connection cable
11, BV, BVR PVC insulated cables use: apply to electrical instrumentation and dynamic lighting for fixed wiring
12, RIB speaker cable ( fever line )
13, KVV PVC insulated control cable uses: electrical, instrumentation, power distribution unit signal transmission, control, measurement
14, SFTP twisted pair telephone,cable ties data and information network
15, UL2464 computer cable
16, VGA monitor cable
17, SYV coaxial cable wireless communications , broadcasting , surveillance systems engineering, and related electronic equipment to transmit RF signals ( including integrated with coaxial cable )
18, SDFAVP, SDFAVVP, SYFPY coaxial cable, elevator
19, JVPV, JVPVP, JVVP core PVC insulated and sheathed copper wire braided computer control cable

Hydraulic equipment damaged by the impact of seals

Mechanical processing industry, hydraulic transmission is widely used, such as lathes and other types of semi-automatic hydraulic transmission . These machines during use , such as the impact of frequent , reptiles and other faults , diagnostic repair, often in the hydraulic control components ( such as various types of pumps, valves ) can not find the cause of the malfunction , resulting in maintenance trouble. The final such failure or normally found on the actuator causes the cylinder piston sealing element due to severe wear . Such phenomena especially "O" ring seal see more .
Example 1: a CE7120 hydraulic copying lathe, turret profiling occurs in the work cited by the sword turn longitudinal feed line cutting die cutter , resulting knife fight , scrap living phenomenon frequently, the machine does not work.
Inspection and Maintenance : Check no fault of the hydraulic control components , maintenance work one o'clock into blind spots. Overhauling vertical turret tank, found that the piston seal "O" ring seal has been polished cylindrical , cylindrical piston also found substandard size requirements ( genus machine tool manufacturing reasons ) , the diameter direction is less than standard size 0.8mm, piston and cylinder body clearance large, causing vertical cylinder two chambers communicate channeling oil . Maintenance, and replacement of the piston passing "O" -ring after the die cutter machine troubleshooting. Analysis of the reasons cited in the profiling tool holder in place of the instantaneous line of the sword , the whole holder to receive a momentum F ', the force is decomposed F'1 a horizontal force acting on the cylinder piston rod longitudinal direction , at the same time , the solenoid valve 34E1-25B work turned vertical cylinder rod chamber pressure oil chamber connected rodless return oil control valve , the piston rod chamber by the force F by the two partially completed , one for F'1, the other is F1 = A1P1, where A1 is rodless chamber force area , then F = F'1 + F1. Under normal circumstances , the piston under the action of the force F rod chamber began to move , as incompressible hydraulic oil , hydraulic oil pressure rodless abrupt increase cavity to form a back pressure piston , the piston control valve according to the force balance it is set to go steady speed knife . The moment due % F'1 role in longitudinal cylinder chamber pressure P2 will be greater than P1. In practice, the two-chamber cylinder gap channeling due to the P2> P1 moments, hydraulic fluid from the high pressure zone with rod chamber rod chamber to the low pressure area flow trends , liquidity , once produced , P2 reduced , P1 rises , F1 increase large , unbalanced force piston , the piston driven turret quickly moves to the rod chamber . And moments later, the end result of profiling tool slide downward acting on the piston in the cylinder longitudinal horizontal thrust F'1 disappear on their own fast-moving piston end , take the knife stabilized turret , Fixed Length plastic seal red knife phenomenon ends.
Example 2: a CB3463-1 semi-automatic programmable hexagon turret lathes, during use , the emergence of the turret feed rate can not adjust the failure phenomenon , globe valve 2 is closed there is still crawling, pediment , and has been to bottom of the tank to stop the machine does not work properly .
Inspection and Maintenance : Inspect all hydraulic control components , especially the governor components have not found any problems. Replace some of the control valve , the failure persists . After dismantling the cylinder after the discovery piston "O" ring seal badly worn , so that the two chambers of hydraulic oil cylinder channeling each year. Analysis of the reasons , because "O" -ring wear, cylinder rod chamber and the rod chamber gap increases interoperability, when closing valve control valve 3 or 2:00 , it means cutting off the cylinder rod chamber oil return road. Theoretically , the pressure oil into the cylinder rod chamber when the piston is formed without a force F , the piston rod chamber to move the trend, as the cylinder rod chamber back to the oil off the rapid formation of the oil cavity back pressure , so that the force balance across the piston stationary , F a = F no time , no fluid pressure chamber due to the piston force different size and different, that is, P a > P no .
In practice, a gap is formed due to the two chambers communicate with each cylinder , the cylinder chamber with pressure oil from the high pressure region to the low flow area trends , mobile one generation,security seals a lower chamber pressure P , P without elevated ends of the thrust acting on the piston F No > F Yes, loss of balance piston rod chamber to move to find a new balance . And so forth, the piston has been moved to an external force barrier to stop. The phenomenon of the maintenance work to the machine brought great impact , replace the cylinder piston "O" ring seal , the machine fault elimination , running back to normal.

