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Metal Bellow Seal US MBG/US MBVT

Metal Bellow Seal US MBG/US MBVT is a very robust and reliable sealing solution for demanding industrial applications. These seals are engineered with a flexible, corrosion-resistant metal bellow, with no need for dynamic O-rings, ensuring that the performance is always consistent under any pressure and temperature conditions. Excellent resistance to thermal shocks and reduction in wear assure longer service life of equipment.

Ideal for handling a wide range of fluids, including corrosive chemicals, high-temperature liquids, and slurry mixtures, these seals are perfect for pumps, mixers, compressors, and agitators in industries such as chemical processing, oil & gas, and power generation. The US MBG model is designed for general applications, whereas the US MBVT variant is specifically designed for high-temperature and vacuum conditions.

With precision engineering and superior material quality, the US MBG/US MBVT seals provide unmatched reliability, improving operational efficiency while lowering maintenance costs.

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Key Features

Inherently balanced
No shaft fretting
Fits on ANSI, ISO & DIN pumps
Available in AM350, Hast-C & Inconel
Alloy-20 construction
Convertible to cartridge design

Operating Range

Pressure : Upto 20kg
Size: 25mm to 100mm
Temperature : US MBVT (-70°C to 200°C), US MBG (-70°C to 350°C)
Speed : 2900 rpm

Materials

Metal Parts For US MBG : SS316, Hast-C
Metal Parts For US MBVT : SS316, Carp-42
Bellows For US MBG : Hast-C, Inconel, AM-350
Bellows For US MB VT: Inconel, AM-350
Elastomers For US MBVT : Viton, EPR, PTFE, FFKM, STV, GFT, FEP
Elastomers For US MBG : Flexible Graphite
Rotary Face : SiC, TC, Carbon
Stationary Face : SiC, TC

Products FAQ`s

1. What are mechanical seals and why are they important?

Mechanical seals prevent leakage of liquids or gases between a rotating shaft and a stationary housing in equipment such as pumps, compressors, and mixers. They help maintain process efficiency, reduce maintenance costs, and protect equipment from contamination or fluid loss.

2. What type of applications are US-TB and US-TBR mechanical seals used for?

US-TB and US-TBR seals are designed for handling highly corrosive and chemically aggressive fluids. They are commonly used in chemical processing plants, fertilizer industries, acid handling systems, and pumps operating with reactive or corrosive media.

3. What is the difference between US-TB and US-TBR mechanical seals?

The US-TB seal features a replaceable rotary seal face, allowing easier maintenance and replacement. The US-TBR version uses an integral rotary face design, providing a compact structure suitable for certain corrosive applications.

4. What materials are used in US-TB / TBR mechanical seals?

These seals are manufactured using chemically resistant materials such as PTFE and GFT composite bellows, Silicon Carbide, Ceramic, Carbon, and corrosion-resistant metals like SS316 and Hastelloy C.

5. What operating conditions can these seals handle?

US-TB / TBR mechanical seals are designed for shaft sizes from 19 mm to 100 mm, temperatures from −45°C to 120°C, and speeds up to 2900 rpm, depending on application requirements.

6. Are these mechanical seals suitable for corrosive chemicals?

Yes. The seals are specifically designed for extremely corrosive environments. The use of PTFE based bellows and chemically inert materials makes them suitable for acids, salts, oxidizing agents, and reactive organic compounds.

7. Can these seals be customized for specific equipment?

Yes. Unique Seal Engineering Co. provides customization based on shaft size, operating pressure, temperature, and process fluid to ensure proper sealing performance for different industrial applications.

8. How can I request a quote or technical assistance?

You can request a quote by submitting the inquiry form on this page or contacting our technical team with details such as shaft size, operating conditions, and the type of fluid being handled.

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