2015年8月30日星期日

Strange magnetism of graphite

I'm not suprised that a pencil attracts a magnet. Pure graphite can be made by heating carbon powder, but it comes from mines. I recall that pencil graphite is also hardened by mixing it with clay ...and the magnetic properties of carbon depend on impurities as well as upon the crystal structure. If graphite from a mine has enough paramagnetic contaminants (such as ferrite, like lodestone,) it will attract more than it repels.
On the other hand, are you sure that the pencil carbon is acting weird? Some paint pigments are paramagnetic and will weakly attract a magnet. To assure that it's carbon contamination which causes the attraction, use some wire cutters to snip the wood off the graphite rod, then experiment with just the graphite. Perhaps see if the remaining wood and paint will also attract or repel from a strong magnet.
As a science project you could also try using a blow torch and a fire brick to burn off the graphite to see how much other stuff is left behind. Pure carbon burns into CO2, but pencil leads should leave behind some ash which is possibly magnetic.
Now if you want some REALLY diamagnetic carbon, buy some pyrolytic graphite from a science hobby supplier. The repulsion effect is so strong that a small flake of graphite will hover in space above a strong magnet pole.

XRD Graphite Listed in Guangdong Financial Equity Trading Centre

In June 19,2015 which is a memorable day for XRD Graphite. XRD Graphite Manufacturing Co.,Ltd. officially listed in Guangdong Financial Equity Trading Centre.

Audit Committee reviewed equity dispute and Property disputes of Pingdingshan XRD Graphite Manufacturing Co., Ltd.Finally XRD graphite passed all the appraisal in various conditions and conform to list enterprise standard.

XRD Graphite listed in the center of the guangdong financial equity trading which is a significant milestone for our company. On the one hand,it make company funds diversified and greatly broaden the financing channels, on the other hand,it also plays a big role in enrich the company's funds and improve the company's management level to speed up the growth of the company.XRD Graphite achieved to go out and attract to company in the equity trading market. 

XRD Graphite improved the company reputation, influence, the important stage of enterprise brand by this listing in Guangdong Financial Equity Trading Centre.

2015年8月26日星期三

Considerations Of Graphite Crucible When Used

Graphite crucible has good thermal conductivity and high temperature resistance,when used at high temperature,it has certain strain resistance to thermal shock and quench.it also has excellent chemical stability,so it has strong corrosion resistance to acid and alkaline solution.it’s widely used in many industries.so it’s necessary to list the considerations of graphite crucible when used.
1、When Handled it should be light up light put,do not break the surface coating,avoid rolling by all means.
2、Stored in a dry environment,must not be affected with damp.
3、When Used for coke oven,it should be used crucible holder,crucible holder diameter should be slightly bigger than the bottom graphite crucible diameter,fully support the bottom of graphite crucible.
4、Shall not be tilted when inside furnace,top of the graphite curcible is not higher the furnace.between the furnace and the crucible,should be used wall brick,the wall brick is higher the crucible.the cover of the furnace should be on the furnace wall.
5、the coke briquette should be smaller than the spacing of furnace wall and the crucible,which is automatic fall,shall not be ramming.
6、The heat temperature of Graphite crucible need to up to 200℃ for 1-1.5 hours when used at the first time.then one hour up to 800℃,the baking time should not be too long.(first baked,graphite crucible should be rolled constantly,The temperature of the crucible should be slowly up inside and outside,up and down of the crucible,and shall not exceed 100 ℃,when it Stays cool,continues to heat up after water vapor discharges)
7、Furnace lining must keep in good condition,so it can focus the flame.
8、Adopt heating burner,flame should not be direct injection on the crucible,but the crucible holder.
9、Use The same crucible tongs when raised and  loaded.
10、When raised,broken material first then the metal ingot.But not too close and placed horizontally.avoid crucible cracked due to the metal expansion.
11、Better to continuous melting when graphite crucible startd to use,reduce the interval of time.
12、If Stoped in the middle time,The residual liquid should be all clear,avoid crucible cracked when used the next time.
13、In the process of smelting,The dosage of refining agent must be strictly controlled,if too much,it will reduce the life of graphite crucible accordingly.besides,Junction of ballastless must be cleared,which affects graphite crucible and triggers the broken of the upper crucible at the same time.