Industrial pump mechanical seal failure and these reasons

Vibration is too large
Mechanical seals vibration is too large , resulting in loss of seal. But the reasons for larger vibration mechanical seal mechanical seal itself is often not the cause , the other parts of the pump is the source of vibration , such as shaft design is unreasonable ,container seals processing reasons, lack of precision bearings , couplings parallelism poor, radial force and other reasons .
Pump cavitation causes
Since the unit and the pump inlet system operation unreasonable cavitation performance is not good, the high speed of the pump , the pump inlet localized cavitation , cavitation occurs, the water will bubble one hand, it will impact the mechanical seal faces an outer surface , so that the surface damage ; hand side anastomosis ring movement causes a flow membrane also contains bubbles can form a stable flow of film, resulting in movement of the ring fit surface friction, the mechanical seal device is damaged .
Lack of precision machining
Machining accuracy is not enough , there are many reasons , some precision mechanical seal itself is not enough, the reason for this is easy to arouse people's attention , but also easy to find. But sometimes the other components of the pump is not precision , the reason for this is not likely to cause people 's attention . For example: shaft , bushings ,security seals  pump, seal chamber to increase accuracy is not enough other reasons . The presence of these reasons, the sealing effect of the mechanical seal is very unfavorable .

Correctly handle automotive sealing problems

Automotive sealing strip (automobile rubber seal strip) is one of the important parts car , widely used in doors, windows , body , seats, sunroof, and other parts of the engine compartment and trunk , with a waterproof, sealing, noise , dust , frost , shock absorption , warmth and energy conservation an important role. It must have a strong tensile strength , good flexibility , but also good heat resistance and resistance to aging. In order to ensure the fastening strips and profiles , strips and profiles section structure dimensions must match .
Fix the sealing flange in the vehicle door , the seal should be noted that repair damaged flanges , flange accurately restore the original shape. To carry out the repair after the door seal inspection, the inspection method is: put a hard disk in a sealed position, shut the door , and then pull the paper , according to the Rally to determine the size seal is good . If the force required to pull the paper too much explanation sealed tight, this will affect the doors close properly , and also due to deformation of the seal over the Omo faster mourning for sealing performance ; if the force required to pull the paper too small , indicating bad seal doors wind does not often appear rain phenomenon. When replacing the door must pay attention to the inner and outer door panels in a new office painted folding plastic flange bite and put some punch hole left when the small craft with the base tape blocked .
In the repair of automotive line , should all body holes , holes worn harness ring is mounted at the place, not only because these seals from the seal, but also play a protective role in the harness . If the seal is damaged or harness can be rotated or ran seals , replace the metal security seals, and compares it with the body holes , hole assembly firmly secure the harness is good .
In the window glass is damaged , changing with the same curvature as the original glass window glass , while the glass to check the guide groove and seal for damage. Because windows often reply after repair is less than its original shape , therefore , when in addition to ensure easy pulling or lifting the window glass , but also pay attention to the window glass in the windows closed after four weeks of the seal.
In changing the roof , the roof should be in place around the lamination coated conductive sealant, after a good to be welded seams in the water tank and folding over the painted plastic , which not only helps the body seal , prevents the body due to more water to produce the weld flange early rust. Assembling the door when the door below the window paste an entire inner panel sealing barrier film , if not forming a seal barrier film , you can use ordinary plastic instead of paper , and then affix the seal spacer film compaction , and finally for interior panels production assembly .
When replacing the entire body , in addition to each of these projects should be completed outside , but also in the lap portion of the weld joints on both coated with sealant layer thickness should be about 1mm, and may not have virtual sticky layer , bubbles and other defects ; should be at the Flap Flap special plastic coated ; across the floor surface and the lower surface of the front cover should be coated 3mm-4mm elastic coatings and anti-corrosion coating ; on the floor surface and the front elevation to paste the plate surface noise, heat , vibration damping film , colored cable ties then covered insulation blankets block , and finally covered with carpets or fitted with decorative flooring. These measures can greatly enhance the sealing and the vehicle speed slows down corrosion of the body , but also can greatly enhance comfort.

