The GAST MAA-V103-HB at Kinequip is a compact, oil-less diaphragm compressor and vacuum pump engineered for clean, quiet, and efficient operation. Its rugged construction and corrosion-resistant materials make it ideal for demanding environments such as medical labs and analytical equipment. Designed for low noise and vibration, the MAA-V103-HB is well-suited for noise-sensitive applications. It features oversized, maintenance-free bearings, a bonded connecting rod for durability, and easily replaceable components like the diaphragm and valves—ensuring long service life and minimal downtime. With a 100% duty cycle and thermal protection, it delivers reliable performance in continuous-use scenarios.
Key Features:
- Compact and efficient: Lightweight and space-saving at only 8 lbs.
- Dual function: Operates as both a compressor and vacuum pump.
- Thermal protection: Prevents overheating during extended use.
- Easy maintenance: Replaceable air filter, diaphragm, and valves.
- Quiet and low-vibration: Ideal for medical and laboratory environments.
Can water be pumped through my unit?
No, clean dry air only.
What are the small washers between the valve plate and the body for?
They serve as spacing between the retainer plate and the valve plate. They must be kept in the same location to ensure proper alignment.
What kind of oil do I need for my diaphragm unit?
None, Gast diaphragm units are oilless, and do not require oil.
Can I pump combustible gas through my MOA?
No, none of Gast models are designed to pump combustible gases.
My DOA model was sitting on my shelf for a long time, now it will not start.
With the power disconnected from unit, insert a rigid instrument through the grill and rotate the cooling fan a few times. This should loosen the diaphragm and allow the unit to start.
What can I use to flush my diaphragm unit with?
Gast flushing solvent, AH255D. If this is not available you can use electrical contact cleaner.
Can I use the same kit for new style DOA (dome shaped head) as for the old flat head style?
Yes the kit will contain parts for new and old style units.
Can I get new motor brushes for my DC voltage unit?
Can I replace the motor on my diaphragm unit?
The motor can not be replaced in the field, the unit should be sent to an authorized service center.
How can I replace the rod assembly in my diaphragm unit?
The rod assembly is not field replaceable, the unit should be sent to an authorized service center.
What does the model number mean?
For an explanation of the Diaphragm model numbers please click here.
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Shipping
We are committed to delivering your machine parts quickly and securely. Orders are processed within 1-2 business days, and shipping times vary based on your location and selected shipping method. Standard shipping typically takes 3-7 business days, while expedited options are available for faster delivery. We ship domestically and internationally, with tracking information provided for all orders. Shipping rates are calculated at checkout. Please ensure your shipping address is accurate to avoid delays.
Returns
We want you to be fully satisfied with your purchase. If you need to return a product, we accept returns within 30 days of delivery for a full refund or exchange, provided the item is unused, in its original condition, and includes all packaging. Customers are responsible for return shipping costs unless the return is due to a defect or error on our part. To initiate a return, please contact our support team with your order details. Refunds will be processed within 5-7 business days after receiving the returned item.
