The Graco D31331 Husky 307 Air-Operated Diaphragm Pump is a compact, high-performance solution engineered for industrial fluid handling applications. Featuring a stall-free, low-pulsation air valve for smooth and rapid changeover, this 3/8-inch NPT pump delivers up to 6.5 GPM and operates efficiently on as little as 20 psi. Built with a durable polypropylene center section, stainless steel seats and balls, and a PTFE/EPDM diaphragm, it is ideal for transferring oil, fuel, antifreeze, and other compatible fluids. With easy assembly, serviceable components, and ATEX and CE certifications, the D31331 is a reliable, versatile choice for demanding environments

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