Guardian II Metal Bellows Seal
The Flowserve Guardian II Metal Bellows Seal control valve eliminates valve leakage using a formed metal bellows design with minimal welded joints.
The Guardian II provides a full-cycle life of up to 5 million cycles, ensuring years of safe and reliable operation in hazardous processes, withstanding temperatures ranging from -320°C to 538°C.
The valve features a metal shroud that acts as a pressure boundary, allowing the use of a single, pressurized gasket seal and preventing fluid contact with the bellows housing during normal operation.
It can be retrofitted to a standard Mark One valve by changing the plug and bolting, adding a bellows assembly, bellows housing, and lower guide assembly.
- Specifications
- Advantages
- Industries
- Applications
- Documents
- Contact
Specifications
- Temperature range: -320° to 1000° F (-196° to 538° C)
- Pressure range: Up to 1100 psi (75.8 Bar)
- Full-cycle life: Up to 5 million cycles
- Design: Formed metal bellows with minimal welded joints
- Compatibility: Retrofit to standard Mark One valve
Advantages
- Full-cycle life of up to 5 million cycles
- Wide selection of materials available
- External pressurization increases cycle life and maximum allowable pressure
- Prevents “bellows squirm”
- Replaceable plug head allows trim changes without changing the bellows assembly
Industries
- Volatile Organic Compounds
- Leaching Acid
- Bleach Chemicals
- Acid Transfer
Applications
- Acid Transfer
- Chemical Processing
- Chlor-alkali
- Difficult-to-Seal Liquids
- Inorganic Chemicals
- Safety Systems
- Toxic Services
Documents
Contact our Valve Specialist Team
- Brendan Merrigan (External) – mob: 087 2598124
- Vicki McGrath – tel: 021 461 7207
- Brian Barry – tel: 021 461 7211
- Tim Quigley – tel: 021 461 7209
- Ross O’Donovan – tel: 021 461 7230
- Shauna O’Connor – tel: 021 461 7237
- Tel: 021 461 7200
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