Valve gasket damaged damaged bitter pit large tanker drivers

8 pm, Mengjin County Baihe Town territory Zhengsan Gong Lu Meng Road, near the buckle tanker spill occurred , but fortunately no casualties .
16:00 the day before , container seals a formaldehyde solution tanker transportation in Bangladesh village a big buckle road slope sections Mizoguchi leak , the county public security fire department rushed to the scene after the alarm .
Police on the scene saw the leaked formaldehyde solution to form a ditch along the roadside about 400 meters and a width of 1 meter trickle. In the relevant departments under the coordination of the car belongs transferred to another car company vehicle accidents within the formaldehyde solution pumped . Field staff to disclose rubbed salt formaldehyde solution and covered with mud after clearing, collection .
It is understood that the car is equipped with 10 tons of formaldehyde solution , because the tanker at the bottom of a valve gasket is damaged, resulting inside about 300 kg , containing 30% aqueous solution of formaldehyde leak. Formaldehyde is a kind of colorless gas with strong pungent odor , soluble in water , alcohol and ether .self-locking cable ties Formaldehyde is gaseous at room temperature , usually in the form of an aqueous solution .
Currently, the leaked scene disposal, the road returned to normal traffic .

Valve gasket damaged damaged bitter pit large tanker drivers

8 pm, Mengjin County Baihe Town territory Zhengsan Gong Lu Meng Road, near the buckle tanker spill occurred , but fortunately no casualties .
16:00 the day before , container seals a formaldehyde solution tanker transportation in Bangladesh village a big buckle road slope sections Mizoguchi leak , the county public security fire department rushed to the scene after the alarm .
Police on the scene saw the leaked formaldehyde solution to form a ditch along the roadside about 400 meters and a width of 1 meter trickle. In the relevant departments under the coordination of the car belongs transferred to another car company vehicle accidents within the formaldehyde solution pumped . Field staff to disclose rubbed salt formaldehyde solution and covered with mud after clearing, collection .
It is understood that the car is equipped with 10 tons of formaldehyde solution , because the tanker at the bottom of a valve gasket is damaged, resulting inside about 300 kg , containing 30% aqueous solution of formaldehyde leak. Formaldehyde is a kind of colorless gas with strong pungent odor , soluble in water , alcohol and ether .self-locking cable ties Formaldehyde is gaseous at room temperature , usually in the form of an aqueous solution .
Currently, the leaked scene disposal, the road returned to normal traffic .

