Edwards/nXDS Scroll Pumps - Replacing a Dry Scoll with a Diaphragm
I'm using an Edwards nxds10i on a distillation apparatus and we need to purchase another pump. I want to keep the vacuum oil-free but think a diaphragm pump could work. I can't find a diaphragm pump that achieves <5torr but have read that they exist. Has anyone used a diaphragm to replace a dry scroll at low vacuum? Advise this member.
EMD Millipore/Milli-Q Integral - Not Dispensing
I have a Q-Pod that does not dispense. When I press the trigger, the main unit does not switch from "Ready" to "Dispensing". Looks like the main Integral unit does not get the signal from the Q-Pod to dispense. However, both do happen if I use the foot switch to dispense water. Do I need to replace the entire trigger assembly? Does anyone have a part number? Advise this member.
VirTis/AdVantage 2.0 - Lower limit temp.
The Virtis Advantage 2.0 XL freeze dryer does not achieve the lower limit temperature specification at the shelve and at the condenser. It only drops to - 39oC in the condenser and to -30oC at the shelf. It seemed it was a problem with the refrigerant. Does anyone knows if the refrigerant is responsible for this? I would appreciate information. Advise this member.