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METBEL Metal Bellows Mechanical Seals |
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Written by Peter
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Saturday, 25 July 2009 04:23 |
| MR800 - Low-cost Heavy Duty Mechanical Seals be used for general purpose for all industries. It can replace most model of single coil spring, multiple spring and wave spring mechanical seal. Metal bellows is made from SS316L so it is a low-cost metal bellows mechanical seal but high performance, robust design and reliable for general applications. It is the most popular metal bellows type mechanical seal.
|  | MR700 -Corrosion Resistant Mechanical Seals be used for all extreme corrosive chemical application. All parts, including bellows, are made of HASTELLOY® C-276*. MR70 mechanical seal has excellent resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, hot contaminated media (organic and inorganic), chlorine, formic and acetic acids, acetic an-hydride, seawater and flue gas desulfurization systems. |  | MR760 - Abrasion Resistant Mechanical Seals be used for abrasive and corrosive media applications. Metal bellows is made of AM350. AM 350 is a semi-austentic precipitation hardenable stainless steel. It is capable of high strength and hardness after heat treatment. It is produced with high melt cleanliness for improved mechanical properties and resistance to fatigue failure. It also has good weldability. |  | MR900 - High Temperature High Strength Mechanical Seals be used for high temperature application such as refinery, petrochemical and chemical industries. Due to its narrow seal cross section design, it can replace most type of seal that using in most ANSI pumps. Secondary seal are made of graphite foil that can withstand high temperature up to +425 degree C. Bellows is made of INCONEL® 718** or AM350. | 
| MS4 - High Temperature High Speed Mechanical Seals is designed to have bellows as stationary seal so it can accommodate high range of shaft speed. It can be used at shaft peripheral speed up to 50 m/s. Bellows can be made of INCONEL® 718** or AM350. |  | MR6 - High Temperature Positive Drive Mechanical Seals has more or less the same design as MR9 but positive drive lug is add to provide positive drive that suitable for thermosetting or viscous media applications. It help to extend mechanical seal service life by absorbing excessive torque. Bellows can be made of INCONEL® 718** or AM350. |
*HASTELLOY® is a registered trademark of Haynes International, Inc. **INCONEL® is a registered trademark of Special Metals Corporation.
Advantages of Welded Metal Bellows Mechanical Seals Mechanical Seals with Edge Welded Metal Bellows design has several obvious advantages compared to pusher or elastomer bellows design. Some of them are as follows:
- Dynamic o-ring is eliminated. Superior performance, no hang up or shaft fretting.
- Hydraulically balanced seal. Allows seal to handle more pressure without heat building up.
- Self cleaning. Centrifugal force throws solids away from seal.
- Fits small seal envelope.
- Available in metric and imperial sizes.
- Bellows spring design allows 360 degrees even face closing force.
- Various choices of seal face, elastomer and metal materials to suit demanding applications.
- Solid single piece construction. METBEL believe in Edge Welded Metal Bellows mechanical seals’ future and have dedicated our resources to promote and develop design to cope with customer’s demanding application. Please go to our Product page to explore our metal bellows that suitable to your application. In case you have any questions, suggestions, comments or can not find what you are looking for, please feel free to contact us. We will reply in next business day. |
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Last Updated ( Monday, 28 June 2010 08:50 )
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