2015年8月20日星期四

Graphite Powder-The Application In New Energy Battery

Now the number of cars are increasing,gasoline price is more higher as followed.so people are starting to develop new energy vehicles instead of burning gasoline cars.a new energy battery can provide power for new energy vehicle,and in the new energy battery,graphite powder in the innovation of new energy car battery,which can speed up the new energy battery cars into the market fast.
Graphite powder is an important material in the new energy battery,but now the new energy vehicles have not reached practical purpose,they can only run within a short distance.Now researchers are researching new energy battery,which can make new energy cars more practical.In the new energy battery,the graphite powder is an important part because graphite powder has good electrical conductivity.graphite powder in the battery can be made into graphite conductive films,graphite anode materials and graphite conductive liquid,etc.Because the graphite powder has good electrical conductivity,the graphite powder has advantages of fast charging and discharging speed,big storage capacity etc in the battery.Now we has successfully trial-produced new energy car battery,which can be full of electricity in 15 minutes,the travel time and distance also has greatly improved.
The application and research of Graphite powder in new energy battery will continues,because there are many areas needed to improve.Graphite powder needs required further research and development,then the performance of battery that graphite powder further reforms. 

2015年8月13日星期四

The Applications Of Graphite Mould

Currently,graphite mould has been widely used in the following aspects:
1.Non-ferrous metal continuous casting graphite mould and semi-continuous casting graphite mould
In recent years,synthetic graphite is considered to be the most suitable material for continuous casting of nonferrous metals or semicontinuous casting mould.Production practice has proved that the adoption of graphite mould,which not only improve the casting speed, but also due to the size of the ingot casting precision,smooth surface,uniform crystal structure,it can be directly for the next working procedure of processing,all due to its good performance of thermal conductivity.This not only greatly improves the yield,reduce scrap loss,but also has greatly improve product quality.
Continuous casting method has vertical continuous casting method and horizontal continuous casting method.
2. The compression casting graphite mould
synthetic graphite material has been successfully used in non-ferrous metal pressure casting.for example,zinc alloy and copper alloy castings made by compression casting mold have been used to automobile parts,etc.
3. The centrifugal casting with graphite mould
Graphite mold has been successfully applied to the centrifugal casting.In order to prevent synthetic graphite mould of burning,we can take certain measures of anti-oxidation.After casting a certain numbers of castings,if found mold surface burned, we can expanded mold inner hole size so that used for casting large size casing.
4. Hot pressing graphite mould
synthetic graphite hot pressing mould used for cemented carbide pressure sintering has the following features:
If the suppress temperature is up to 1350-1450 degrees,the unit pressure can be dropped to 67-67 KGF/cm2 ,that's 1/10 of cold pressing pressure ;Secondly,the pressure and heat is in the same process.
5. Glass molding with graphite mould
Due to graphite material with chemical stability,it will not change the composition of the glass,graphite material thermal shock performance is good,and small size changes with the temperature characteristics,so in recent years it becomes indispensable materials in the glass manufacturing mould,it can be used to manufacture glass tube,pipe,funnel and other forms of special shape of glass bottle mould.
6. Sintering mould and other
little thermal deformation of synthetic graphite material,it can be made the transistor sintering mold and support,so it is now widely used,it has become the indispensable material in semiconductor industry.And graphite mould is also used in cast iron, the durability of various non-ferrous metalsmould, casting steel mould,refractory metals (titanium, zirconium, molybdenum, etc.) with mold and rail aluminothermic welding with welding type of mould, etc.
XRD Graphite Manufacturing Co.,Ltd----China Graphite Supplier And Graphite Machining,Graphite Manufacturer,Official Website:xrdcarbon.com

2015年8月11日星期二

How to Deal with Graphite Dust 2

In part one of this article, we touched briefly upon possible health effects of graphite dust and that the type of synthetic graphite used for electrodes does not particularly pose serious health implications as long as adequate dust collection is used. We also examined two types of dust collection systems and the proper air flow to achieve maximum dust evacuation. In this article, we will look at the flammability or explosive potential of graphite dust.

Controlling Dust 
When we think of controlling dust in the workplace we often consider how to reduce or eliminate the potential of inhaling dust particles to prevent health issues. Unfortunately, the consequences of a fire or explosion caused by accumulated dust in the workplace can be far greater.
Dust is an ever present condition in a manufacturing environment and generated by a myriad of processes that include production equipment, material handling and machining. The creation of this dust does not inevitably lead to safety and health risks if accumulation levels are kept within limits through effective housekeeping and dust collection practices. However, when excess amounts of dust are allowed to accumulate and then introduced to an ignition source, the results can be catastrophic.

