carbon mechanical seal manufacturer

At ROC Carbon, we’re pleased to manufacture carbon/graphite mechanical seal faces from your drawings or samples, using the same high-quality materials and tolerances that are found in original equipment manufacturer parts. As experienced mechanical face seal manufacturers, our team at ROC is experienced in machining intricate details such as flow channels and ports. Our lapping capabilities encompass both carbon and hard faces up to 16 inches in diameter and to as flat as 1 helium light band. We can insert the carbon seals in metal housings (machined by us or furnished by you) by heat shrink fitting or by using specialty high-temperature adhesives.

St. Marys Carbon custom manufactures a variety of seals grades to suit any application. We offer blank stock, various impregnations and have the capability to machine intricate seals with polished faces. All of our seals, from the blending of raw materials to the finished product, are made in-house by our specialized craftsmen

As St. Marys Carbon is one of the few companies to make each and every product from the initial mixing of the carbon grades to the time it is shipped to our customers, each of our seals can be custom-manufactured to your specific requirements. We will individually work with you to find the right grade and design for your seals to optimize sealing performance and extend your equipment’s uptime.

Used primarily for banding round cable, Flat Seal BAND-FAST allows for consistent location banding on cable and casing. The short, flat seal is ideal for the lowest profile downhole applications.

... unique challenge for bearing protection. As the carbon rings containing the steam wear, high temperature / high velocity steam travels down the shaft directly at the bearing seal.

The high-performance shaft seal RotaSeal KD-3 is an economic shaft seal. Because of its modular system, the single parts can be assembled according to the various ...

... 22mm Rotary Ring Carbon (Graphite/SiC/TC) Stationary Ring (SiC/TC) Bellows Other Parts(VION/SUS304/SUS316) GFK suitable pump CR,CRI,CRN 1,3,5 CR,CRI,CRN 10,15,20 CR,CRN 32,45,64,90 C...

Custom manufacturer of seals made from materials such as Buna-N, fluorocarbon, Viton®, silicone, neoprene, EPDM and polyurethane. Types includes oil, grease, rotary shaft, hydraulic, pneumatic, V, lip, wiper, U-packing and end cap VK high pressure seals. Available in variety of styles and sizes. Capabilities include die cutting, water jet cutting, rubber molding and extrusion. Value added services such as material selection, reverse engineering, design assistance, part identification, inventory management, stocking program, packaging, kit assembly and quality control offered. Prototype and short to large run production. Suitable for automotive, gearboxes, pumps, casters, electric motors, transmissions, rolling mills, compressors, engines, agitators and crank shaft applications. Meets ASTM standards. FDA approved. On-time delivery.

Distributor of a line of mechanical replacement seals that are dimensionally & functionally equivalent to the seals from original equipment manufacturers. Crane types 1 & 2 specifications include withstanding temperatures ranging from -40 F to 400 F & pressure at 425 PSI. Crane type 1B specifications include withstanding temperatures ranging from -40 F to 400F & pressure at 1200 PSI. Crane type 21 available with ability to withstand temperatures ranging from -40 F to 400 F & pressure at 150 PSI. Burgmann M2, M3 available with ability to withstand temperatures ranging from -4 F to 250 F & pressure at 145 PSI. Burgmann MG1 available temperatures ranging from -4 F to 250 F & pressure ranging from -75 F to 450 F. Metal bellows seals withstanding temperatures -75 F to 450 F & pressure at 300 PSI.

Eaton offers a diverse line of  mechanical seals and sealing components, including pressure-balanced face seals, circumferential segmented seals, brush seals and welded metal bellows seals. We also specialize in hydrodynamic designs for face and circumferential seals that significantly improve performance. We can custom-design and fabricate the exact seal for your needs.

