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IMI Bopp & Reuther
Si 4 - High Flow Safety Valve
High-flow safety valve with modular design for reliable overpressure protection.
High-flow capacity for efficient pressure relief.
Modular design for streamlined maintenance.
Safe disassembly with an unloaded spring system.
Features
The Si 4 Series high-flow safety valves provide efficient overpressure protection for pressure vessels, heat exchangers, and piping systems. Designed for vapours, gases, and liquids, these state-of-the-art valves feature a cost-effective semi-nozzle body and press-fitted seat bushing for long-term reliability. The modular design ensures easy maintenance with standardised spare parts, while a safe spring unloading system allows disassembly without affecting set pressure. Built from carbon steel (1.0619) and stainless steel (1.4408), the Si 4 Series is available in DN 20 to DN 200 sizes with set pressures from 0.1 to 40 bar g, ensuring optimal safety performance.
Key features
Set pressures: 0.1 to 40 bar g
Sizes: DN 20 to DN 200
Carbon & stainless steel
Semi-nozzle body design
Unloaded spring for safe disassembly
Modular design
Specifications
Fluid Types
Liquid
Gas
Vapour
Material (EN)
EN 1.0619
EN 1.4408
PN Rating (PN)
40
Maximum Set Pressure (barg)
40
Material (ASME)
ASME WCB
ASME CF8M
Inlet Size (DN)
20
200
Design Codes
EN
ASME UV
Service Category
General
Max. ASME Rating
300
Certification
PED
ASME UV
Temperature Limits (°C)
-200 to 450
Resources
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