Gast DOA-P104-AA Oilless Diaphragm Vacuum Pressure Pump 115V 4.2A 60Hz

Gast DOA-P104-AA Oilless Diaphragm Vacuum Pressure Pump 115V 4.2A 60Hz

The Gast DOA-P104-AA is a compact, oilless diaphragm pump capable of both vacuum and pressure operation. Unlike rotary vane or piston pumps, diaphragm pumps use a flexible membrane to move air, eliminating the need for oil lubrication and making them well suited for applications where contamination must be avoided. The DOA-P104-AA features a built-in pressure regulator on top and two copper port fittings for vacuum and pressure connections.

Specifications & What's Included

• Manufacturer: Gast Manufacturing
• Model: DOA-P104-AA
• Pump Type: Oilless diaphragm — vacuum and pressure
• Input Voltage: 115V AC
• Current Draw: 4.2A
• Frequency: 60 Hz
• Lubrication: Oil-free
• Form Factor: Benchtop / portable with carry handle
• Ports: Two copper port fittings (vacuum and pressure)
• Controls: ON/OFF switch on rear panel; built-in pressure regulator on top head
• Feet: Rubber anti-vibration feet
• Power Cord: Attached standard AC power cord
• Included: Pump unit only — no additional accessories

Applications

Gast DOA-series oilless diaphragm pumps are standard equipment across laboratory, medical, and light industrial environments where oil-free air handling is required. They are commonly used in laboratory filtration, aspiration, and degassing setups, as well as in medical and dental offices for suction and inflation tasks, analytical instruments requiring a steady vacuum source, and small-scale industrial processes where oil contamination would compromise the product or process. The dual vacuum/pressure capability makes them versatile for tasks ranging from pulling vacuum on a flask to pressurizing a small vessel or inflating a bladder. Because they require no oil changes and produce no oil mist, they are a practical fit for clean-bench and fume-hood environments. Gast has manufactured DOA-series pumps in the United States for decades, and replacement diaphragm kits remain widely available, making these pumps easy to service.