GRACO 25R647 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 25 gpm Max flow rate, SST,

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

Low shear back pressure regulator designed to minimize material waste caused by paint shear and maximize service life with Ultralife ceramic coated parts that withstand high wear. Features best-in-class performance in maintaining pressure constant with a broad range of flow rates, resulting in the lowest amount of cumulated paint shear. Low profile, compact design with backwards compatibility ensures easy installation and replacement.

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

Additional Specifications

Flow Rate: 25 gpm (95 lpm) max

Max Working Pressure: 300 PSI (20.7 bar) max

Material: SST, Acetal and PTFE

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

Type: Spring operated

Gauge Included: Yes

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

Regulated Fluid Pressure: 25-250 PSI (.17-1.72 MPa, 1.7-17.2 bar)

Max Fluid Working Pressure: 300 PSI (2.1 MPa, 21 bar)

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

Temperature Range: 0°C to 50°C

Approvals: CE, Ex h IIB T6 Gb

Protection Type: constructional safety ‘c’

Torque Requirement: 35-45 ft-lbs (47.5-61 Nm)

Component Type: Higher Flow Mechanical Spring

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 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

Best-in-class performance maintaining pressure constant

Broad range of flow rates with lowest cumulated paint shear

Low profile, compact design

Backwards compatibility for easy installation and replacement

Applications

Shear sensitive, high solid materials

Paint finishing applications

Coating systems requiring consistent finish quality

Applications requiring sanitary connections

Compatible Equipment

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

Mechanical (Spring) Operated BPR

Related Parts

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

25R487 – Low Shear Fluid Back Pressure Regulator, 300 Max psi, 10 gpm Max flow rate, SST, Pneumatic, high wear, sanitary Inlet/Outlet, 100 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 to pneumatic-operated regulator

25T508 – Conversion kit for 25R488 to pneumatic-operated

25R842 – High-Flo diaphragm repair kit

25T507 – Low-Flo diaphragm repair kit

Part of GRACO’s Low Shear BPR product family. Works with IPK control systems. Manual 3A7527 contains installation and operation instructions. Air operated and mechanical (spring) type available. Part of back pressure regulator product family with different flow ranges and operating mechanisms. 25R647 is the Higher Flow Mechanical (Spring) component, while 25R488 is the Lower Flow Mechanical (Spring) component. Both are parts of a Mechanical (Spring) Operated BPR assembly. The part has a torque specification of 35-45 ft-lbs and is referenced as item 7 in the assembly diagram.

Reference Manuals

345172 (Page 1) 345172 Low Shear BPR

3A7527 (Page 2) Low Shear Back Pressure Regulator