New seals leak and cause analysis

Sometimes mechanical seal leakage , not due to leakage caused by face , but because ring, stationary ring seal or sleeve seal leak caused . For the following reasons :
Machine rubber seals leak
Actuating ring, stationary ring "O" type rubber seals, rubber finish is not enough because the hardness inappropriate , good elasticity , friction coefficient, geometry failure , heat resistance, corrosion resistance and other good reasons, often cause seal leakage .
Machine shaft seal ring in contact with leaking
When a sleeve repeated use in contact with ring seal and sleeve at the sleeve surface will have a rough grinding marks and spots , often caused by seal leakage . The main reasons are:
( 1) Since the rail car seals ring and the sleeve exists between the small amount of relative movement , or other hard abrasive grains embedded impurities into the softer seal . Produce a friction rub on the sleeve , and the sleeve surface without surface hardening treatment or processing of poor quality , resulting in wear and tear.
( 2 ) the result of friction rub , the metal surface passivation film sleeve damage present on the surface of the metal sleeve electrode potential difference , the formation of electrochemical corrosion. Also, because of the contact at the leak itself and in the micro crevice corrosion when they have the condition , therefore , the corrosion rate is higher . Furthermore , seal ring side in contact with the atmosphere , due to the presence of oxygen , more complex and harsh etching conditions , so wear marks and spots more obvious.
PTFE sealing ring group polytetramethylene used in the ring , due to the smaller coefficient of friction than the rubber , high finish , easy to move with the ring , thus , is better than the rubber seals . Rubber seals used in the stationary ring , due to good elasticity, low hardness, therefore , the reliability is better than the PTFE ring seal . Therefore, a reasonable choice of ring material is also very important, and we based on the specific circumstances of corrosion on the mechanical seal made ​​the following adjustments: the media side stationary ring with Teflon rings or rubber ring temperature corrosion in the atmosphere quiet side always use rubber ring ring ; ring PTFE seals are generally used , the effect is more ideal .
Bushings eliminate fretting , except try to use the sleeve surface hardness, good corrosion resistance, and maternal affinity, high surface finish of better spraying spraying materials and processes , but also pay attention when installing bushings wear, timely replacement of bushings, new security seals, in many ways to ensure sealing reliability.

Cycloid gear pump industry applications extended

Because nothing like cycloid gear involute gears meshing in the center distance separability , tooth profile curve equation is complex and engaging ordinary cycloid gear pump is a multi- point contact . Gang Here, cycloid gear machining high precision , small processing errors might prevent the assembly, or uneven loads .security tie Prior to the 1980s of last century by means of design calculations and processing technical limitations , cycloid gear pump application subject to certain restrictions. With the increased level of processing technology , especially the development of numerical control technology , cycloid gear machining accuracy gradually improved , the cost becomes lower , cycloid pump renewed attention .

Its application range with gradually expanded from general industrial extended to the field of micro-mechanical hydraulic systems and bio- engineering . With more teeth difference cycloid gear pump and the emergence of modern design and manufacturing technology development , research and cycloid gear pump by domestic and foreign scholars and producers attention. Recently, there are many foreign companies producing such a gear pump . It is understood that a large number of imports from abroad, air compressors, chillers, oxygen compressors, expanders , and a large number of chemical raw material conveyors often appear on the cycloid gear pump , especially in the chemical industry for delivering high-viscosity liquids on the device .trailer seals China also has many companies began producing teeth difference cycloid pump , but all in imitation of similar products abroad , mainly in order to meet the need for equipment maintenance .

Wear of the pump bearings and seals resistant to solutions

( A ) problem : support bearing severe wear . Try a number of different plant materials, such as carbon , graphite, Teflon ® material with fillers , trying to find a suitable solution to the problem of wear and misalignment , all materials 2-3 months to be scrapped . Wherein the polytetrafluoroethylene material products due to wear so that the shaft wear, have a great leak , causing mechanical seal failure.
Workaround: polyimide carbon fiber composite materials instead of the original use of a filler PTFE bearings.
Results: polyimide carbon fiber composite material support bearings installed, has been successfully operating for more than 13 months , after using the first eight months , the central part of the agitator is removed temporarily use other equipment , then , the staff detected stirrer bearings, found on each side leakage rate is less than 0.005 per inch , then the average failure interval time increased by 300% to 400%.
(B ) the problem : the axis deviation caused by high vibration and shorten the life of the mechanical security seals, while generating the noise .
Workaround: polyimide carbon fiber composite material with stainless steel impeller mouth ring pump housing orifice ring ; using our materials throat bushings instead of the original graphite bushings.
Result: reduced vibration amplitude , thus extending the service life of the seal and bearing life , and enhance the free operation of the pump . Many pumps are in use as a filler in packing , packing main role is to prevent leaks, but also play a role in the bearing , stable axis . At present, many pumps have packing to mechanical seals, mechanical seals with the changes did not affect the bearing , while the axis deviation ( high vibration and associated impacts ) has become a problem .
Polyimide carbon fiber composite materials to improve pump , successfully resolved the customer's problem , the following main points:
A ) polyimide carbon fiber composite material is a non- metal wear , do not bite material . This allows the running clearance out ( API provides only half the interstitial metal material ), the smaller the gap can stabilize shaft bush , the smaller the gap can further limit the leakage orifice ring and leak rate.
2 ) Polyimide carbon fiber composite material is a high strength , high performance thermoplastic material .pull tight seal It is easy to injection molding, can absorb vibration and shock , while the metal is being replaced will cause vibration and shaft wear .
Parts : Equipped with a removable Teflon seal and bearing sleeve