GRAPHITAR carbon is an ideal material for use as a sliding face within a mechanical seal configuration, operating successfully against counterfaces in materials such as Silicon Carbide , Tungsten Carbide and other ceramics. GRAPHITAR is a very hard material and extremely resistant to wear. It is lubricated by most fluids so that the medium being sealed can serve as the seal lubricant. GRAPHITAR’s permeability can be controlled to allow the lubricating medium to be metered to the sealing surface or to be impervious and fully “Leak Tight” to 6 BAR pressure of nitrogen.

Seal faces can be manufactured as fully machined components, lapped to 3 light bands, as semi finished parts or as finished parts pressed to size parts.

Meccanotecnica Umbra is acarbon mechanical seals manufacturer,marketed all over the world. The company was founded over 50 years ago in Italy and is located in Campello sul Clitunno, a small town located in Umbria, between Assisi and Spoleto, and within it works a highly trained staff, who constantly strives to offer quality items to customers, as well as excellent technical assistance.

The mechanical seals are made with various materials including carbon, metals, elastomers, and ceramics. Each of these materials plays an important role in the effectiveness of the seal and the selection of the correct materials remains a fundamental step for the effective application of a mechanical seal. The use of this material, furthermore, has allowed Meccanotecnica Umbra to establish itself internationally as a manufacturer of a wide range of carbon mechanical seals and to meet the needs of companies that, for example, operate in the mining sector or in the automotive.

Thanks to a constant improvement in staff training and in the technologies used, Meccanotecnica Umbra is known for being a manufacturer of efficient carbon mechanical seals. In fact, using the company"s mechanical seals will give you the opportunity to obtain advantages concerning, for example, the following aspects:

If you need to get more details about the manufacturer of carbon mechanical seals, enter the contact section and fill out the form you will find inside. In a very short time, an expert member of the company staff will be happy to provide a detailed answer to all your questions.

Our extensive portfolio of high-performance materials, our leading machining expertise, and our application engineering advice make us one of the most important partners in the sealing industry worldwide. Our customers can rely on specifically designed materials with high reliability and long service life. Even under the most adverse conditions, our solutions reliably deliver top performance - also thanks to outstanding dimensional accuracy and surface quality that is precisely matched to the application in question. Our experts support OEMs" design departments for greater safety in material selection and design.

Our stable and proven materials for your sealing rings are the guarantee for more safety. A safety that is further enhanced by our decades of experience on the market and our application know-how. Benefit from a longer service life for your solutions, longer service intervals, and lower maintenance and repair costs. We are your materials specialist when it comes to making your product reliable and durable.

Our customers are at home in a wide variety of industries. Whether it"s drinking water, chemicals, refineries, power plants, food, pharmaceuticals, or aviation - our materials, processing and consulting expertise has the same goal in each of these areas: the perfect choice of material for a first-class shaft seal. To ensure that our products may also be used in the various applications, our materials naturally have all the necessary certificates and approvals from the relevant legislators, authorities, and insurance companies.

Carbon Graphite Seal Rings has the advantage of excellent corrosion resistance, self lubricity, high coefficient of heat conductivity. in addition resin impregnated carbon has low permeability and good thermal conductivity

Carbon graphite seal rings or faces are typically molded to a rough shape before being impregnated with resin or metal binder Carbon fill with metal/antimony carbon seal faces or rings are especially subject to corrosion but a suitableresin filled carbon seal faces or rings can usually be found for most services. Carbon graphite seal faces or rings are not recommended for aqua regia, oleum or perchloric acid. Resin-impregnated carbon seal rings or faces in common use are attacked by lithium hydroxide, potassium hydroxide, sodium metophosphate, anhydrous ammonia, sodium diphosphate and sodium cyanide. A metal filled carbon graphite seal face or ring is generally better in strength, hardness and modulus of elasticity than resin filled carbon graphite seal faces or rings.

