The Bühler Technologies RAF-PV-30 Sample Gas Filter is an advanced particulate filtration instrument featuring integrated safety engineering, developed by Bühler Technologies GmbH (Germany)—a global authority in industrial gas analysis components. This filter is specifically designed to eliminate fine dust particles while providing absolute backflow prevention for gas and liquid condensate in CEMS gas conditioning lines.

The key feature of the RAF-PV-30 model compared to standard filters is its built-in non-return valve (check valve). This integrated valve protects upstream components and sensitive gas analyzers against pressure surges, condensate backflow, or dangerous gas reversal during unexpected system shutdowns or pressure drops.

The filter head of the RAF-PV-30 is precision-molded from high-grade PVDF (Polyvinylidene Fluoride), offering superior chemical resistance against harsh corrosive gases including SO2, SO3, NOx, HCl, HF, and CO2. The transparent borosilicate glass bowl allows effortless visual monitoring of 30 mm filter element contamination. Engineered with an optimized internal flow path and minimal dead volume, the RAF-PV-30 ensures rapid real-time analyzer response times.

• Manufacturer: Bühler Technologies GmbH
• Product Series / Model: RAF-PV-30 (Sample Gas Filter with Integrated Non-Return Valve)
• Country of Origin: Germany
• Function: Particulate filtration with integrated backflow prevention (Non-Return / Check Valve)
• Filter Head Material: PVDF (Polyvinylidene Fluoride)
• Filter Bowl Material: Heat & chemical resistant Borosilicate Glass / PVDF
• Gaskets & Check Valve Material: Viton (FKM) / FFKM / PTFE / Hastelloy spring
• Filter Element Size: Standard 30 mm length elements (e.g., F-2, F-25, S-2)
• Filter Retention / Fineness: 2 µm to 25 µm (depending on selected filter element)
• Cracking Pressure (Check Valve): ~ 0.1 bar to 0.2 bar
• Max Operating Pressure: 2 bar to 4 bar
• Max Operating Temperature: Up to +100°C (Glass bowl) / +80°C (PVDF bowl)
• Inlet / Outlet Port Connections: G 1/4" or NPT 1/4" female threads
• Condensate / Drain Connection: G 1/4" or NPT 1/4" female thread (bottom drain connection)
• Dead Volume: Approx. 45 ml to 50 ml (optimized for rapid sample response time)
• Net Weight: Approx. 0.5 kg - 0.7 kg
• System Compatibility: High chemical resistance, fully integrable into CEMS gas conditioning lines, sample gas coolers, and analyzer protection circuits.