Cole-Parmer Masterflex Solenoid Diaphragm Chemical Feed Pump, 92 mL/min, 115V, Model 76302-20

The Cole-Parmer Masterflex Solenoid Diaphragm Chemical Feed Pump (Model 76302-20) is a compact, adjustable-speed pump designed for precise chemical dosing in laboratory, industrial, and water treatment applications. It features a solenoid-driven diaphragm mechanism that ensures reliable, pulse-free flow for metering chemicals such as acids, bases, and disinfectants. Key benefits include easy adjustability via a front dial for flow rates from minimum to maximum, high chemical resistance with materials like PVDF and PTFE, and a self-priming design that handles viscous fluids up to 500 cP. Compared to peristaltic pumps, it offers higher pressure capabilities (up to 125 psi) but may require more maintenance due to diaphragm wear. Drawbacks include potential noise from solenoid operation and limited suitability for abrasive slurries. This model operates on 115V AC, delivering up to 92 mL/min (equivalent to approximately 1.46 GPH), making it ideal for small-scale processes like pH control or additive injection. Accessories often include tubing, filters, and injection valves for quick setup. Its robust construction ensures durability in harsh environments, with IP-rated enclosure for splash resistance. Overall, it provides cost-effective precision over manual dosing methods, with advantages in automation and repeatability for consistent results.