The GRACO 17H991 iQ Valve Snuff Back Seat is a precision-engineered component designed for use in GRACO iQ Dispense Valves. It features a tungsten carbide tip and seat, providing robust sealing and wear resistance. This part is essential for controlling the flow of fluids in high-pressure dispensing systems, ensuring reliable shut-off and minimal leakage.

Key Features:

• Snuff-Back (iQ-S) reverse acting valve seat
• Tungsten carbide tip and seat
• Up to 4000 psi (28 MPa, 276 bar) for standard iQ Dispense Valves; some GRACO ball-seat valves handle up to 5000 psi (34.5 MPa, 345 bar), but this is not directly specified for the 17H991 seat.
• Designed for use with GRACO iQ Dispense Valves, specifically Snuff-Back (iQ-S) models
• Reverse acting valve for reliable shut-off
• Tungsten carbide construction for durability and wear resistance
• Designed for high-pressure applications
• Minimizes leakage and ensures precise fluid control

Applications:
Used in industrial fluid dispensing systems requiring precise control and high reliability, such as lubrication, adhesives, sealants, and coatings. Suitable for environments where abrasive or high-viscosity materials are handled.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of the dispensing system. Non-genuine parts may compromise system integrity and void warranties.
• Ensure the system is depressurized before installation
• Inspect the seat and tip for damage or wear prior to installation
• Follow GRACO’s recommended torque specifications for assembly
• Use appropriate tools and protective equipment during installation
• Regularly inspect and maintain the valve seat to prevent leaks and ensure consistent performance