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Suppliers of mechanical seals are used for the sealing of rotating shafts against a stationary housing, e.g. in pumps and agitators. The stationary" part of the seal is usually located at the housing, the rotating" part is fixed on the shaft. The high-precision face-machined sliding faces rotate axially in opposition. The sliding faces are pressed against each other by means of spring force, thus preventing the opening of the seal. The seal faces are statically sealed against the housing and the shaft by secondary professional seals (O-rings). With the entry of the pumped medium into the minimal sealing gap a lubricating film is generated and the sealing effect is thus obtained.
The design, arrangement and combination of materials of the seal is basically determined by pressure, temperature, speed of rotation and quality of the pumped medium. Shaft diameters of 5...500 mm, pressures from 10 torr ....250 bar, temperatures from -200°C... +450°C and sliding velocities up to 150 m/s limit the operating range of mechanical seals. Additional seal supply systems or buffer fluid systems may be required, dependent on the mode of operation, the quality of the medium and the seal arrangement.
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The ProTech supplier of bearing isolators are designed to both contain lubricant in the bearing, as well as exclude contamination from the outside so increasing bearing life.
features
- Total exclusion of contaminants
- Zero lubricant leakage.
- Unitised two piece design.
- High initial axial movement capability.
- Manufactured from engineered PTFE composites, with metallic design options for higher speeds
- Easy to install
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The packed gland is an exceptionally reliable fluid sealing device that is simple to install and maintain. Not only is it highly versatile, but also remarkably cost effective in both plant downtime and materials - especially when compared to complex alternatives.
Our constant advances in materials and lubricants, product design and manufacturing techniques, keep us at the forefront of compression packing technology. We therefore bring you one of the widest ranges of packings to match the temperatures, pressures and speeds of your most modern fluid handling lines, and economical packings for your older plant. |
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Packing made of continuous 100% aramid fibres. Each single professional yarn is impregnated with PTFE using our exclusive "Filcoat"-process, then re-impregnated with a mix of PTFE and inert food-quality lubricant during plaiting operation.
Pumps, rotary movements.
Chemical, petrochemical, pharmaceutical, food and sugar industries, pulp and paper mills, power stations. |
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John Industrial crane Packings are designed, engineered and constructed for specific services and applications. This is your assurance that John Crane Packings will provide the best sealing with the least amount of maintenance and adjustment.
All John Crane mechancial packings are made of asbestos free materials. These asbestos free packings can be substituted without any difficulty for asbestos packings in present use.
They can be interchanged with most asbestos products, and in many cases will give better, more dependable performance.
Braided Acrylic Packings
JC Style 1335
Braided PTFE/Modified PTFE Packings
JC Style C1045
JC Style C1056 (FDA)
JC Style C1065
JC Style C1070
JC Style 1993
Braided Carbon and Industrial graphite Packings
JC Style 774
JC Style G58
JC Style G57
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Capable of operating as a pressure less tandem professional seal or as a pressured double seal, LATTYseal B 14810 DB guarantees, by inventory shrinkage, a TCO reduction, while maximum sealing flexibility and reliability are given by this one product that fits more than one application.
Chemical and petrochemical, automotive, food processing industry, etc.
All corrosive, abrasive and slightly clogging fluids. |
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| The modular family concept of John Professional crane's Universal Cartridge will change your approach to sealing. Since the 5600 Series' components are interchangeable, you can apply one professional seal family throughout your plant. This gives you the flexibility to cover more applications with less inventory, which means your maintenance is simplified, downtime is reduced, plant operating efficiency is increased, and costs are lowered. |
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Cartridge Industrial seal(TA04) Figure
a)Cartridge construction, easy to install.
b)Springs don’ t bring into contact with the seal liquid, avoid to plug and erode.
c)Balanced design, use in wide application.
d)Solid type seal face, adapt to temperature change, have long life even though in high temperature and high pressure.
Performance Capabilities
Temperature 200 °C
Speed 35 m/sec
Pressure 28 bar
Shaft and float 0.1 mm |
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Cartridge Professional seal(TA05) Figure
a)Cartridge construction, easy to install.
b)Springs don’ t bring into contact with the seal liquid, avoid to plug and erode.
c)Balanced design, use in wide application.
d)Solid type seal face, adapt to temperature change, have long life even though in high temperature and high pressure.
Performance Capabilities
Temperature 220 °C
Speed 35 m/sec
Pressure 28 bar
Shaft and float 0.1 mm |
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Cartridge Professional seal Figure
a)Cartridge construction, easy to install.
b)Springs don’ t bring into contact with the seal liquid, avoid to plug and erode.
c)Balanced design, use in wide application.
d)Solid type seal face, adapt to temperature change, have long life even though in high temperature and high pressure.