Explosive Potential of Graphite Dust
Dust explosions in manufacturing plants over the past decade have certainly gained media attention as these tragic events resulted in needless loss of life and property. The devastation of these events also caught the attention of the Occupational Safety and Health Administration (OSHA).
In 2008, OSHA Directive CPL 03-00-008 was issued and states, “This directive contains policies and procedures for inspecting workplaces that create or handle combustible dusts. In some circumstances, these dusts may cause a deflagration, other fires, or an explosion.”¹ As a result of this directive, facilities that generate dust through a number of processes, including machining graphite, should conduct an assessment of their practices to determine the potential of a dust explosion and develop practices to lessen the probability of this occurring. The primary objective of this assessment is to identify if dust particles are combustible and in concentrations sufficient to ignite.
Combustible dust is identified as, "Any finely divided solid material that is 420 microns or smaller in diameter (material passing a U.S. No. 40 Standard Sieve) and presents a fire or explosion hazard when dispersed and ignited in air."² The elements of fire include fuel, oxygen and ignition. A dust fire or deflagration occurs when sufficient concentrations of fine particulates are suspended in air and then exposed to a source of ignition such as a spark or welding igniter. This ultimately results in the igniting or combustion of the dust.
In regard to a dust explosion, two additional elements are added. These are dispersion and confinement. If the dust is dispersed in sufficient volume or a dust fire is in a confined area, then the potential of this developing into an explosion is significantly increased. Controlling any one of these elements will essentially eliminate the potential of a dust explosion. To overcome the potential of a graphite dust explosion, the industry has primarily relied on controlling the element of fuel by removing dust at the source through effective vacuum systems. However, this does not minimize the need to address each element and determine practices to mitigate its contribution to an explosion.
In order to increase its effectiveness in controlling the dust and reducing the potential for a fire or explosion, all dust control equipment involved in handling graphite dust should have explosion relief vents, an explosion suppression system or an oxygen-deficient environment. Having adequate general ventilation is the first step and should be sufficient to also limit the employee exposure to airborne contaminants such as graphite dust particles.³

Explosibility Testing It is beyond the scope of this article to identify the full testing process in determining the explosive nature of graphite however; explosibility tests of graphite dust generated from the machining operations at a qualified laboratory were conducted.4 The results of this testing (see Table 1) will provide the customer with an indication of the explosibility for the graphite dust tested. However, due to variability in conditions, each customer will need to perform the explosibility testing for their conditions to have correct data to make a valid assessment of their activities.
The results of the laboratory tests indicate the graphite dust used in these tests are “hard- to-ignite” even with low moisture content and high concentration levels where 98.5% of the particles are less than 500 micron in size.
To reiterate, combustible dust is defined as a solid particle being 420 micron or smaller that can be ignited. In a shop environment, at the concentration levels of these tests the graphite dust would most likely be thick enough to hinder visibility. Therefore, the bottom line is that the potential of experiencing a graphite fire or explosion is minimal as long as good ventilation and sufficient dust collection is present, and effective cleaning and maintenance programs are utilized.
In some cases, additional information can be provided by the manufacturer. One possible source for information on combustibility is the Material Safety Data Sheet (MSDS) for the material. Hazard statements should be contained in each MSDS that identify if the material is a combustible product in its present form or a future transformed form. The MSDS will should also identify the exposure controls limits as well as the Hazardous Material Information System (HIMS) and National Fire Protection Agency (NFPA) rating. Contact your graphite supplier for a copy of the MSDS for your specific material.

SummaryAlthough the aforementioned tests conducted have shown graphite dust to be “hard-to-ignite,” this does not release companies from the responsibility of continual improvements in dealing with graphite dust. Recent times have seen the development of practices meant to improve the ability to identify an explosion risk. These practices often include safety monitoring equipment, improved dust collection systems and the implementation of an effective safety program that offers good housekeeping practices and an efficient preventive maintenance program.
While a dust fire or explosion cannot be completely eliminated, the use of these practices significantly reduces the possibility of this occurring. Being aware of the elements for a dust fire or explosion, knowing the explosive potential of the graphite dust and what resources are available for further information greatly improves the ability to identify potential risks and eliminate them before it is too late.

