The GRACO 246643 is a heated, air-operated fluid pressure regulator designed for use with low to high viscosity warm-melt and hot-melt sealants or adhesives. It is constructed with materials compatible with mastic fluids and is intended to provide precise pressure control for spray or extruder guns in GRACO equipment.

Key Features:

• Air Operated Heated Mastic Fluid Pressure Regulator
• 246643
• Metal housing with Viton seals and O-rings for compatibility with mastic fluids
• Maximum inbound fluid pressure: 5000 psi (34.4 MPa, 344 bar); Minimum regulated pressure: 100 psi (0.7 MPa)
• For use with GRACO systems only; compatible with low to high viscosity warm-melt and hot-melt sealants or adhesives
• Heated design for temperature-sensitive materials
• Precise pressure control for each spray or extruder gun
• Dampens flow surges during valve operation and pump stroke changeover
• Reliable performance with robust construction
• Ease of maintenance with accessible parts

Applications:
Used in industrial and commercial settings for applying mastic, sealants, or adhesives, particularly where temperature control and precise pressure regulation are required. Ideal for multiple outlet systems with a common header.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance of the regulator and the overall system.
• Install the regulator ahead of each spray gun or extruder gun in a multiple outlet system
• Ensure inbound fluid pressure is at least 600 psi (4.1 MPa, 41 bar) above the regulated fluid pressure for optimum performance
• Use fluids compatible with the equipment wetted parts
• Follow torque specifications for assembly (e.g., 35–40 ft-lb for certain components, 15–25 ft-lb for others)
• Apply appropriate thread sealants (e.g., Loctite TL-242, Loctite 601) as specified