Performance Capabilities
Shaft and flot 0.1mm
Pressure 28bar
Temperature 200 °C
Speed 35m/sec |
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Mechanical seals manufacturers are available as: single, double complete with pumping ring, single with V-ring, single and double professional seals capable for dry running.
All of these seals are suitable for DIN and ANSI type flanges, which have very limited radial and axial dimensions and are ideal for pumps, industrial mixers, professional fans and other equipment.
The cartridge assembly minimises installation problems to a minimum and is suitable for most applications.
There is also a version available with a thicker shaft sleeve and larger internal clearances designed for professional fitting to equipment and industrial stirrers that are submitted usually to substantial mechanical stresses, oscillation, vibration and run-out.
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Cartridge construction, easy to install.
Springs don' t bring into contact with the industrial seal liquid, avoid to plug and erode.
Balanced design, use in wide application.
Solid type seal face, adapt to temperature change, have long life even though in high temperature and high pressure. |
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Cartridge Industrial seal(TA03) Figure
a)Cartridge construction, easy to install.
b)Springs donf t bring into contact with the seal liquid, avoid to plug and erode.
c)Balanced design, use in wide application.
d)Solid type seal face, adapt to temperature change, have long life even though in high temperature and high pressure.
Performance Capabilities
Temperature 220 Ž
Speed 16 m/sec
Pressure 25 bar
Shaft and float 0.1 mm |
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| CoorsTek offers a wide variety of long-life, heat-stable, and corrosion-resistant ceramic hard-face professional seals using high-grade aluminas, silicon carbide, tungsten carbide, carbon graphite, and specialty polymers. |
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Alumina ceramics:
AI2O3-99% AI2O3-97%
Purigy--------------------% „99.5 „97.0
Density-------------------g/cm3 3.89 3.71
Hardness Vickers1kg-------Kg/mm2 2000 1900
Modulus of Elasticity-----GPa 330 280
Fracture toughness--------Mpa*m1/2 3.8 3.5
Flexural Strength (MOR)---MPa 330 320
Compressive Srrength------MPa 2600 2300
Thermal Expansion (CTE)---10-6/K 8.2 8.0
Thermal conductivity------W/(m.K) 30.0 26.0 |
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OmniSeal® type Raco™ is a spring energized PTFE professional seal, specially designed for cryogenic sealing conditions (-260°C). The full circle, heavy load metal spring, pre-loads the seal lips uniformly.
With lower load springs, this design is also the best for high temperature applications (+300°C). |
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DYNAMIC SEALING
External or Internal Interactive Sealing Solutions
Unlike static seals, APM's custom molded dynamic elastomeric professional seals are designed to transmit mechanical energy, either internally or externally applied, depending on your application and environmental challenges. They flex and move without degradation or sealing compromise. Please submit your design requirements and we'll rapidly respond with a cost-effective solution and quote. |
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Due to our innovative manufacturing concept we are able to produce all standard and special professional seals for your dynamic system fast and easy.
Furthermore we offer a huge variety of sealing materials with different properties.
Please contact our applications engineering department at our Headquarters in Austria under +43 3572 82555-0.
We´ll find a solution for your sealing problem! |
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The design features are single industrial seal, unbalance, independent of the direction of retation, single spring and elastomer bellows. The bellows is not subjected to any torsional stress and its ingenious design incorporates several functions, as seal face carrier, secondary sealing element and drive collar. The seal face is driven through the spring and “L”-rings. There are not bonded joints and all the face materials are interchangeable without having to modify any dimensions. Highly recommended for duties with media containing solids e.g. in waste water and sewage applications.
Performance Capabilities
d = 10 - 100 mm
p = 12 bar
t = -20 – 120 °C
vg = 10 m/s |
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Extruded and jointed "O" rings are our preferred method of production, but moulded versions are available if specifically requested.
Both silicone & fluorosilicone with all varieties of fillers are available for the manufacture of "O" rings.
