page 77 of 88
Assembling the connecting hose (MZ 2D NT)
19
20
17
MD 4CRL NT:
➨
Note
: Always perform a leak test using an appropriate leak detector
(e.g., helium leak detector) after opening the pump! Leak rate (inte-
gral) see “Technical data”, pg. 25.
If the pump does not achieve the ultimate vacuum:
- Whenever the diaphragms and valves have been replaced, a break-in
period of several hours is required before the pump achieves its ulti-
mate vacuum.
- In case of an unusual noise, switch off pump immediately and check
clamping disc positions.
If the specified ultimate vacuum is not achieved, and if this does not
change after the break-in period:
Check hose connectors at pump heads for leaks. If necessary recheck
valve seats and pump chambers.
Checking the ultimate vacuum
➨
After any intervention at the equipment (e.g., repair / maintenance)
the ultimate vacuum of the pump has to be checked. Only if the pump
achieves its specified ultimate vacuum, the pump’s leak rate is low
enough to ensure that no explosive atmospheres will occur in the inte-
rior of the equipment.
17 mm
20 mm
Summary of Contents for ME 2 NT
Page 34: ...page 34 of 88 ME 4 NT 1 5 3 2 6 4 ME 4 NT ME 4S NT 1 5 3 2 6 4 fig ME 4 NT ...
Page 35: ...page 35 of 88 ME 4R NT 9 5 3 6 12 8 10 11 10 4 13 MZ 2 NT MZ 2S NT fig MZ 2 NT 5 3 2 6 4 1 ...
Page 36: ...page 36 of 88 MZ 2D NT 5 3 2 6 4 ME 8 NT ME 8S NT 2 5 3 2 6 4 1 1 ...
Page 37: ...page 37 of 88 6 MD 4 NT MV 2 NT fig MD 4 NT 1 5 3 4 2 7 MV 2 NT 1 5 3 4 2 7 6 14 MD 4S NT ...
Page 38: ...page 38 of 88 MD 4CRL NT 5 3 2 7 6 14 4 1 ...
Page 61: ...page 61 of 88 4 5 6 Clean 20696877 20696860 20696861 20696862 20696868 20696859 20696870 ...
Page 62: ...page 62 of 88 7 8 9 1 2 ...
Page 64: ...page 64 of 88 12 13 14 Pay attention to washers Assemble same number and thick ness ...
Page 66: ...page 66 of 88 18 19 20 23120788 ME 8 NT MD 4 NT MV 2 NT ...
Page 67: ...page 67 of 88 21 22 23 ...
Page 70: ...page 70 of 88 1 20 17 2 3 Checking diaphragms and valves MZ 2D NT 5 4x 17 mm 20 mm ...
Page 74: ...page 74 of 88 10 size 2 1x Replacing the valves and assembling the pump heads MZ 2D NT 11 12 ...
Page 75: ...page 75 of 88 13 14 15 ...