GRACO Husky 1590 Aluminum (1-1/2" NPT) Standard Pump, Aluminum Center Section, Polypropylene Seats, Buna-N Balls & Buna-N Diaphragm - (SKU: DB3977) but set screws are generally

but set screws are generally made from hardened steel or alloy for durability

and automatic lubrication systems

Ensure the retaining ring is properly seated to prevent component movement or failure

Effective for removing contaminants from liquids

Handle with care to avoid damaging the spring or retainer

GRACO Husky 1590 Aluminum (1-1/2" NPT) Standard Pump, Aluminum Center Section, Polypropylene Seats, Buna-N Balls & Buna-N Diaphragm - (SKU: DB3977) but set screws are generallyThe GRACO DB3977 is an air operated double diaphragm pump designed for industrial fluid transfer. It features an aluminum center section, polypropylene seats, Buna N balls, and a Buna N diaphragm, making it suitable for handling a wide range of chemicals and fluids in demanding environments. Key Features: Air Operated Double Diaphragm Pump Husky 1590, 1 1 2" NPT Aluminum center section, polypropylene seats, Buna N balls, Buna N diaphragm Maximum free