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Metal Bellow Seals
Advanced Sealing with Metal Bellows Technology for High-Temperature & Corrosive Services
At GSI – Globe Seal Industries, we design and manufacture precision metal bellow seals engineered to handle some of the most demanding industrial sealing environments. These seals are the perfect solution for high-temperature, vacuum, or corrosive services where elastomer secondary seals would fail, providing maintenance-free reliability even under extreme conditions.
Product Overview
Metal bellow seals utilize a flexible, welded or formed metallic bellows element in place of traditional spring and elastomer designs. This unique construction eliminates the need for O-rings or rubber components in the dynamic sealing area, making them highly resistant to thermal distortion, chemical attack, and solid build-up.
Whether it’s handling aggressive chemicals, superheated fluids, or vacuum processes, these seals deliver exceptional performance with virtually zero maintenance.
Key Features
✔ Eliminates Dynamic Elastomers: Flexible metal bellows replace conventional elastomers, removing a common point of failure in high-temperature and chemically aggressive services.
✔ Self-Cleaning Design: Bellows flexing action helps prevent clogging and solid deposition around the seal faces.
✔ Handles Extreme Temperatures: Performs reliably in temperatures exceeding 400°C (750°F), where standard seals cannot operate.
✔ Axial & Angular Flexibility: Compensates for shaft movements and misalignments, maintaining consistent face contact.
✔ Available in Balanced & Unbalanced Configurations: Ensures optimal sealing in various pressure ranges.
✔ Compact Construction: Designed to fit standard stuffing boxes, simplifying installation and retrofitting.
Materials of Construction
GSI metal bellow seals are constructed from premium, corrosion and temperature-resistant alloys, carefully chosen to suit your process environment, including:
Bellows Materials: Inconel 625, Hastelloy C-276, Alloy 20, SS 316L for excellent fatigue resistance and chemical compatibility
Seal Faces: Silicon Carbide, Tungsten Carbide, Carbon, Ceramic depending on your fluid characteristics
Metallic Hardware: SS 316, Duplex, or special alloys to match process demands
Optional Secondary Static Seals: PTFE, Grafoil or metal-to-metal seals for absolute chemical and thermal compatibility
Applications
Our metal bellow seals are trusted in some of the harshest process industries worldwide, including:
Chemical & Petrochemical Pumps Handling Aggressive Fluids
High-Temperature Heat Transfer Oil Pumps
Vacuum Pumps & Distillation Equipment
Power Plant Boiler Circulating Pumps
Acid & Caustic Handling in Specialty Chemical Plants
Pharmaceutical Processes Requiring Elastomer-Free Construction
Benefits of Choosing GSI Metal Bellow Seals
✅ Zero Dynamic Elastomers: Eliminates failures due to thermal hardening, swelling, or chemical degradation of O-rings.
✅ Superior Temperature & Chemical Resistance: Withstands extreme conditions that destroy conventional seals.
✅ Handles Vacuum & Reverse Pressure: Metal bellows maintain sealing integrity under vacuum or pressure fluctuations.
✅ Extended Service Life: Reduced friction and uniform face loading minimize wear, maximizing mean time between failures (MTBF).
✅ Maintenance-Free Design: No springs or elastomers to replace, reducing routine maintenance costs and downtime.