Specialty Valves - 1/8,1/4 & 3/8 NPTF Pilot Operated Check Valves with Auto Exhaust for Releasing Trapped Air Automatically.
		• Automatic Release of Trapped Air • Bubble Tight Operation • Manual Release (Optional) • Slow Release to Lower Load Gently Basic Operation: Lock your pneumatic device in position when a pressure drop or total loss of pressure occurs.Automatically release trapped air in valves that are not accessible for manual release (OSHA).