The GAST DAA-P503-GD at Kinequip is a compact, oil-less diaphragm compressor/vacuum pump designed for quiet, low-vibration operation, making it ideal for noise-sensitive environments. It features rugged construction, corrosion-resistant materials, and maintenance-free oversized bearings for long service life. The unit operates at cool temperatures and includes thermal protection, a muffler for vacuum applications, and a motor capacitor. It supports both 50Hz and 60Hz frequencies with a maximum pressure of 60 psi and a 100% duty cycle.
Key Features:
- Oil-less operation: Clean, maintenance-free performance ideal for sensitive environments.
- Quiet and low-vibration: Designed for noise-sensitive applications like medical and lab use.
- Durable construction: Built with corrosion-resistant materials for long service life.
- Dual function: Operates as both a compressor and vacuum pump.
- Thermally protected: Prevents overheating for safe, continuous operation.
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.