Model of the mechanical seal

In order to adapt to different working conditions , there are many different mechanical seal of the type :
1, according to the logarithm of the seal faces , into a single face , double face and other mechanical seal.
Single face - the sealing device in only one pair of seal faces . It is simple in structure , is commonly used mechanical seal type .
Double face - the sealing device has two end faces of the seal . Its complex structure, suitable for highly corrosive , flammable , toxic and harmful media and vacuum applications.
2, according to the role of the sealed fluid pressure in the sealed end face is unloading or unloading can be divided into balanced and unbalanced mechanical seal .
Balanced - sealed fluid pressure acting on the seal end face of the part or all of unloading unloading .
Unbalanced - the sealed fluid acting on the end surface of the sealing pressure is not unloading .
Balanced suitable for medium and high-pressure conditions of mechanical seals ; unbalanced voltage conditions applicable to the mechanical seal.
3, according to the spring is placed within a security stickers sealed fluid is divided into spring and spring built-in external mechanical seal.
Built-in spring - spring is placed within a sealed fluid .
External spring - spring placed outside the sealed fluid .
Spring built-in seal face stress state is good, small amount of leakage , cooling and lubrication is good. So, in addition to corrosive media , shall as far as possible using the built -in structure .
4, according to the number of springs compensation structure , divided into single and multi- spring type spring type mechanical seal .
Single spring - in only one spring compensation mechanism . It is used for lighting loads , shaft diameter smaller occasions .
Multi-spring - in the compensation mechanism has a plurality of springs . For the larger shaft diameter . Sealing end face spring force distribution is more uniform, but the spring wire diameter is small, a greater impact of corrosion on the spring .
5, according to whether the compensation mechanism rotates with the shaft is divided into rotary and stationary mechanical seal.
Rotary - compensating ring rotates with the shaft .
Static - compensation ring does not rotate with the shaft .
General mechanical rotary tamper evident label seal is often used , because the compensation mechanism and the shaft is simple in structure , small radial dimension . However, in high-speed conditions, compensation and other rotating parts ring centrifugal force generated greater impact , balancing high requirements , the use of static type is more appropriate.

New building materials polyurethane sealant application status

Sealant is a scene filling them , room temperature curing adhesive seams elastic sealing material , is nearly 10 years the rapid development of a new type of building materials, their industrialization encouraged and supported by the State . With modern urban architecture , architectural design and construction technology advances, decoration quality continues to improve, sealant construction and home decoration rapid growth in consumption , a strong impetus to the sealant industry. Especially in the 20th century , 90 years after sealant adhesive wall structure fitted with a structural material , the state "July" , "August " and " Nine Five" research program, have included insulating glass sealant , security ties construction high and low modulus silicone sealant, sealant production equipment and product standardization projects, the state and enterprises gradually increase investment in this area , to form a polyurethane , polysulfide , acrylic , silicone sealants and other emerging industries as the mainstay . At present, China sealant production reached 60,000 tons .
Polyurethane sealant used in construction of the current low price silicone sealant for construction, erosion has exposed concrete , oil leakage pollution, easy tear, you can not paint and other defects, particularly in the precast concrete panels and stone wall joints , airport, bridge concrete and glass fiber reinforced concrete construction and other structural joints watertight seal problem has become more prominent. Polyurethane sealant with tearing, abrasion resistance, puncture , the substrate does not pollute , acid and alkali resistance, organic solvents, paint , stone and concrete for non-corrosion properties , which stand out in the application . Polyurethane sealant has good prospects for development, with the gradual expansion of the construction market , the demand will gradually increase . In addition, polyurethane has a lively isocyanate groups , better cost performance can be modified development of new products. As long as the increased production of polyurethane sealant renovation investment, increase the development, promotion , and constantly develop marketable functional products , China's construction polyurethane sealant production will be substantial growth in recent years .
At present , China's construction sealant products have been adopted ISO11600 " structural sealant · · Classification and requirements " standard, raised 11 levels and the corresponding technical specifications ,tamper seal requirements and test methods , research and development should comply with the relevant sealant modulus and displacement capacity regulations. Polyurethane sealant must enhance their ability to innovate, develop new China already has a silicone sealant , polyurethane, polysulfide , acrylic sealant and other products in the future should be based primarily large enterprises or enterprise groups enhance product innovation, based on the existing stable quality, expand production scale, strengthen and new modified polymer sealant developed highly functional , improving product technology content and added value , promote the construction of new technological developments .

