VHS-400 Diffusion Pump (CAT#: AM-LE-0631-Y)

The VHS-400 Diffusion Pump is manufactured by Agilent Technologies. VHS series pumps are available in various sizes of 4 inches, 6 inches, 250 mm, 10 inches, and 400 mm, and are the fastest and cleanest products in the same size diffusion pumps today.

Pumping rate, working range Pumping rate, AVS4.1 (1963): 4500 air, 5625 L/s helium/hydrogen, 8000 L/s air
Maximum pumping volume: 6.3 T L/s within the working range, 7.5 T L/s at 0.01 torr
Operating range: 1.4 x 10^-3 to less than 5 x 10^-9 torr
Maximum pre-stage pressure: no load: 0.65 torr (0.85 mbar) full load: 0.55 torr (0.72 mbar)
Oil return rate, standard cooling cap: less than 1.0 x 10^-3 mg/cm2/min
Warm-up time: 15 minutes
Cooling time: 25 minutes
Oil injection volume: 1000 cc
Electrical requirements: 3 phase, 50/60 Hz, 208/380/480 VAC
Pump power: 4400 W
Cooling water requirement: 0.40 gpm (80 L/hr)
Connection water cooling: 1/8 inch FPT tee

• Can reach the highest pumping speed at the same height
• The liquid level sight glass can quickly indicate the condition of the pump oil at any time
• Pump oil injection and discharge assembly
• 5100 watt high airborne type is available
• Four-stage fractionation nozzle can purify pump oil
• High level of withstand voltage
• Overheating protection
• Finned heating plate design increases surface area and extends pump oil life
• Quick cooling coils are standard parts
• The front stage baffle prevents pump oil from entering the front stage system and causing loss

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