The GRACO 189378 is a fluid cover made from Kynar material, designed for use in the fluid section of GRACO Husky 1040 air-operated diaphragm pumps. Its primary function is to protect and seal the fluid chamber, ensuring safe and efficient operation of the pump.

Key Features:

• Fluid Cover
• 1040
• Kynar (PVDF)
• GRACO Husky 1040 air-operated diaphragm pumps (Kynar models)
• Durable Kynar construction for chemical resistance
• Designed for reliable sealing and protection of the fluid chamber
• Engineered for ease of maintenance and replacement

Applications:
Used in industrial fluid transfer applications where chemical resistance and reliability are required, such as in chemical processing, mining, and agriculture.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, performance, and safety of the pump system.
• Ensure pump is depressurized and isolated before installation
• Follow torque specifications for cover screws (longer screws: 100–150 in-lb / 11–17 N-m using a 10 mm socket wrench)
• Reassemble ball check valves and manifolds as per manual instructions
• Regularly inspect cover for wear or damage
• Replace cover if signs of degradation or leaks are present
• Use only compatible replacement parts