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One of the types of seals that CHO specialise in is cassette type seals where the primary function is to protect the bearing from ingress of grit, dirt, water, etc. These are primarily used in dirty environments where experience has proven that standard seals are not upto the job. Typical applications are:
- agricultural tractors
- heavy duty trucks and trailers
- quarry and mining equipment
CHO have many styles and sizes available for the above industries, but are constantly manufacture new styles and sizes.
CHO have just introduced a "patent pending" axle seal for the US Heavy duty truck and trailer market.
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CHO, or CHU Hung or seal co. Ltd have been producnig oil seals since 1988, and have now over 20,000 tooled parts covering over 700 styles. CHO supply oil seals to both OEM's and aftermarket customers all over the world from standard type seals to custom designed seals such as cassette seals and PTFE seals.
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CHO have been designing and manufacturing PTFE Rotary shaft seals for over 20 years, for applications ranging from large diesel engines to Racing Cars, and serve both OEM and aftermarket requirements.
CHO are the only sealing company that offer all 3 styles of PTFE seal construction, these being, moulded, clamped and crimped. As we are not constrained to a particular style, like most companies are, we can offer the best technical and commercial solution to suit your application and quantities.
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Mink AD-System (AD) – the innovative solution for sealing shafts
The Mink AD-System consists of a specially designed brush ring to seal shafts and to prevent coolants, swarf and mists from escaping. In addition the barrier effect created by the flexible bristles prevents the spread of lubricants, for example.
Three different ring sizes enable fitting to shaft diameters ranging from 10mm to 100mm.
The brush ring and the bristles are made from black nylon which has good resistance to chemicals and is suitable for a wide temperature range from - 40 to + 80°C.
Benefits:
• A flexible sealing also when oscillation or vibration occurs
• A reliable barrier is created
• Three fixing holes enable an immediate and quick assembly
• Quick delivery, attractive prices
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Valve stem seals are used to seal the inlet and outlet valves of internal combusion engines. CHO have many tyles and sizes avalavble to suit most common engines.
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OmniSeal® type Raco™ is a spring energized PTFE 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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Timken offers an extensive line of sealing solutions. These seals are used in a full range of equipment for thousands of applications such as manufacturing, off-highway, power transmission and oil refineries. Our industrial seals are made from innovative materials and processes that enhance life and performance in many industrial applications. Timken industrial seals are backed by the company's experienced technical support and distribution networks, giving distributors a single source for a wide range of bearings and value-added extras to keep bearings running optimally.
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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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OmniSeal® 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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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 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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Seal Science designs and manufactures rod seals, piston seals, wipers, scrapers, and sealing systems for industrial hydraulic actuators and valves. These include the range from O-Rings and Urethane U-Cups to PTFE/O-Ring combinations and Spring Seals.
Our engineers are experienced and sensitive to the needs of industrial systems.....such as assuring adequate lubrication with, while providing a dry rod; a constraint that impact wiper and secondary seal choices. Also, dealing with the wear and slip-stick problems associated with long stroke applications is routine for us. See our PolyKingª and PolySpring™ catalog for a wide range of standard hydraulic seals.
We also furnish hydraulic seals for metric and JIS applications. Let us assist you to choose the right seal for your hydraulic actuators...or the right seal to replace costly or non-performing competitor components. Call Seal Science, your one-stop source. Phone, fax, or e-mail us your requirements.
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Competitively priced seals for rotary shafts
- Suitable for many plant and machinery duties.
- Full range of designs for different working environments.
- Choice of elastomeric lip materials and metal casings.
- All standard shaft sizes included.
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Metal-O-rings and C-rings for extreme operating conditions
From ultrahigh vacuum up to 6800 bar (100000 psi) pressure and temperatures from -269°C cryogenic up to +980°C (-425°F up to 1800°F).
Resistant to chemicals to a large extent.
GFD metal O-rings have been developed as a secure sealing of gases and liquids. They even can be used in case of extreme conditions. These static and metallic sealing elements can be applied in ranges of ultrahigh vacuum and up to a pressure of 6800 bar. They are suitable in case of continous temperatures from 269 degrees centigrade below zero up to 980 degrees centigrade above zero and resistant to radioactive radiation, chlorides, corrosion and other aggressive influences. They neither age in use or during storage.
