The Bühler Technologies P4.3 Sample Gas Pump is a heavy-duty, high-capacity diaphragm extraction pump manufactured by Bühler Technologies GmbH (Germany)—a worldwide leader in sample gas conditioning and analysis solutions. The P4.3 series is engineered specifically for CEMS applications demanding high flow rates, long sampling line distances, or feeding multiple gas analyzers simultaneously.

The primary technical strength of the P4.3 model lies in its robust motor drive and diaphragm assembly, delivering a free flow rate of up to approx. 800 Nl/h (approx. 13.3 L/min). Its chemically inert pump head is constructed from premium corrosion-resistant materials including PTFE, PVDF, or 1.4571 (316Ti) Stainless Steel combined with a reinforced PTFE-coated diaphragm, handling aggressive sample gas constituents such as SO2, SO3, NOx, HCl, HF, H2S, CO, CO2, and solvent vapors without degradation.

Designed for low vibration and minimal noise emission, the Bühler P4.3 provides outstanding durability for continuous 24/7 duty in demanding industrial plant environments. The user-friendly modular pump head allows straightforward inspection, diaphragm, and valve replacements, reducing maintenance time and ensuring uninterrupted system operation.

• Manufacturer: Bühler Technologies GmbH
• Product Series / Model: P4.3 (Heavy Duty High-Flow Sample Gas Diaphragm Pump)
• Country of Origin: Germany
• Operating Principle: Heavy Duty Electromechanical Diaphragm Pump
• Free Flow Rate: Max approx. 800 Nl/h (approx. 13.3 L/min)
• Max Operating Pressure: Max 2.0 bar - 2.5 bar relative
• Max Vacuum Capacity: Down to 0.2 bar - 0.3 bar absolute
• Wetted Materials: PTFE, PVDF, Viton (FKM), Stainless Steel 1.4571 (316Ti)
• Diaphragm Material: Reinforced PTFE-coated EPDM
• Max Inlet Gas Temperature: Up to +70°C / +100°C (depending on head material)
• Ambient Operating Temperature: -20°C to +60°C
• Power Supply Options: 230V AC (50/60 Hz), 115V AC (50/60 Hz), or 400V 3-phase AC
• Power Consumption: Approx. 90W to 130W
• Inlet / Outlet Port Connections: G 1/4" or G 3/8" female / NPT threads
• Protection Class: IP 54 / IP 55
• Net Weight: Approx. 4.5 kg - 6.0 kg
• System Compatibility: High flow capacity, excellent chemical resistance, fully integrable into large CEMS shelters, long sample lines, and multi-analyzer conditioning systems.