2015年8月10日星期一

Kinds of Graphite Machining Parts XRD Has

XRD Graphite Manufacturing Co.,Ltd are focused on producing, processing and selling various types of graphite products, including all kinds of graphite machined parts and components.
With the development of China graphite industry, diversiform types and specifications graphite machining parts are growing gradually. As a professional graphite machining enterprise, XRD Graphite keep pace with the times, we have many kinds of graphite machining parts for sale now.
However, how many kinds of graphite machining parts does XRD have? Let us discuss about it. The familiar machining parts are popular in XRD. Such as various continuous casting mould, diamond sintering mould, polycrystalline graphite parts, machining parts  for nuclear industry, non-ferrous smelting mould, electrical discharge machining mould, and other kinds of graphite hot zone parts.
Graphite parts for vacuum furnace are also the main machining parts in XRD. Graphite heating element, graphite connector, graphite nuts, graphite bolts, graphite spacers, graphite studs protectors, graphite plates and graphite trays for heat treatment and sintering jigs,etc.
Another important machining parts in XRD is graphite cookware, we have fixed customer in Japan and professional technology to machine the graphite to satisfy the customers requirements.
 
Otherwise, XRD Graphite can customized according to customer’s drawings requirements or sample and OEM for production.

2015年8月9日星期日

What are the challenges while machining Graphite?

Graphite machining can be challenging. Especially if you are not prepared to work with it's unique and messy properties.  As a custom graphite machining facility as well as a supplier of graphite material blanks, we have answered may customer questions over the years about the difficulty of machining graphite correctly. The following is  a list of five key concepts to keep in mind when attempting to successfully machine synthetic graphite.
First, synthetic graphite should be machined dry without the use of liquid coolants.  The use of coolants when working with graphite will produce an abrasive slurry when the coolant combines with the fine bits of graphite chips and dust.  The coolant fluid will also permeate the graphite material
through the open porosity of the material. Essentially the graphite will act as a sponge, as capillary action draws the coolant into the open pores.
This contamination will cause problems when the graphite is used in an application that requires the inert nature of the graphite material.
Second, the starting raw graphite material should be dry before machining.  If your raw material stock has been stored outside or been exposed to water it should be baked to drive out any excessive moisture.  The water and dust will make an abrasive slurry, which will dramatically reduce your tool life.  This issue can be most clearly observed when cutting wet graphite on a band-saw.  The dust does not exit the material during cut and packs up in the kerf. Essentially the cutting tool re-cuts the same graphite chips over and over again.
Thirdly, it is very important to have an adequate ventilation system to contain and vent the graphite dust and chips produced during the machining operations. Graphite dust is electrically conductive and will find its way into every crack or opening in a machine enclosure.  Static electricity will draw the dust to circuit boards and create short circuits when the build up bridges contacts. Machining graphite on a CNC machine that has not been specifically modified to handle the graphite dust can lead to expensive damage and potentially void a warranty.
Fourth, graphite machining should be done with very sharp tooling to prevent particle pull-out or edge chipping.  Once a cutting tool has lost its
sharp edge it will fracture the graphite material or cause a blowout of an edge when exiting a cut. This is because the dull tool is pushing and not
cutting the material.  Graphite has great compressive strength, but will fracture if the force is directed out of the material rather than into it.
Tooling made from micro-grain carbide designed for cast iron works well in graphite. Vapor deposition diamond coated endmills also work well, but
can be very expensive.
Fifth, it is a good practice when milling graphite to ''Climb Mill'' or work from the outside into the material.  When milling pockets avoid leaving
islands when the endmill cuts from the pocket perimeter into the center of a pocket.The island material will break out when the final island is
removed resulting in a pockmarked cavity.  It is a better practice to drill a center hole and mill the pocket from inside to the outer edge.