Advantages:
With conventional flanged joints many technical data, from which only very few are precisely available during the design state, have to be known for the calculation. Also the values for the rigidity of the flange, the screws etc. have to be available. The consequence are extensive calculations with imprecise or assumed values and the involved disadvantages. There is always a defined initial tension, no setting and smaller flange and screw dimensions with the GFD metal-O-rings or lip seals. The proof has not to be furnished with complicated and difficult calculations about unknown quantities but simply by adding the forces of pressure to the operating pressures.
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O-Rings Seals in standard and metric dimensions and different compounds always available ex stock.
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Our seven million stocked 'O' rings include inch sizes and metric sizes to a range of international, national and industry standards.
These are held in a variety of general and high performance elastomers to suit the vast majority of industrial and specialist oil and gas sector applications.
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- Featuring Simriz proprietary perfluoroelastomers
- In-house tool shop
- Clean room molding and packaging
- Off-the-shelf availability from Simrit warehouse
- Tooled on all AS568a sizes and most standard metric sizes
- Compression and injection molding
- Cryogenic and punch trim deflashing
- Facility locations: Santa Ana, CA; LaGrange, GA; Cuautla, Mexico Tokyo, Japan; Pinerolo, Italy
- Certifications: ISO 9001, ISO 9002, QS-9000, AS-9000, BQMS/ D1-9000, A2LA Laboratory, EN9100, VDA 6.1
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O-rings are a Seal Science specialty. Utilizing advanced material science, SSI provides O-ring solutions in many types of elastomeric/ rubber compounds. SSI incorporates advanced materials in its design methodology ranging from Perfluoroelastomers to alloy filled conductives elastomers.
SSI utilizes on-site molding making capabilities to provide molded O-rings from .030” inches OD to over 40.0 inches. SSI has the capability for performance molding of O-rings with ultra critical measurement tolerances, as well as providing less critical, economically costed, high volume supply alternatives.
Seal Science incorporated finite element analysis (FEA) in its O-ring design to develop the most optimal size seal for an application.
SSI has a complete compound development capability to provide O-rings made from current off-the-shelf (COTS), and custom engineered elastomers made from the following:
- Silicones
- Fluorosilicones
- Isoprene
- Nitriles (Lubricated and High Strength)
- Conductive Elastomers
- Perfluoroelastomers
- Styrene-Butadiene (SBR)
- Ethylene acrylic
- Aflas®
- Butyl
- Chloroprene (Neoprene®)
- Ethylene Propylene (EPDM)
- Fluorocarbon GLT & GFLT
- Fluoroelastomers (Viton®)
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* Lionsele® P - for pistons :
- Compact seal with low levels of dynamic and breakout friction.
- Instant response to pressure plus low power consumption.
- Maximum operating pressure: 400bar.
- Maximum surface speed: 5m/s.
* Solosele® G - for rams, rods, glands & pistons :
- Compact and robust single-element seal.
- Excellent performance at high or low pressures.
- Flexible chamfered lips for high integrity sealing.
- Maximum operating pressure: 420bar.
- Maximum surface speed: 0.5m/s.
* Solosele® S - for pistons :
- Robust double-acting seal.
- Fully moulded one-piece design with integral
anti-extrusion element for long life.
- Maximum operating pressure: 420bar.
- Maximum surface speed: 0.5m/s.
* Twinset - for rods, glands & pistons :
- For older plant with up-stroking/gravity return rams.
- Traditional sizes ranges readily available.
- More advanced designs are now recommended for most Twinset duties.
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Bal Seal offers numerous designs and materials uniquely suitable for a wider range of reciprocating applications.
Canted-coil spring energized seals provide high performance and long seal life.
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We manufacture wide ranges of sealing components for hydraulic and pneumatic applications from engineering plastics, including:
- U rings
- Back-up rings
- Cup seals
- Wipers
- Vee packs
- Double-acting and single-acting fluid seals.
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Seal Science designs , machines, and molds pneumatic seals for static, reciprocating and rotary applications. It's quite possible that one of the designs in our PolyKing™ catalog will meet your needs.
Pneumatic actuation systems are attractive due to their light weight, non-flammable, and clean characteristics.
Seal Science understands the special nature of pneumatic seal design and application. This includes consideration of permeability, lubrication requirements, exclusion of foreign matter, and the concern to avoid explosive decompression. Let Seal Science help you with your pneumatic seals. Call, fax, or e-mail us for a rapid recommendation and competitive quote.
