
The GAST - AA840A is a vacuum relief valve that provides vacuum relief at a preset vacuum level to limit negative pressure in connected systems. It operates by opening to allow ambient air in when internal pressure falls below a preset vacuum level, then reseals as pressure equalizes. The valve is compatible with Gast brand equipment and replaces listed Gast part numbers.
Key Features:
- - Thread size: 3/8" NPT for standard pneumatic connections.
- - Compatible with Gast brand equipment.
- - Fits and replaces multiple Gast manufacturer part numbers including 0523-101Q-G588NDX, 1423-101Q-G625, AT05-101-G215DX, among others.
- - Opens to admit air at low pressure and reseals at equalized pressure.
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