The GRACO 189318 is a stainless steel ball seat designed for use in the 1590 series air-operated diaphragm pumps. It functions as a critical sealing and check valve component within the pump’s fluid section, ensuring reliable flow control and preventing backflow.

Key Features:

• Ball Seat
• 1590 Series
• Stainless Steel (SST)
• GRACO Husky™ 1590 Air-Operated Diaphragm Pumps
• Precision-engineered for reliable sealing
• Durable stainless steel construction for corrosion resistance
• Designed for easy maintenance and replacement
• Ensures consistent pump performance and longevity

Applications:
Used in fluid transfer applications where reliable check valve operation is required, such as in industrial, chemical, and process environments. Suitable for use with a variety of fluids compatible with stainless steel.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and compatibility with your equipment.
• Clean all parts and inspect for wear or damage before installation.
• Reassemble in the reverse order of disassembly, following all notes in the manual.
• Ensure ball checks are assembled exactly as shown in the manual.
• Torque fluid covers to 80–90 in-lb (9–10 N•m) as specified.
• Arrow on the fluid cover must point toward the outlet manifold.
• Regularly inspect the ball seat and ball for wear or damage.
• Replace worn or damaged parts promptly to maintain pump efficiency.
• Follow all safety and pressure relief procedures during maintenance.