GRACO 563173 - Valve Relief Indicator O-Ring 1500 PSI, 303 SST, 1/8 in NPSF w/O-Ring

Automatic Relief Indicator designed to pinpoint lube line blockage while allowing the lube system to continue supplying lubrication to points that are not blocked. Used primarily in secondary divider valves, this indicator uses excessive pressure created by line blockage to move a piston, enabling lubricant to escape through a vent. When the blockage is removed, the spring resets the piston, maintaining system operation.

Keep your machine running while lubrication gets to critical points. These performance indicators pinpoint lube line blockages but allow the lube system to continue to supply lubrication to points that are not blocked.

Additional Specifications

• Thread: 1/8 in NPSF w/O-Ring
• Max Working Pressure: 103 bar
• Material: 303 SST
• Connection Type: MHH, MSP and MXP
• Indicator Type: Automatic Relief

Specifications

Features

• Automatic relief indication
• O-Ring seal design
• 103 bar pressure rating
• Pinpoints lube line blockage while system continues operation
• Automatic pressure relief through piston-operated vent
• Spring-reset mechanism for automatic restoration

Applications

• Pressure monitoring
• Automatic relief indication
• Equipment protection
• Secondary divider valve systems
• Lubrication systems requiring blockage detection
• Systems where continued operation during partial blockage is critical

Compatible Equipment

• MJ series equipment
• MS series equipment
• MH series equipment
• MXP series equipment
• MHH divider valves
• MSP divider valves

Related Parts

• 563170 - Valve Relief Indicator O-Ring 750 PSI, 1/8" NPTF
• 563171 - Valve Relief Indicator O-Ring 1000 PSI, 1/8" Npsf w/o-Ring
• 563172 - Valve Relief Indicator O-Ring 1250 PSI
• 563174 - Valve Relief Indicator O-Ring 2000 PSI
• 563175 - Valve Relief Indicator O-Ring 2500 PSI
• 563176 - Valve Relief Indicator O-Ring 3000 PSI, 1/8" Npsf w/o-Ring
• 563163 - Valve Relief 1/8 NPT 750 PSI, 1/8 NPTF
• 563164 - Valve Relief 1/8 NPT 1000 PSI, 1/8 NPTF
• 563166 - Valve Relief 1/8 NPT 1500 PSI, 1/8 NPTF

Part of a series of automatic relief indicators with O-Ring seals available in different pressure ratings from 52 bar to 207 bar Requires separate pressure switch for audible or visual alarm. Recommended to select next higher pressure rating when replacing discontinued indicators.

Reference Manuals

• 339427 (Page 22)
• L15401EN-C (Page 2)
• 312497 (Page 39)