2015年8月6日星期四

The Principle Of TCGS In XiaoMi Mobile Phone

One Case Of Graphite Material Applications 
1、What's Graphite?
Graphite is the allotropes of the carbon,by covalent bond each carbon atom is surrounding link with the other three carbon atoms (in multiple hexagonal honeycomb to arrange),to be covalent molecules.because each carbon atom will emit an electron, the electrons can move freely,so graphite belongs to the conductive body.graphite can be refractory material.graphite can be conducting material.graphite can be wear-resistant and self-lubrication material.because of chemical stability,graphite can be made in heat exchanger,reactive tank,condenser,combustion tower,absorption tower,cooling unit,heating element.graphite can save much material if used in petrochemical industry,hydrometallurgy,Acid and alkali production etc.The graphite is used as part of the cell phone design,we can see a lot of useful things.For example,Thermal Conductivity Of Graphite Sheet(TCGS) is used in the current mobile phone which mainly is the use of the thermal conductivity of the graphite.
2、What's TCGS?
TCGS,Thermal Conductivity Of Graphite Sheet.
it Is a kind of new thermal heat and dissipation material,it has the unique grain orientation,along the two directions it has same thermal conductivity,the layered structure of the tablets can be well adapted to any surface,to improve the performance of consumer electronics when it is shielding the heat source and components at the same time.
because of the plasticity of graphite, we are able to design into TCGS.we can make graphite material to like a sticker sheet,and make it stick attached to the inside of the mobile phone circuit board.it can also cut off the materials contacts,but also it plays a role of anti-seismic effect.
3、Introduce The Heat Dissipation Principle Of XiaoMi Mobile Phone
In the conference of XiaoMi mobile phone,lei jun was solemnly declared to the cooling characteristic of the XiaoMi mobile phone,through it is not the first time that the TCGS used  in the mobile phone,but it is rare to promote as a advantage.
Here we try to introduce it simply:
one of the hot source in XiaoMi mobile phone is CPU and Flash chip,therefore on these chips encapsulation layer,it has a "7" type of TCGS,the other side of the radiator is inside of metal plate in the middle of the above.While another larger piece of TCGS is in the middle of the metal plate on the other side in XiaoMi mobile phone,it connects the back of the screen.
So,when the phone don't be open, we can see the back of the screen and CPU/Flash heat can pass through the middle of the metal layer,it eventually makes heat uniformly,and fianlly it's for cooling through the flow of air.So,we can say that part of the heat will go through the LCD side auxiliary cooling,in addition,the back cover of mobile phone can also be cooled.
Therefore,we can say, XiaoMi mobile phone of TCGS is actually playes the role of the heat conduction,and the even distribution of heat,indirectly, that is the cooling effect.
Article Sorted By XRD Graphite Manufacturing Co.,Ltd, One Top Class Of Graphite Suppliers .
More Details Click: xrdcarbon.com

2015年8月2日星期日

SPIRAL WOUND GASKETS

Lamons Spiral Wound gaskets are available in a variety of styles to suit the particular flange facing being utilized on the flanges.

Lamons Style W

A winding is made of alternate plies of a metal wire and a soft non-metallic filler. The metal wire in the gasket is preformed into a “chevron” configuration, allowing superior resiliency and self-adjustment when compared to conventional gaskets. The Style W is just a sealing component (winding) only, which is normally used on tongue and groove joints, male and female facings and groove to flat flange facings.

Lamons Style WR

Style WR gaskets consist of a winding with a solid metal outer guide ring. These gaskets can be used on plain flat face flanges and on raised face flanges. The outer guide ring serves to center the gasket properly in the flange joint, acts as an anti-blowout device, provides radial support for the Spiral Wound components, and acts as a compression gauge to prevent the Spiral Wound component from being crushed. Normally the outer guide rings are furnished in mild steel, but can be supplied in other metal when required by operating conditions.

Lamons Style WRI

Style WRI is identical to style WR, with the addition of an inner ring. The inner ring also serves several functions. Primarily, it provides radial support for the gasket on the I.D. to help prevent the occurrences of buckling or imploding. Its I.D. is normally sized slightly larger than the I.D. of the flange bore, minimizing turbulence in process flow. The inner rings are normally supplied in the same material as the spiral wound component. Lamons normally manufactures standard Style WR and WRI spiral wound gaskets to ASME B16.20, designed to suit ASME B16.5 and ASME B16.47 flanges.

SPECIALTY SPIRAL WOUND GASKETS

Lamons Inhibitor

Lamons Inhibitor gasket provides corrosion resistance in the most extreme conditions. It combines a HTG filler configuration with highest purity graphite, and a Kammpro inner ring laminated with soft PTFE material. The design of the Inhibitor gasket utilizes the Kammpro inner ring to provide the primary sealing interface. The inner ring material and its covering layer are inert in terms of corrosion through contact with dissimilar materials. This fire safe design incorporates the sealing integrity of highest purity graphite in conjunction with mica on the ID and OD, preventing the entrance of further corrosive conditions to the media.

Lamons Style WRI-LC

Style WRI-LC gaskets provide a seal at relatively lower seating stress. This means that our design requires less bolt load to seat, yet still has the recovery like a standard spiral wound. The WRI-LC gasket is typical to 150# and 300# class flanges, where users have a concern with insufficient potential of pre-load. But, the density of the WRI-LC gasket can be varied to meet virtually any requirement. Electronic controls on Lamons' SpiraSeal machines assure high quality precision welding with equal spacing, the correct number of metal plies on the gasket inside periphery, proper ratio of metal to filler, proper number of metal plies on the outside and spot welds on the O.D.

