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Agilent Varian VHS-400 Diffusion High Vacuum Pump - REBUILT

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Manufacturer Part Number: K4816307
Price: $6,700.00
Quantity:
Agilent Varian VHS-400 Diffusion High Vacuum Pump - REBUILT
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Agilent Varian VHS-400 Diffusion High Vacuum Pump - REBUILT

The Agilent Varian VHS Series bulge contour increases gas capture and maintains lower pressure for the process. These VHS diffusion pumps have sight glass/fill and drain assemblies for continuous monitoring and easy maintenance of pump fluid. Finned boilers increase surface area, prolonging fluid life. Full thermal protection and quick-cool coils are also standard. Please let us know if you would like a quote for a different heater voltage or for repair service of your pump.

We also carry Agilent Varian diffusion pump LN2 traps and baffles and valves.

Questions? Please call our toll free number at 866-332-0500 or send an email to our sales team!

Optimum operating range 1 x 10-3 to < 5 x 10-9 Torr
1.3 x 10-3 to < 6.5 x 10-9 mbar
Pumping speed (air), maximum 8,000 l/s (w/ standard cold cap)

Throughput (air), max. overload range @ 1 x 10-2 Torr (1.33 x 10-3 mbar)    

8 Torr-l/s
10.6 mbar-l/s
Forepressure, max. (5 Torr l/s (1.33 x 10−3 mbar))
No load

Full load


0.65 Torr
0.87 mbar
0.55 Torr
0.73 mbar
Backstreaming rate at pump inlet (within optimum operating range) < 1.0 x 10-3 mg/cm2/min (w/ standard cold cap)
Electrical requirements AC, 50/60 Hz, 3 phase 208V, 240V, 380V, 480V
Cooling water flowrate @ inlet temperature of 60 to 80 °F (120°F max.) .5 gpm (US)
Warmup time 17 min.
Cooldown time
w/out quick cool
w/ quick cool

65 min.
22 min.
Fluid charge 1,000 cc
Recommended backing pump capacity 30 cfm
Pressure drop across coils 6 psi
Heater circuit resistance L1-L2/L2-L3/L1-L3
19.6/19.6/39.2 Ohms at 208V
26.2/26.2/52.4 at 240V
65.6/65.6/131.2 at 380V
104.7/104.7/209.4 at 480V
Weight 180 lbs (81 kg)
Jet assembly 4-stage, self-aligning aluminum
Foreline baffle Stacked self-aligning half moon
Water connections 1/8" FPT
Thermal switches Manual reset at 300°F (148.9°C)
Clearance (for heater removal) 6" minimum
Materials Body - stainless steel
Flanges, foreline baffle - stainless steel
Body cooling coils - copper
Quick cooling coil - stainless steel
Cold cap - nickel-plated copper

Request for Quote

Need modifications to this item? PTB Sales' expert team of engineers can configure products to your specific needs. Please follow the above link, and fill out the quote form.

Agilent Varian VHS-400 Diffusion High Vacuum Pump - REBUILT

K4816307  ASA w/ standard cold cap 208V
K4816326  ASA w/ standard cold cap 380V
K4816309  ASA w/ standard cold cap 480V
K4816308  ASA w/ standard cold cap 240V
L9767307  ISO w/ standard cold cap 208V
L9767326  ISO w/ standard cold cap 380V
L9767309  ISO w/ standard cold cap 480V
L9767308  ISO w/ standard cold cap 240V

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