Gast AA640 Vacuum Gauge 2 Inch 1/4 Npt Rotary Vane

Product Description

The GAST AA640 is a vacuum gauge designed for use with rotary vane air compressor and vacuum pump units. With a 2-inch diameter dial face and a 1/4 NPT threaded connection, this gauge mounts directly to compatible GAST rotary vane units to provide accurate vacuum pressure readings during operation. The compact dial size makes it easy to read in tight service environments. HVAC technicians and equipment service professionals install this gauge as a direct OEM-style replacement when the original gauge becomes damaged, inaccurate, or unreadable. No special tools are required beyond basic wrenching capability for the 1/4 NPT fitting.

The AA640 is a direct-fit replacement gauge for GAST 0211 and 0523 series rotary vane units. These compact rotary vane machines are used in a range of light industrial, medical, laboratory, and HVAC service applications where a reliable vacuum pressure indication is needed at the pump. The 1/4 NPT thread is a standard connection size, making installation straightforward on original equipment port locations.

Key Features

• 2-inch diameter dial face for clear pressure reading in compact installations
• 1/4 NPT threaded connection for direct mounting to GAST rotary vane units
• OEM-style replacement gauge for GAST 0211 and 0523 series units
• Compact form factor suited to tight equipment bays and service panels
• Standard NPT thread eliminates the need for adapter fittings on compatible units

Compatibility

Designed for use with GAST 0211 and 0523 series rotary vane units as stated by the manufacturer.

Installation Notes

Installation should be performed by a qualified technician familiar with compressed air and vacuum equipment. Before removing the existing gauge, power down the unit completely and allow system pressure or vacuum to fully equalize to atmospheric pressure. Apply thread sealant appropriate for pneumatic connections to the 1/4 NPT threads before installation. Do not overtighten the gauge fitting, as excessive torque can damage the gauge port or body.