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These seals are designed to operate with tube testing machines that repeatedly seal and release the steel tube ends as part of the hydrostatic testing process. The quality of the seals used is a crucial factor in the reliability of such machines, and therefore our tube test seals offer the highest levels of performance.
Manufactured from high tensile, impact resistant polyurethane, they provide excellent wear resistance and can operature at high or low pressures. They incorporate a special lip profile to enable tube entry without seal damage.
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- Dedicated manufacturing facilities
- Quick quote ability
- Multiple material colors
- Banded piston technology
- Global manufacturing
- Small lot manufacturing
- Custom material compounding
- Facility locations : Troy, OH; Findlay, OH
- Certifications: ISO 9001, ISO 9002, QS-9000
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The requirement for low coefficients of friction, less than .08, temperatures ranging from -300F to +550F, pressures in excess of 5000 psi, the need to seal a corrosive acid .....These are the typical kinds of factors that tell you that an elastomeric seal probably wont fit your application.
Seal Science PTFE or Teflon® Seals and Seal Science Perflex perfluoroelastomer are often the answer. Possibly something as simple as a PTFE O-Ring, or a PTFE compound cap to protect the elastomer will do. Or maybe, spring energized PTFE U-Cups, like those in our Polyspring line might be needed.
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Canted-coil™ spring energized seals provide high performance and long seal life.
Bal Seal offers numerous designs and materials uniquely suitable for a wider range of reciprocating applications.
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OmniLip™ and DynaLip© seals are PTFE-based rotary lip seals. These seals are used in pumps and compressors, engine crankshafts, robotics, diesel engines, pharmaceutical and food processing, blowers, mixers, heavy industry and steel mill applications.
>Sizes to DIN3760 dimensions.
>Low friction, long life.
>Up to 3 meter diameter.
>To suit specific industry needs.
>Broad chemical compatibility.
>Temperature: -50°C up to +200°C.
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The new generation of GFD-rotary shaft lip seals were especially developed for use under difficult and extreme conditions.
The superior properties of PTFE as lip material combined with a corrosion resistant stainless steel housing provide the particular advantages of these GFD-rotary shaft seals.
Advantages and applications:
- Temperature range from -70°C to +260°C
- Lowest friction and power draw
- Long seal life because of wear resistant lip materials
- Almost universal chemical resistance (depending on lip material)
- Suitable for dry running and poorly lubricated conditions
- High shaft speed up to 36 m/s
- Exchangeable with standard lip seals according to DIN 3760
- For food or pharmaceutical industry
Applications:
- Chemical processing equipment
- Hydraulic motors
- Compressors
- Shafts on gearboxes
- Rotary
- Blowers
- Ventilators
- Actuators
- Rotary unions
- Encoders
- Mixers and Dryers
- Robotics
- Milling-machines
- Pumps of all kinds
- Pharmaceutical and food processing equipment
- Centrifugal machines
- Engines and Compressors crankshaft
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The requirement for low coefficients of friction, less than .08, temperatures ranging from -300F to +550F, pressures in excess of 5000 psi, the need to seal a corrosive acid .....These are the typical kinds of factors that tell you that an elastomeric seal probably wont fit your application.
Seal Science Teflon® Seals and Seal Science Perflex perfluoroelastomer are often the answer. Possibly something as simple as a Teflon O-Ring, or a Teflon compound cap to protect the elastomer will do. Or maybe, spring energized Teflon U-Cups, like those in our Polyspring line might be needed. Many of the possible solutions can be found in our Polyking catalog. Whatever the appropriate choice may be, our Teflon engineers will be able to quickly offer you a recommendation and a quote. Check our how competitive we can be!
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Bal Seal offers several families of rotary seals suitable for a wide range of temperature and pressure/velocity (pv) applications. Seal solutions include flange seal, insert seals, and seals with metal locking devices.
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Shaft seals with PTFE sealing lip
are primarily used for sealing rotary shafts
Highlights
Outstanding chemical resistance against aggressive media
suitable for high temperature ranges between –60° and +220°C
suitable also for use under low-lube or dry operating conditions
Typical Applications
screw-type compressors
centrifugal devices
meat cutters
fans/blowers
mixers
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