Graco 15B266 Buna-N Ball Seat for Husky 1590

Graco 15B266 Buna‑N Ball Seat for Husky 1590 – Product Details & Compatibility

Compatible Machines

The Graco 15B266 Buna‑N Ball Seat is specifically used in Graco Husky 1590 air‑operated diaphragm pumps and assemblies that require a Buna‑N (nitrile) check‑valve seat.

• Graco Husky 1590 series AODD pumps with Buna‑N check‑valve configurations 
• Fluid‑handling systems where Buna-N material is preferred for sealing against oils, solvents, or general fluids 
• Service and repair kits where OEM‑specified seats are required for correct pump performance 

Product Overview

The Graco 15B266 Buna‑N Ball Seat is a precision-engineered check‑valve seat made from nitrile rubber (Buna‑N) for the Husky 1590 series. It offers reliable sealing, durability under cyclic pump operation, and compatibility with the corresponding ball assembly.

Key Features

• OEM‑specified Buna‑N (nitrile) seat for reliable sealing in Husky 1590 check valves
• Designed for repeated cycling and fluid pressure pulses in diaphragm pumps
• Excellent chemical compatibility with oils, water‑based fluids, and general industrial liquids 
• Supports maintenance and repair without needing to replace the entire check‑valve housing

Technical Specifications

Usage Notes

• Always depressurize and isolate fluid lines before disassembling the check‑valve section.
• Install the OEM 15B266 seat to ensure correct sealing geometry and material performance; using incorrect materials can lead to leakage or premature failure.
• Inspect the mating ball and the seat bore for wear, nicks or debris before installation.
• After installation, test the pump under normal operating conditions and monitor for back‑flow, leakage or abnormal pressure behavior.

Frequently Asked Questions