GRACO 563170 - Valve Relief Indicator O-Ring 750 PSI, 1/8" NPTF

Automatic Relief Indicator that pinpoints lube line blockage while allowing the lube system to continue supplying lubrication to points that are not blocked. Used primarily in secondary divider valves, the excessive pressure created by line blockage moves a piston, enabling lubricant to escape through a vent. Features a spring reset mechanism and operates at 750 PSI with ±20% tolerance.

Specifications

• Thread: 1/8 in NPTF
• Max Working Pressure: 52 bar
• Material: Carbon Steel
• Spring Retainer Color: Blue (750 PSI rating)
• Tolerance: ±20%
• Color: Blue
• Indicator Type: Automatic Relief Indicator
• Includes O Ring: Yes

Features

• O-ring seal design
• Automatic relief indication
• 52 bar pressure rating
• Pinpoints lube line blockage while system continues operating
• Spring reset mechanism automatically resets piston when blockage is cleared
• Visual indication through vent operation

Applications

• Pressure monitoring
• Automatic relief indication
• Industrial fluid handling systems
• Secondary divider valves in lubrication systems
• Lube line blockage detection
• Continuous lubrication system monitoring

Compatible Equipment

• MJ series equipment
• MS series equipment
• MH series equipment
• MXP series equipment
• Secondary divider valve systems
• 1/8 in NPTF threaded connections

Related Parts

• 563171 - Valve Relief Indicator O-Ring 1000 PSI, 1/8" Npsf w/o-Ring
• 563172 - Valve Relief Indicator O-ring 1250 psi
• 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
• 563164 - 1,000 PSI version
• 563165 - 1, 250 PSI version
• 563166 - 1,500 PSI version
• 563167 - 2,000 PSI version

Part of a family of automatic relief indicators with O-ring seals available in different pressure ratings from 52 bar to 207 bar Formerly identified by spring retainer color (Blue = 750 PSI). Requires separate pressure switch connected to audible or visual alarm for high pressure warning. Recommended to select next higher pressure rating when replacing discontinued ratings. Used primarily in secondary divider valves. Allows lube system to continue operating when a lube point is blocked. Color coded for service and replacement identification by the color of the spring retainer.

Reference Manuals

• 339427 (Page 22) Automatic Lubrication Systems
• L15401EN - C (Page 2)
• 312497 (Page 39) Trabon Divider Valves .