US-TB/TBR
US-TB/TBR
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The US-TB and US-TBR mechanical seals are designed for applications involving corrosive chemicals, acids, and reactive process fluids. The seals utilize PTFE and GFT composite bellows that provide excellent chemical resistance and eliminate the need for dynamic elastomers. The US-TB version features a replaceable rotary seal face, while the US-TBR design incorporates an integral seal face construction. These seals are widely used in pumps and rotating equipment operating in chemical processing plants, fertilizer units, and other industries handling aggressive media. |
Key Design Features
- Outside mounted design
- No dynamic elastomers
- Hydraulically balanced construction
- Replaceable rotary face in TB design
- Integral seal face in TBR design
Operating Range & Limits
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Pressure
TB up to 6 kg/cm²
TBR up to 8 kg/cm²
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Temperature
-45°C to 120°C
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Speed
Up to 2900 rpm
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Shaft Size
19 mm to 100 mm
Materials of Construction
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Bellows
PTFE + GFT Composite
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Metal Parts
SS316, Hastelloy C, Alloy-20
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Elastomers
PTFE, GFT
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Rotary Face (TB)
Carbon, Silicon Carbide, GFT
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Rotary Face (TBR)
GFT
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Stationary Face
Silicon Carbide, Ceramic
Recommended Applications
Chemical processing plants
Fertilizer manufacturing units
Petrochemical processing systems
Acid and corrosive fluid pumps
Chemical transfer pumps
Industrial mixing and agitation systems
Manufacturing Standards & Quality Inspection
Every mechanical seal is manufactured with optical-grade precision at our Mohan Nagar, Ghaziabad facility.
ISO 9001:2015 Certified
Manufactured in strict adherence to international quality management and material traceability.
Monochromatic Light Inspection
100% seal faces verified with optical flats under helium light (< 2 light bands flatness).
Hydrostatic Testing
Hydrostatically pressure-tested to 1.5x working pressure for zero operational leakage.
24-48 Hr Fast Dispatch
Emergency breakdown dispatch across Delhi NCR, Gujarat, Maharashtra, and worldwide.
US-TB/TBR - Frequently Asked Questions
US-TB and US-TBR series seals use chemically inert PTFE and glass-filled PTFE composite bellows. This construction completely eliminates metallic contact with corrosive acids (such as sulfuric, nitric, and hydrochloric acids) and hostile solvents, preventing chemical attack and pitting.
The US-TB handles pressures up to 6 kg/cm² (bar), while the US-TBR handles up to 8 kg/cm². Both models operate within a temperature envelope of -45°C to +120°C with shaft speeds up to 2900 RPM across shaft diameters from 19 mm to 100 mm.
The US-TB features an easily replaceable rotary seal face for cost-effective field maintenance. In contrast, the US-TBR features an integral composite face design offering heightened structural rigidity under higher hydraulic pressures.
Yes. Unique Seal Engineering Co. customizes the mounting gland, clamping collar, and shaft sleeve dimensions to directly fit standard ISO, DIN, and non-standard glass-lined and chemical process pumps.
Click "Get Quote for this Product" on this page, specify your shaft diameter, pumped chemical, temperature, and operating pressure. Our engineering team responds within 2 business hours.
Request Quotation & Technical Fitment
Share your equipment specifications. Our engineering team will recommend the optimal seal metallurgy, face pairings, and provide a formal price quote within 2 business hours.
Sealing Solutions Across Key Industries
Automotive Components
Textiles
Pharmaceuticals
Chemical Processing
Sugar
Distillation
Food & Beverage
Steel
Power & Energy
Paper
Oil & Gas
Petrochemical Plants
Paint
Pumps & Compressors
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