FAQs: Diaphragm
Q: Can water be pumped through my unit?
A: No, clean dry air only.
Back to Top
Q: What are the small washers between the valve plate and the body for?
A: They serve as spacing between the retainer plate and the valve plate. They must be kept in the same location to ensure proper alignment.
Back to Top
Q: What kind of oil do I need for my diaphragm unit?
A: None, Gast diaphragm units are oilless, and do not require oil.
Back to Top
Q: Can I pump combustible gas through my MOA?
A: No, none of Gast models are designed to pump combustible gases.
Back to Top
Q: My DOA model was sitting on my shelf for a long time, now it will not start.
A: 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.
Back to Top
Q: What can I use to flush my diaphragm unit with?
A: Gast flushing solvent, AH255D. If this is not available you can use electrical contact cleaner.
Back to Top
Q: Can I use the same kit for new style DOA (dome shaped head) as for the old flat head style?
A: Yes the kit will contain parts for new and old style units.
Back to Top
Q: Can I get new motor brushes for my DC voltage unit?
A: Yes the brushes can be obtained from Gast distributors. Check website sales & distribution for a distributor near you.
Back to Top
Q: Can I replace the motor on my diaphragm unit?
A: The motor can not be replaced in the field, the unit should be sent to an authorized service center.
Back to Top
Q: How can I replace the rod assembly in my diaphragm unit?
A: The rod assembly is not field replaceable, the unit should be sent to an authorized service center.
Back to Top