Varian M-6 (M6) Vacuum Diffusion Pump ASA-6"

Posted by:

testeqe

Location:

Arizona

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SOLD

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Description:

Varian M-6 Vacuum Diffusion Pump ASA-6"

The unit is sold as-is, untested. Looks to be rebuilt but I can't guarantee it. It is extremely clean inside.

The Unit's Serial Number Tag Reads:
Model Number: M6
Serial Number: DT-122998

Description:
The M-Series pumps have the lowest backstreaming rate of all unbaffled diffusion pumps on the market – ten times better than that of other pumps. As a result of this superior performance, it is often possible to use the M-Series pumps without traps or baffles. (When these components are added, however, the degree of cleanliness at the inlet of the topmost component is greater than that possible with many other pumping systems.)

The standard cold cap, which intercepts over 99% of backstreaming vapor, has been designed to stay colder by more efficient heat transfer, and it is easy to install and maintain. All M-series pumps have full thermal protection** against inadequate cooling water, low pumping fluid, and high system pressure. Finned boilers increase surface area, prolonging fluid life.

Specifications:
Previous Model Number: 0188
Pump Speed (Operating Range):
Air: 1,500 l/s
Hydrogen: 1,800 l/s
Helium: 1,800 l/s
Maximum Forepressure:
No Load: 0.70 Torr (.91 mbar)
Full Load: 0.60 Torr (.78 mbar)
Maximum Throughput:
In Operating Range: 1.5 T-l/s (2.0 mbar-l/s)
@ 1 x 10-2 Torr (1.3 x 10-2 mbar): 2.4 (3.1)
Minimum Recommended Backing Pump for Maximum Throughput: 11 cfm (19 m3/hr)
Backstreaming Rate at Inlet Flange: 1 x 10-4 mg/cm2/min (standard cold cap)
Warmup Time: 12
Cooldown Time: 20 minutes (10 minutes with Quick Cool Coil, where applicable)
Fluid Charge: 400 cc
Electrical Requirements: Single Phase, 120/208/240 V, 50/60 Hz
Power: 1785 Watts
Cooling Water at 60-80°F (15-26°C): 0.2 gpm (40 l/hr)