GRACO 25R457 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 25 gpm Max flow rate, SST,

GRACO 25R457 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 25 gpm Max flow rate, SST, Pneumatic, high wear, sanitary Inlet/Outlet, 100 PSI

Low shear back pressure regulator designed to minimize material waste and maximize service life with shear-sensitive, high solid materials. Features Ultralife ceramic coated parts for high wear resistance and innovative flow path geometry for industry-leading low shear capability that minimizes paint shear and produces consistent finish quality.

Gracos low shear back pressure regulator (BPR) minimizes shear and prevents paint degradation so that manufacturers produce consistent finish quality.

Additional Specifications

Material: SST, Acetal and PTFE

Regulated Pressure: 25-250 PSI (1.7-17)

Type: Air Operated

Wetted Parts: SST, Acetal and PTFE

Flow Range: 5-25 gpm, 19-95 lpm

Regulated Fluid Pressure: 25-250 PSI (1.7-1.72 MPa, 1.7-17.2 bar)

Temperature Range: 0°C to 50°C

Approvals: CE, Ex h IIB T6 Gb

Protection Type: constructional safety ‘c’

Fluid Air Ratio: approximately 2.5:1

Inlet Air Pressure: 100 PSI (0.7 MPa, 7.0 bar)

Max Air Pressure: 100 PSI (0.7 MPa, 7.0 bar)

Specifications

Compatible Material	Waterborne, Solventborne
Gauge Port Size (in)	1/4
Gauge Port Type	NPT
Inlet Size (in)	1.5
Inlet Thread Type	Sanitary Flange
Maximum Air Inlet Pressure (psi)	100
Maximum Flow Rate (GPM)	25
Maximum Operating Temperature (°F)	122
Maximum Regulated Pressure (psi)	250
Maximum Viscosity (cP)	1000
Maximum Working Pressure (psi)	300
Minimum Operating Temperature (°F)	32
Minimum Regulated Pressure (MPa)	0.17
Minimum Regulated Pressure (psi)	25
Outlet Size (in)	1.5
Outlet Thread Type	Sanitary Flange
Type	Back Pressure Regulator
Wetted Material	Stainless Steel, Tungsten Carbide

Features

Minimizes material waste caused by paint shear

Maximizes service life with Ultralife ceramic coated parts that withstand high wear

Best-in-class performance maintaining pressure constant with broad range of flow rates

Low profile, compact design for easy installation

Backwards compatibility for easy replacement

Innovative flow path geometry for industry-leading low shear capability

Applications

Shear sensitive, high solid materials

Paint finishing applications

Industrial coating applications

Compatible Equipment

Intelligent Paint Kitchen (IPK) systems for energy consumption and paint shear control

Related Parts

25R488 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 10 gpm Max flow rate, SST, Mechanical, high wear, sanitary Inlet/Outlet

25R647 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 25 gpm Max flow rate, SST, Mechanical, high wear, sanitary Inlet/Outlet, 300 PSI

25R457 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 25 gpm Max flow rate, SST, Pneumatic, high wear, sanitary Inlet/Outlet, 100 PSI

25T509 – Conversion kit for 25R647 to pneumatic operation

25T508 – Conversion kit for 25R488 to pneumatic operation

25R842 – High-Flo diaphragm repair kit

25T507 – Low-Flo diaphragm repair kit

25R487, 25R4B7

Air operated model that works with Intelligent Paint Kitchen (IPK) control to reduce energy consumption and paint shear. Gauge included. For installation and operation instructions, use manual 3A7527. Air operated type with higher flow capacity. Has explosion protection rating Ex h IIB T6 Gb with constructional safety ‘c’ protection type. This is identified as a higher flow unit compared to the 25R4B7 lower flow units. Maximum air pressure should not exceed 100 PSI (0.7 MPa, 7.0 bar).

Reference Manuals

345172 (Page 1) 345172 Low Shear BPR

3A7527 (Page 2) Low Shear Back Pressure Regulator