Mechanical seals serve an important purpose—to seal fluid within a vessel where a rotating shaft passes through a housing. The engineering that goes into mechanical seal design can be complex. Since mechanical seals must be able to endure a wide range of application conditions, they must be designed with meticulous attention to detail. One of the boundary conditions some mechanical seals face is a lack of lubrication in the contacting interface between the sealing faces. Some application conditions have limited or intermittent lubrication available while others may have no lubrication whatsoever.

In these instances, seal face material selection is critical. Over many decades, carbon/graphite material grades have been developed to withstand some of the harshest dry running conditions, including high speeds and high temperatures. This article delves into some of the science behind the development of these carbon/graphite grades and the considerations that must be taken into account when selecting seal face materials for dry running applications.

In order to understand how carbon/graphite materials are being developed to withstand harsher conditions, it is important to get a fundamental knowledge of how carbon/graphite self-lubricates. Carbon/graphite’s self-lubrication is attributable to its molecular structure. Plain carbon graphite consists of graphite grains bound together by strong amorphous carbon. While the amorphous carbon provides much of the material’s strength, it is the graphite grains that allow the material to self-lubricate.

Graphite grains have a layered structure comprised of strong graphene layers stacked on top of each other, bonded by weak van der Waals forces between the layers. These layers slide over each other when rubbing occurs. This sliding action is the basis of carbon/graphite’s self-lubricating ability.

On a macroscopic scale, this action results in a burnished film being deposited on the mating surface against which the carbon/graphite runs. Thus, the carbon/graphite is able to effectively fill in the surface roughness of the counter face and run against a graphite film as opposed to the counter face itself. This is critical in dry running conditions, where there is no fluid lubrication to mitigate the harmful effects of friction.

Two important considerations that must be taken into account when selecting a counter face are surface finish and hardness. The burnished film deposited by carbon/graphite can only be so thick. If this thickness is less than that of the counter face’s surface roughness, a burnished film will not be sustained and the carbon/graphite will wear rapidly. It is typically recommended that the counter face roughness is 16 µ·inch (0.4 micrometer [μm]) or less. Having a sufficiently hard counter face is also important. If the hardness is too low, the counter face could score, the burnished film may not be sustained, and leak paths can form.

Graphite grains are the key to carbon/graphite’s self-lubricating ability. Thus, by increasing the graphite content in a seal face, its dry running abilities can be augmented. Carbon/graphite manufacturers are able to do this using a process called graphitization. During this process, carbon graphite is heated in a controlled atmosphere to temperatures greater than 4,000 F for an extended period of time. During this time, amorphous carbon reorganizes into the graphene-layered graphite matrix. This material is now referred to as electrographite, or graphite for short.

There are a number of benefits to using graphite for dry running seal faces over carbon graphite. In addition to improved self-lubrication in dry running conditions, graphite has improved thermal properties. After graphitization, temperature resistance in oxidizing conditions can increase by more than 200 F (110 C), which is crucial in high-temperature applications. On top of this, graphite’s thermal conductivity is greater than five times that of carbon graphite. In high-speed applications, this helps to facilitate heat dissipation away from the sealing interface where frictional heat is typically generated. Coupled with graphite’s low coefficient of friction, its high-thermal conductivity considerably reduces excessive heat buildup at the sealing interface, which can ultimately deteriorate the seal face, coke hydrocarbons and introduce leak paths.

There are certain restrictions when it comes to using graphite over carbon graphite. When amorphous carbon is converted to graphite, the material becomes softer and loses some of its strength. This can be problematic in high-load applications where hardness and strength of the seal face are key properties. In certain high-speed applications, flexure of the seal face must be minimized, so the stiffness of carbon graphite is often preferred over graphite. Regardless, it is always best to consult with a carbon/graphite manufacturer when determining the proper material grade for a specific application.

Plain graphite and plain carbon graphite are porous as a result of the initial baking process. During this process, molded “green” carbon/graphite components (i.e., graphite powders held together by a pitch binder) are baked in a controlled atmosphere baking oven. This causes pitch to be converted into amorphous carbon, forming plain carbon graphite. Noncarbon elements outgas from within the material as it is baked, which results in an interconnected network of porosity.