The valve sealing performance

Valves 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.
Sealing surface material and the processing status of the valve sealing performance of the sealing surface of the valve material and processing conditions have a significant impact leakage. 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.

Properties of the medium on the valve sealing performance of the liquid medium is substantially on the leakage of the viscosity determined by the sealing valve in the same, the various conditions are the same, the viscosity of the medium viscosity smaller than the much smaller leakage medium . Gases and liquids compared to the difference more obvious (except for saturated steam, saturated steam is easy to ensure the sealing surface).

Hydrophilic surface properties of the valve sealing surface of the leak amount of hydrophilic properties due to capillary effect. When the cable zip ties sealing surface as long as a thin film, the need to increase the pressure of the water through the gap. As the metal surface with good hydrophilicity, kerosene can easily penetrate the gap casting and sealing connection. So, in some of the most critical situations, is the use of kerosene for the hydraulic tightness test. Filling the cavities of kerosene tightness test method, equivalent to approximately 0.3? 0.4 MPa pressure tightness test under pressure.

The presence of the sealing film of the valve sealing performance of the sealing film exists between the sealing surface has a significant effect on its sealing performance. When the sealing film on the surface, the destruction of the contact surfaces hydrophilic, so that a larger pressure difference is required to make the medium passes through the pores. In addition, dense sealing film on the surface of the channel to plug the media travel, improve the connection sealing. In the use of film sealing should pay attention: When the work process film is reduced, should be able to recover the oil film thickness. Oils used in the valve being not soluble in the media, nor should evaporate, hardening or other chemical changes.

The closing member of the rigidity and structural features of the valve closure member sealing performance and structure of the rigidity is due to the elasticity of the part. The closed valve closure member is not absolutely rigid, but has a certain flexibility in the pressure of the medium, the size is changing, which force causes the sealing surface interactions. To compensate for these changes on the sealing performance of the closure member, the wire seal sealing surface preferably has a smaller rigidity of the elastic deformation is as large as possible.

BS asphalt elastic sealant stronger performance characteristics

SBS modified asphalt elastic sealant seal strap based thermoplastic elastomer SBS modified bitumen, add softeners, antioxidants and other additives, the use of second-order blending technology, uniformly mixed into the surface waterproof material.

SBS modified asphalt elastic sealant features: high flexibility, low modulus, elongation big, warm feeling small, UV resistance, lower prices and convenient construction, non-stick at, do not pollute the environment. SBS modified asphalt elastic sealant for buildings roofing, siding seams, waterproof seams underground construction, building repair cracks.
SBS modified asphalt elastic sealant high security bolt seals construction requirements are: using a torch or torches hot melt construction process, the construction of the sealant with grass while heating, drying the grassroots level to improve the adhesive force.

