Oil Free Vacuum Pumps FAQ
Browse through some common questions about the Oil Free Vacuum Pumps:
| 1. | | What service kit do I need for my VACUUBRAND®-manufactured pump? | |
Please refer to the table below to find the service kit for your VACUUBRAND-manufactured pump.
| Pump model | Service Kit |
MD4 NT, MV2 NT, MD4 NT VARIO, MV2 NT VARIO
| 696861 |
MD4C NT,PC201 NT, MD4C NT, PC3003, PC3004 VARIO
| 696870 |
ME2C NT
| 696878 |
ME4 NT, MZ2 NT, MZ2 NT VARIO
| 696860 |
ME4C NT
| 696864 |
ME8 NT
| 696862 |
ME8C NT
| 696867 |
ME2
| 696810 |
ME2C
| 696813 |
ME4, MZ2, ME4P, ME4R, MZ2D
| 696811 |
ME4C, Tyro12
| 2 x 696813 |
ME8, MZ4, MD4
| 696812 |
ME8C
| 4 x 696813 |
ME16, MZ8, MD8
| 2 x 696812 |
ME16C
| 8 x 696813 |
MZ2C, MZ2C VARIO™, PC101, PC510,
PC511, PC520, PC2002 VARIO
| 696814 |
MZ4C, MD4C, MD4C VARIO™, PC201,
PC610, PC611, PC620, PC2004 VARIO
| 696815 |
MD12, MV10
| 696390 |
MZ8C, MD8C, PC2008 VARIO, MD12C,
MD12C VARIO, MV10C, MV10C VARIO, PC2010
| 696821 |
MD1
| 696824 |
MD1C, PC301, PC2001 VARIO™
| 696828 |
MV2
| 696834 |
PC2003 VARIO™
| 696829 |
Savant GP110
| 696817 |
Savant OFP400
| 696823 |
|
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| | 2. | | Can you cross Pump X from Supplier Y to one of your diaphragm pumps? | |
| It depends. For certain applications, like freeze drying, diaphragm pumps can not achieve the ultimate vacuum required to perform the task. In these cases, we can suggest our low-maintenance RC6 chemistry-Hybrid pump as an alternative. However, for most laboratory applications, selecting the best pump for an application requires a bit more information that just telling which rotary vane pump you used to use, so that you don’t pay more than you need to, but get the correct accessories as well. Try our Vacuum Selection Guide, or call our Customer Service department to get a customized recommendation for your application. |
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| | 3. | | My application requires 27 inches of mercury. All your measurements are in millibar. What pump do I need? | |
| Relative inches of mercury is a unit that references atmospheric pressure, which literally is as variable as the weather. While accurate enough for fluid movement applications, it’s a poor unit to use for most lab applications. Our Vacuum Selection Guide contains a vacuum unit calculator that will convert these units, assuming standard atmospheric pressure of 760 torr. 27 inches of mercury translates to approximately 100 mbar. Our ME series single stage diaphragm pumps would be able to achieve that vacuum level. |
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| | 4. | | Can I retrofit a stand/catchpots/condensers/controllers to my pump? | |
| Unfortunately it is not possible to retrofit solvent recovery glassware to our pumps. However we do offer controllers that will work with your diaphragm or rotary vane vacuum pump, regardless of manufacturer. |
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| | 5. | | What do I need to order to fit a hose barb on my vacuum pump that comes with a flange fitting? | |
Order from this chart:
| Pump |
Hose
Inner
Diameter |
Catalog # (aluminum) |
Catalog # (polypropylene) |
MD4 NT, MZ2D NT
|
¼”
(6mm) |
662510 |
— |
MD4 NT, MZ2D NT
|
3/8”
(10mm) |
662511 |
662806 |
ME16, ME16C, MD8 NT, MD8C NT, MD12, MD12C, MV10, MV10C
|
3/8”
(10mm) |
662517 |
662807 |
ME16, ME16C,, MD12, MD12C, MV10, MV10C,
|
½”
(12mm) |
662518 |
— |
ME16, ME16C, MD12, MD12C, MV10, MV10C
|
5/8”
(15mm) |
662519 |
662808 |
|
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| | 6. | | Why do I need a separate solenoid valve and vacuum fitting for my CVC3000 controller? | |
Because the CVC3000 is designed to be operated with a huge span of vacuum pumps, we offer several different valves to go with it. Having a separate valve and vacuum fitting also allows the controller and valve to be located at their optimal positions for best vacuum control, and not just what is convenient for the controller. Additionally, while controllers that shut the pump off to control vacuum are less expensive, they can allow condensation inside the pump and produce additional strain on the pump upon restart.
If you would like to purchase a controller with a solenoid valve attached as a single unit, you can purchase our CVC3000E C3, catalog number 2614120. |
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| | 7. | | Which of your gauges should I choose for my vacuum pump? | |
| In general, our DVR2 gauge works well with nearly all of our diaphragm pumps. However, for four stage pumps (MV series), like the MV2 NT, or MV10C, the DCP3000 + VSK3000 will be able to register the deeper vacuum provided by these pumps. The DCP3000 + VSP3000 can also be chosen for the ability to mount the gauge head separately from the display or because it uses line current rather than battery power. The DCP3000 + VSP3000 is an excellent choice for rotary vane pumps and roots pumps. |
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| | 8. | | How do I select a cold trap coolant? | |
| To select the proper coolant for your cold trap, you need to consider several things
* The temperature of the coolant
* Your pump - in particular the vacuum level at which it operates,
* The vapor pressure of your solvent at the temperature of your coolant.
For example, dry ice has a temperature of -78.5 Celsius. Acetone has a vapor pressure at that temperature of approximately 0.5 mbar. So, when operated with a two-stage rotary vane pump, with an ultimate vacuum of approximately 0.001 mbar, a dry ice trap would not be effective. A better choice would be liquid nitrogen, with a temperature of -196 Celsius.
Of course, a dual-stage rotary vane pump would be overkill to evaporate acetone. If a single-stage diaphragm pump, with an ultimate vacuum of 70 millibar was used to evaporate acetone, a dry ice trap would be considerably more effective.
To know whether your cold trap is being effective or not, the efficiency can be calculated by weighing your sample before and after drying to determine the mass of the evaporated solvent. This can be compared to the mass of the liquid collected in the cold trap. All of the solvent that is not collected in the cold trap can be assumed to enter the pump. In the case of a rotary vane pump, it can be assumed to be contaminating the oil. |
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Can't Find the Answer You're Looking For?If you're having trouble finding the information you want, BrandTech Customer Service is here to help. Call us at 888-522-2726, or if you prefer, contact us online.
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