TESTED 5E-7 Torr: Varian Turbo-V 81-T Turbomolecular High Vacuum Pump UHV Includes TV81AG-NAV (Navigator) Controller / Power Supply
High-performance turbomolecular pump package for high and ultra-high vacuum systems. Pump and controller have been tested and run properly; system achieved 5E-7 Torr in our setup, we ran it for about 6 hours.
Included:
-Varian Turbo-V 81-T turbomolecular pump
Part Number: 698905M002
Inlet flange: ISO 63 K
Exhaust flange: KF16
-TV81AG-NAV Navigator controller / power supply
Part Number: 9698995M003
Input: 24 VDC (±10%), 80 W
-Turbo pump cable that runs from controller to the turbo body.
No backing pump, vacuum hardware, or additional cables/accessories included unless shown in photos or explicitly stated. Does not include any of the gauges or fittings from our test stand: those were to demonstrate performance only. If you need parts, we sell gauges, fittings, roughing pump, bellows, and more separately.
Performance (Turbo-V 81-T, specs from the manual):
Pumping speed:
N₂: 77 L/s
He: 65 L/s
H₂: 50 L/s
Compression ratio:
N₂: >7 × 10⁶
He: 5 × 10³
H₂: 3 × 10²
Base pressure (with recommended backing pump):
Mechanical backing: 5 × 10⁻⁹ mbar (3.8 × 10⁻⁹ Torr)
Diaphragm backing: 5 × 10⁻⁸ mbar (3.8 × 10⁻⁸ Torr)
Start-up time: <60 seconds
Max rotational speed: 1350 Hz (≈80k rpm class)
Mechanical / Environmental (info from the manual):
Operating position: any orientation
Cooling: natural convection (optional forced-air fan or water cooling)
Ambient temperature:
Natural convection: +5 to +25 °C
Forced air / water: +5 to +35 °C
Weight (ISO 63 K version): 1.99 kg (4.4 lb)
Electrical (Pump drive via controller)
Output to pump: 60 Vac, 3-phase, up to 1350 Hz
Drive power: 50 W max (at pump)
Backing pump recommendations (OEM guidance)
Mechanical backing: DS42 to DS102 class, or equivalent
Dry backing option: SH100 class, or equivalent
Condition / Test:
Used unit. Tested for proper operation and achieved 5E-7 Torr in our setup. Ultimate pressure you achieve depends on backing pump performance, plumbing conductance, chamber cleanliness, and leak rate.
Keywords:
Varian Agilent Turbo-V 81-T TV81 turbomolecular turbo pump ISO 63 K KF16 UHV high vacuum 24VDC TV81AG NAV Navigator controller 698905M002 9698995M003