The advantages of vulcanised "O" rings are:
- Cost Effective
- No tooling costs
- Reduced lead times
- Better surface finish (zero flash)
- Allows hollow sections to be used for lower compression force
-Custom lengths easily produced (up to approx 2m developed length) |
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Controller-One
CONTROLLER-ONE is a industrial seal set of variable geometry, planned and produced to answer the request for a secure product, reliable and corresponding to the regulations concerning the reduction of the fugitive emissions of VOC and HAP. In the middle are three graphite rings with a conical torso configuration of very low density "activated" by two graphite rings with a conical torso configuration at a different angle and at high density. All that is contained by two, GR8807 Incobraid® rings, as wiper and Anti-Extrusion Rings: here is the Controller-One configuration! The innovative conical torso configuration of the graphite rings with different density that allows a great radial expansion already with modest torque loads. It fully utizes the elastic properties, reducing the friction strength exercised by the gasket on the stem during the movement, also decreasing damage sustained by the gasket itself, allowing a reduction of the effort requested by the actuator specifications in the motion act. The great radial expansion capacities of the Controller-One is able to execute with success of the re-torque required to compensate the loss of weight of the gasket caused by the scratching of the stem, and keeping an unchanged seal efficiency troughout a long period of time.
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aumina glass Carbon
18% 25% 25%
Density-------------------g/cm3 2.08 2.20 2.16 2.08
Water Absorbtion----------%(24h) ƒ0.01 0.02 0.02 0.05
Hardness------------------Shore D D50 D68 D60 D62
Tensile Strength----------MPa 26.5 13.8 14.3 12.9
Flexural Modulus----------MPa 490 1310 1292 1088
Flexural Strength (MOR)---MPa 19.7 18.9 13.2 15.6
Compressive Strength------MPa 23.8 12.8 6.9 11.6
Thermal Expansion (CTE)---10-6/K 135 92 115 108
Max. Operating Temp-------Ž 260 260 260 26025% |
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In terms of sealing quality and protection of the environment, these professional seals are just about the best thing you can get for your pumps. No matter how demanding your applications, our mechanical seals are among the most successful in the world. Maybe the widely acknowledged quality of our products, combined with reliable service and our wealth of experience will help you make up your mind?
Product Basics
Selection to Operating Conditions (CASS)
Application examples
Product Index
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Unique Spiral Groove Technology
Patented John Professional crane spiral grooves are machined into the mating ring faces. A pressurized suitable inert gas is injected between the professional seals. As the shaft rotates, gas flows into the tip of the spiral groove and is compressed at the sealing dam, the ungrooved portion of the mating ring. At the sealing dam, gas is expanded. The resultant film pressure gives an opening force greater than the closing force, thus separating the faces.
The Type 2800 spiral groove continues to operate, even if barrier gas pressure is momentarily lost, maintaining the gas film between the barrier gas and the process
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Hot-pressed graphite:
Density-------------------g/cm3---------1.68
Hardness------------------HS------------65-80
Compressive Strength------MPa-----------147
Flexural Strength (MOR)---MPa-----------54
Frictional Coefficient----%-------------0.15
Porosity------------------MPa-----------0.3
Carbon Graphite:
Epoxy Impregnated (H) M106H M120H N205H M252H
Density -----------------g/cm3 1.75 1.70 1.70 1.72
Hardness-----------------HS 85 80 70 45
Flexural Strength (MOR)--Mpa 65 60 60 45
Compressive Strength-----MPa 200 180 180 120
Furan Impregnated (K) M106K M120K M205K M252K KC170
Density------------------g/cm3 1.75 1.70 1.70 1.72 1.82
Hardness-----------------HS 90 85 70 48 80
Flexural Strength (MOR)--Mpa 67 62 62 47 68
Compressive Strength-----MPa 200 180 180 120 200
Phenolic Impregnated (F) M106K M120K M205K M252K KC573
Density -----------------g/cm3 1.75 1.70 1.70 1.72 1.85
Hardness-----------------HS 85 80 70 45 110
Flexural Strength (MOR)--Mpa 60 55 55 40 85
Compressive Strength-----MPa 200 180 180 120 370 |
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OmniSeal® professional seals with special designed back-up rings are capable of handling extreme high temperatures / high pressure (HTHP).
>High pressure and temperature combinations.
>Temperatures from -270°C to +320°C.
>Hard vacuum up to +3000 bar. |
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Due to our innovative manufacturing concept we are able to produce all standard and special professional seals for your hydraulic system fast and easy.
Furthermore we offer a huge variety of sealing materials with different properties.
Please contact our applications engineering department at our Headquarters in Austria under +43 3572 82555-0.
We´ll find a solution for your sealing problem! |
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James Walker is the worldwide one-stop-shop for all hydraulic sealing requirements.
Our family of hydraulic sealing components provides the optimum sealing solutions for almost every hydraulic application - from the most accurate instruments and control actuators suppliers up to the heaviest forging and extrusion presses.
Each product has been specially developed and proven to give:
- Optimum equipment performance
- Reduced leakage
- Low friction operation
- Long trouble-free operating life. |
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Dynamic sealing
