Gast AF818A Diaphragm Doa Daa Pressure Models

Product Description

The GAST AF818A is a replacement diaphragm designed for use with GAST DOA and DAA series pressure model air compressors. The diaphragm is a critical wear component that separates the compression chamber from the drive mechanism, maintaining efficient airflow and preventing contamination between sections. When the original diaphragm cracks, stiffens, or loses flexibility, output pressure drops and the compressor becomes unreliable. Replacing it with a correct-fit part like the AF818A restores rated performance. This part is installed by HVAC technicians, equipment service technicians, and facilities maintenance professionals working on compressor-driven systems.

The AF818A is intended for service and repair applications involving GAST DOA and DAA pressure model diaphragm compressors. These compressors are commonly found in laboratory equipment, dental systems, environmental monitoring instruments, industrial automation, and light-duty pneumatic applications. The diaphragm replacement is a standard scheduled-maintenance task performed when output pressure falls below specification or when inspection reveals visible wear or damage to the existing diaphragm.

Key Features

• Direct replacement diaphragm for GAST DOA and DAA pressure model compressors
• Restores proper compression chamber seal and rated output pressure
• Designed to OEM fit specifications for straightforward drop-in service
• Sold as a single unit, suitable for single-head compressor service

Compatibility

Designed for use with GAST DOA and DAA pressure model diaphragm compressors.

Installation Notes

Diaphragm replacement should be performed by a qualified technician familiar with diaphragm compressor service procedures. Disconnect and lock out power to the compressor before disassembly. Remove the compressor head carefully to avoid damaging mating surfaces, and inspect the head gasket and valve plates for wear while the unit is open. Reassemble to manufacturer torque specifications using appropriate hand tools.