GRACO 563172 - Valve Relief Indicator O-Ring 1250 PSI, MHH, 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. Features excessive pressure detection that moves a piston to enable lubricant escape through a vent, with automatic spring reset when blockage is removed. Primarily used in secondary divider valves for continuous lubrication 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: 86 bar
• Material: MHH, MSP and MXP
• Connection Type: NPSF without O-Ring
• Tolerance: ± 20%
• Color: Yellow

Specifications

Features

• O-Ring seal design
• Visual relief indication
• 86 bar pressure rating
• Automatic operation
• Pinpoints lube line blockage while maintaining system operation
• Automatic pressure relief through piston-operated vent system

Applications

• Pump relief monitoring
• System pressure protection
• Visual safety indication
• Secondary divider valve lubrication systems
• Automatic lubrication systems requiring blockage detection
• Industrial lubrication monitoring applications

Compatible Equipment

• MJ series pumps
• MS series pumps
• MH series pumps
• MXP series pumps
• 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
• 563173 - Valve Relief Indicator O-Ring 1500 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 complete family of automatic relief indicators with O-Ring seals available in pressure ratings from 52 bar to 207 bar Should be used with separate pressure switch connected to audible or visual alarm for high pressure warning. Formerly identified by spring retainer color coding system. This is an automatic relief indicator that pinpoints lube line blockage but allows the lube system to continue supplying lubricant to points that are not blocked. Used primarily in secondary divider valves. The excessive pressure created by line blockage moves a piston, enabling the lubricant to escape through a vent. When pressure is relieved the spring resets the piston. Color coded to be identified by the color of the spring retainer located in the end of the indicator.

Reference Manuals

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