Manufacturing equipment and testing instruments there are new developments

Seals production equipment and detection technology is moving towards automation, low cost, high reliability direction.
In the rubber mixing equipment, with automatic batching and mixing process of automatic control mixer system, effectively to achieve energy efficiency, reduce environmental pollution, while manufacturing high quality rubber compound material. To improve the effectiveness and efficiency of mixing, research focused on the manufacturer mixer rotor shape. Kobe Steel Mill and Farley children developed 4WH rotor respectively and ST rotor mixer, Japan's Mitsubishi Heavy Industries developed GK-E rotor focused productivity.
Molding process, the foreign widely used and efficient, advanced and high-quality rubber injection molding processing technology. Production of small products, reciprocating screw injection machine, large size products with a screw plunger-type injection machine, are effective to improve the appearance of quality and performance seals, save raw materials. Paker produced O-ring, using the injection molding machine to make a small burr products, frozen with liquid nitrogen, trimming, trimming plastic pellets and water stone washed three processes, product appearance reached a very high level.
Vulcanization process equipment, at present, many domestic manufacturers equipped with a vacuum barrier seals tablet and injection machine, vulcanizing machine is also for ordinary circulating oil heating transformation, in order to ensure process stability.
While manufacturers also attach importance to design software secondary development, with good mold cavity materials processing flow analysis, manufacturing aspects of CNC equipment has been widely used precision molds, and the apparent quality have reached a very high level. Greatly promoted China's technological development rubber sealing industry.
Detection technology, the latest development is the use of an optical system, such as: Freudenbezy used by companies such KMK developed third generation of new optical system completely replaced the manual inspection, success will seal quality testing is fully integrated into the production process, which kinds of image processing systems to achieve a high detection speed and detection accuracy can detect the tiniest seal surface defects, such as cracks, bubbles, impurities and slip lines.
Domestic companies have introduced a seal measuring tension of the oil seal lip of the oil seal primarily on detection means for detecting pressure changes measured properties of the oil seal lip sealing gas detector (Italy), having a higher detection rate, per hour can be detected 1200-1800 a metal seals.
In the manufacturing process has been widely used CNC machine tools, professional mold manufacturing company has been basically achieved full CNC. Precision molds, and the apparent quality have reached a very high level. At present, the domestic rubber seals enterprises there are many companies equipped with CNC machining equipment, mold design and machining applications in CAD / CAM has accumulated a lot of experience.

Rubber water blocking ring Installation Considerations

Cylinder liner is a water-blocking circle "O" shaped rubber parts, mostly round cross-section, compared with the oil seal, simple structure, neither skeleton, nor self-tightening spring, relying on its own flexibility and rubber elasticity closed . If improperly installed, will make a lot of water jacket cooling water infiltrated the crankcase, causing oil deterioration, lubrication quality deterioration, increased engine wear of the moving parts, and even Burnt axle and other major faults, so when installing water blocking ring should note the following:
(1) If the water blocking ring seal tank too small or too cylinder, the water blocking ring into the seal groove for liner could not certain height above the curved surface, at this time, can be added at the bottom of the seal groove Apply one layer of asbestos rope, coated with water-resistant calcium-based grease, then blocking water trap seal into the groove, and then the body bore cylinder pressure on people.
(2) If the water blocking ring seal tank liner is too thick or too shallow, water blocking ring into the curved face up after too much time not only liner installation difficulties, but also squeeze squeeze even rotten bad rubber seal liner, rubber seal emery cloth evenly polished until it is loaded seal security seal labels tank after projection height appropriate date. Then grease the surface of the rubber ring can be pressed into the cylinder body bore.
(3) If uneven thickness or water blocking ring seal tank shades, rubber ring mounted on the cylinder liner protrusion height after coloring, you should carefully check the rubber ring problem, or seal tank problems, will be deposited problematic parts replaced.
(4) into the cylinder in the rubber blocking water trap seal tank before the rubber ring and meter seals tank should be cleaned, and in the installation into the dirt to avoid impurities. After the rubber ring mounted on the cylinder, carefully check whether there twisting muddy off slot and so on. Liner is installed, you should carefully remove the cylinder upper and lower bearing hole Korea on the dirt, and the next order of hole surface coated with oil, then slowly put pressure on people bearing hole liner.

The mechanical seal ring and stationary ring grinding

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

Spiral wound gasket with inner and outer applicable standards

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

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

PVC seal identification method

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