IMAGE 2: Carbon exists in three forms in nature—diamond, graphite and amorphous carbon. Diamond: Four bonded valence electrons. Highly ordered lattice structure.  Graphite: Three bonded valence electrons. Strong graphene layers bound together by weak van der Waals forces. Amorphous Carbon: Two bonded valence electrons. Strong “entanglement” of carbons.

Carbon/graphite manufacturers take advantage of this porosity by filling it with various impregnation materials, including metals, resins and even carbon. The type of impregnation used has a considerable effect on the ultimate physical properties of the material. As a result, it is important to carefully select the impregnation type to ensure optimal performance in a specific application.

Salt impregnations have other benefits as well. In addition to fortifying graphite’s burnished film, salts can help limit oxidation at high temperatures. They do so by bonding to active sites within the material that would otherwise react with oxygen at high temperatures and be driven away from the material in the form of carbon dioxide. By blocking these active sites and limiting oxidation, salt impregnations can increase temperature resistance of seal faces by more than 100 F (55 C).

Graphitization and salt impregnations have enabled carbon/graphite manufacturers to produce material grades that can withstand incredibly harsh dry running conditions. However, even with these advancements, there are some mechanical seal environments that are so dry that even these highly engineered grades cannot properly self-lubricate. This is because carbon/graphite requires some small amount of moisture in the environment for self-lubrication to take place.

A basic rule of thumb that can indicate whether the use of moly grades may be necessary is the dew point of the sealing environment—if the dew point is less than -30 F (-35 C), the atmosphere is likely so dry that molybdenum disulfide-based grades are the only feasible seal face material option. This can occur in seals used in deep space exploration, dry mixer seals, vacuum seals, nitrogen-purged dry gas seals, etc.

Carbon/graphite manufacturers are putting a large focus on developing advanced processing techniques that enhance the dry running ability of their materials. As more extreme mechanical sealing applications are developed, the materials used in these applications must be developed at the same rate.

We invite your suggestions for article topics as well as questions on sealing issues so we can better respond to the needs of the industry. Please direct your suggestions and questions to sealingsensequestions@fluidsealing.com.

Mechanical face seals are a complex combination of materials and design that form a system whose prime objective is maintaining the integrity of the pumping system, keeping what is inside where it belongs and preventing contamination from the outside.

These systems enable relative motion between stationary and rotating components while simultaneously accommodating some level of axial or radial movement. The technology that has been developed and implemented in these systems has become so reliable that mechanical seals are often taken for granted. The vast majority of failures of mechanical seals can be attributed to the system in which the seal is installed, not the seal itself.

One of the materials used in many mechanical seal systems is based on the fourth most common element and the basis of all life—carbon. This article will explore how this common element plays such a critical role in these complex systems.

Because mechanical sealing systems must maintain tightly controlled contact between one rotating and one stationary face, interface stability must be maintained across a potentially wide spectrum of conditions. Face flatness is critical and is measured in millionths of an inch; unexpected distortion will change the interface dynamics significantly. With the proximity of the two face materials, contact is inevitable and the materials must be able to operate with some level of self-lubricity so they do not damage each other, which would create a path across that interface that enables system leakage.

There are eight allotropes of the carbon element (see Figure 1), based on how the carbon molecules align in the lattice, that result in a range of properties from the softest version, graphite (often used in pencil “lead”) through amorphous carbon to diamond, the hardest material known to man.

Each company creates a unique recipe intended to address specific conditions that maintain the interface stability; from low temperatures (cryogenic), to water, to methane, to oil, to higher temperatures and beyond, materials exist to provide the needed capability. These materials are designed for specific conditions. One recipe cannot perform in every condition, and seal companies work with material manufacturers to provide the optimum candidate for the application.

