Gas pressure relief valve Si 2

for liquidsfor pipelinesEN 12516

Product overview
The Si 2 Series safety valves provide reliable overpressure protection for vapours, gases and liquids in industrial systems. Designed for set pressures up to 40 bar, these valves deliver stable and repeatable pressure relief for thermal expansion, process protection and general system safety. Available in cast iron, carbon steel and stainless steel, with inlet sizes covering DN 25 to DN 100. A cost-effective seat bushing design and optimised lift control enhance performance and maintenance economy. Certified to PED, DIN/EN and ASME standards.

Key features

• Set pressure: up to 40 bar
• Sizes: DN 25 to DN 100
• Suitable for liquids, gases and vapours
• Material options: cast iron, carbon steel, stainless steel (EN/ASME designations available)
• Optimised lift control for stable relief
• Cost-effective seat bushing design
• Certified to PED, DIN/EN and ASME

Applications
Overpressure protection for pipelines, pressure vessels and process systems subject to thermal expansion, process upsets and operational overpressure scenarios. Suitable for general industrial service where reliable relief is required.

Technical specifications

• Fluid types: Liquid; Gas; Vapour
• Material (EN): EN 1.0619; EN 1.4408
• PN rating (PN): 400
• Maximum set pressure (barg): 16 (note: product family supports set pressures up to 40 bar as stated in key features)
• Material (ASME): ASME WCB; ASME CF8M
• Inlet size (DN): DN 25 to DN 100 (examples: DN 25, DN 50)
• Design codes: EN
• Temperature limits (°C): -200 to 450
• Max. ASME rating: 2500
• Certification: PED (additional regional ASME/ISCIR/TSSA/AD2000/KTA documents available)
• Service category: General