The Graco Husky 307 air-operated double diaphragm pumps are designed to handle various fluids, including detergents, hydraulic fluid, water, and more. They are lightweight, heavy-duty, and exceptionally reliable in handling chemicals. The Husky 307 pumps feature a stall-free low pulsation air valve, providing a smooth and rapid changeover. Built to outlast the competition, Husky 307 pumps have a durable polypropylene body, Santoprene balls and diaphragm, and polypropylene seats.