Lamons Style WRI-LP

Designed for highly corrosive environments, Style WRI-LP is a Spiral Wound gasket with a conventional outer guide ring and a "Kammpro" style LP-1 inner ring. This dual sealing design engages the raised face completely from the O.D. to the bore. The winding can be constructed with the required metal and soft filler specified by the user. The "Kammpro" inner ring metal can be ordered in any alloy, such as Monel, or in Carbon Steel. A Carbon Steel inner ring can be given a protective PTFE coating for increased chemical resistance. The Kammpro inner ring is faced typically with either 0.020" thick EPTFE or graphite. The WRI-LP has seen wide-spread approvals for HF Acid service, although this design has much further potential. Its main advantages are: no metal contact with the media; chemical resistance; fire safe design; sizing to meet ASME B16.5; available in large diameter and special flanges.

Lamons Style WRI-HTG

Style WRI-HTG gaskets combine the corrosion and oxidation resistance of mica with the "sealability" of flexible graphite. The mica material, in conjunction with the metal spirals serves as a barrier between oxidizing process conditions and/or external air and the graphite. While Inconel X-750 is commonly selected as the winding metal, any alloy can be selected. The overall effective rating of the HTG configuration can go to a MAX of 1500°F.

Lamons Style WR-AB

Inward buckling of Spiral Wound gaskets is sometimes a concern in industry today. Work is ongoing through various industry committees to improve the standard in this regard. Some end users do not want to use inner rings due to cost - to address this stance, Lamons offers Style WR-AB. By creating a space for expansion between the O.D. of the winding and the outer ring, the buckling along the inside could be reduced. This feature, combined with a reinforced inside circumference, help to further reduce the likelihood of inward buckling after installation.

Lamons Style WRI-HF

This gasket was developed for HF acid applications. It consists of a Monel and PTFE winding with a carbon steel centering ring and a PTFE inner ring. The carbon steel outer ring can be coated with special H.F. acid detecting paint if desired. The PTFE inner ring reduces corrosion to the flanges between the bore of the pipe and the I.D. of the spiral wound sealing element.

Lamons Style WRI-RJ

The style WRI-RJ gasket is identical to a Style WR in construction features but is specially sized to be used as a replacement gasket for flanges machined to accept oval or octagonal ring joint gaskets. The sealing component is located between the I.D. of the groove machined in the flange and the flange bore. These are intended to be used as replacement parts and are considered a maintenance item. In new construction, where Spiral Wound gaskets are intended to be used, raised face flanges should be utilized.
WRI-RJ

POPULAR SPIRAL WOUND GASKET APPLICATIONS

Lamons Style MW & MWC

These gaskets are available in round, obround, and oval shapes and are used for standard manhole cover plates. When Spiral Wound manhole gaskets with a straight side are required, it is necessary that some curvature be allowable, given to the fact that Spiral Wound gaskets are wrapped under tension and therefore tend to buckle inward when the gaskets are removed from the winding mandrel. As a rule of thumb, the ratio of the long I.D. to the short I.D. should not exceed 3 to 1.

Lamons Style H

Style H gaskets are for use on boiler handhold and tubecap assemblies. They are available in round, square, rectangular, diamond, obround, oval and pear shapes. Lamons has tooling available for manufacturing most of the standard handhold and tubecap sizes of the various boiler manufacturers. However, these are also available in special sizes and shapes. (To order special gaskets, dimensional drawings or sample cover plates should be provided in order to assure proper fit.)

Lamons Style WP or WRP

These gaskets are similar to Style W and Style WR, with the addition of pass partitions for use with shell and tube heat exchangers. Partitions are normally supplied as double-jacketed construction, made of the same material as the spiral wound component. The partition strips can be soft soldered, tack welded or silver soldered to the spiral wound component. The double-jacketed partition strips are normally slightly thinner than the spiral wound component in order to minimize the bolt loading required to properly seat the gasket.

Lamons Style L

The spiral wound components of Style L are identical to those of Style W and in addition have a wire loop welded to the outer periphery of the gasket, sized so as to fit over diametrically opposite bolts, for proper centering of the spiral wound component on the gasket seating surface. Whenever possible, it is recommended that a Style WR gasket be used in lieu of a Style L gasket because of the obvious advantages of the outer solid metal gauge ring. The Style L is considerably more difficult to produce than the Style WR and therefore more expensive.

Sorted By XRD Graphite Manufacturing Co.,Ltd,More Details: Visit Here