The GRACO 237503 is a manual back pressure regulator designed for use in fluid circulation systems to maintain consistent system pressure regardless of flow demand. It is constructed with 316 stainless steel, tungsten carbide (with nickel binder), acetal, and PTFE for durability and chemical resistance. This regulator is intended for use with water-based and compatible fluids in industrial finishing and coating applications.

Key Features:

• Back Pressure Regulator
• 237503 (Bare, Low Pressure, 180 Max psi, SST, Manual)
• 316 stainless steel, tungsten carbide (with nickel binder), acetal, PTFE
• Maximum flow rate: 4.3 gpm (16.3 lpm) at 100 psi (7 bar, 0.7 MPa); 4.7 gpm (17.8 lpm) at 50 psi (3.4 bar, 0.3 MPa); 3.7 gpm (12.9 lpm) at 150 psi (10.3 bar, 1.0 MPa)
• Maximum inlet pressure: 180 psi (12.4 bar, 1.24 MPa); Regulated pressure: 50–150 psi (3.4–10.3 bar, 0.3–1.0 MPa)
• Designed for water-based and compatible fluids in industrial finishing systems
• Compact and lightweight design (2.4 lb / 1.1 kg)
• Tungsten carbide materials for low wear and long life
• PTFE/elastomer hybrid diaphragm for accurate responsiveness and durability
• Maintains system pressure regardless of flow demand
• Manual operation

Applications:
Used in industrial finishing and coating systems to maintain consistent back pressure in fluid circulation loops, ensuring reliable spray gun performance and finish quality.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance in your system.
• Ensure proper thread sealant is used for all connections (e.g., Loctite 567 Low Strength Thread Sealant recommended)
• Verify inlet and outlet sizes (3/8 npt(f) inlet, 1/2 npt(f) outlet)
• Install in a location accessible for maintenance and inspection
• Check for leaks after installation and during operation
• Refer to the product manual for detailed installation and maintenance instructions