Check Valves
  SPC SERIES:
• 1/8" to 1/2" ports
• Max. operating pressure: 2000 PSI Non-shock
• Operating temperature: 0° to 140°F
• Provides free flow of air or oil in one direction and dependable shutoff in the opposite direction

339 SERIES, 3047 SERIES:
• 1/8" to 3/4" ports; 1/4" male pipe (3047 Series)
• Max. operating pressure: 250 PSIG
• Operating temperature: 0° to 180°F
• Allows free flow in one direction and provide positive checked (zero flow) in the reverse direction