Figure 3 shows the variation in physical properties, thermal conductivity and chemical resistance of the part according to the relative amount of carbon and graphite in the finished product.

The attributes of the allotropes, or the various forms of carbon, can be combined in specific ratios and leveraged to achieve desired responses in a system where there is relative motion between two components in terms of friction and wear, (a.k.a. tribology), along with a large temperature range and the need for corrosion resistance. Carbon is an ideal seal face material for the range of conditions within a mechanical sealing system, and is widely used.

In the same way a pencil transfers graphite to a piece of paper, mechanical carbon can transfer material to the mating face—the level of that transfer is where the technology comes into play.

Manufacturers of carbon-based materials for mechanical seal faces achieve specific tribology through formulation of different elemental forms of the carbon atom and the use of other proprietary elements. Processing these recipes results in a structure that is literally held together by atomic carbon bonds.

A mechanical seal’s mating pair is the heart of the system and the two components are designed to work together. There exist optimum pairs for specific conditions.

The components of the recipe enable the proper tribology—too much or too little film transfer would result in shortened life or performance of the mechanical seal.

Carbon is also a critical component in some of the hard face materials used in mechanical seals because it combines with metals at high temperatures to form metallic carbides. These materials include tungsten carbide and silicon carbide.

These carbides provide superior hardness and stiffness. They are not self-lubricating and therefore cannot run “dry,” but they run well against mechanical carbons.

We invite your suggestions for article topics as well as questions on sealing issues so we can better respond to the needs of the industry. Please direct your suggestions and questions to sealingsensequestions@fluidsealing.com.

As already mentioned, carbon graphite has features well suited for the use as a seal ring. Seal ring grades have markedly high resistance to wear and corrosion,

Machined seal rings are used for high loading, sealing pressures of above 100bar and speed over 50 m/s. All dimensions of rings are available for closed tolerances.

Stein Seal Company has an immediate opening for an Machine Operator that will be responsible for monitoring the overnight testing of mechanical seals. Night shift hours are 10:00 PM to 6:30 AM, Monday through Friday 10% shift differential bonus applies for...

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Stein Seal is a growing seal manufacturing company that is seeking a candidate that will be assembling and inspecting parts received, finished parts and work in process to ensure conformance with work orders, drawing specifications and customer requirements. ...

Stein Seal is a growing Manufacturing company in the Aerospace Industry. We are hiring for multiple CNC Operator - Non-Metal associates Must be available for 1st or 2nd shift 1st shift: 7am-3:30 2nd shift: M-T 5:30p-2am F: 3:30p-12am Accountabilities:  Knowledge of...

Stein Seal Company has an immediate opening for a Mechanical Technician in our Engineering Test Lab that will be responsible for the setup of machinery for, and to carry out the functional testing of mechanical seals as described by the test plan. Also, to assist the...

Stein Seal is looking for great people!! Where our team members enjoy what they do and enjoy where they work!! Stein Seal is an Aerospace seal Manufacturer who believes in training and developing their team to further advance their career as well as working in a very...

Our Merida, Mexico division Seal and Metal Products is searching for a Hands-on individual needed to oversee and supervise the manufacturing of precision aircraft engine components at our Mexico facility.  Candidate will be responsible for directing and supervising a...

Stein Seal Company India is seeking a Human Resources Manager to join our plant in Bangalore. The Human Resources manager originates and leads Human Resources practices and objectives that will provide an employee-oriented; high performance culture that emphasizes...

Stein Seal Company India is seeking an Accounting Manager to join our team in Bangalore, India! This person will oversee & provide accountability of all financial information, maintain the company’s general ledger accounts and provide monthly and annual financial...

Manual Machinist – Manufacturing   Stein Seal is GROWING!!! Are you serious about your trade? What’s the future prospect for your career & company? If these issues matter to you, current and long-term projected growth has created openings for experienced...