VHS-4 Diffusion Pump (CAT#: AM-LE-0624-Y)

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

Pumping rate, working range Pumping rate, AVS4.1 (1963): 750 L/s air, 940 L/s helium and hydrogen 1200 L/s air
Maximum pumping volume: 1.5 T L/s within the working range, 2.5 T L/s at 0.01 Torr
Operating range: 2 x 10^-3 to less than 5 x 10^-9 torr
Maximum pre-stage withstand voltage: no load: 0.65 torr, full load: 0.55 torr
Oil return rate, standard cooling cap: less than 5 x 10^-4 mg/cm2/min
Warm-up time: 10 min
Cooling time: 10 minutes (using quick cooling coil)
Oil injection volume: 300 cc
Electrical requirements: single-phase, 50/60 Hz, 120/208/240 VAC
Pump power: 1450 W
Cooling water requirement: at 60-80 ℉ (15-26 °C), the pumping speed is 0.15 gpm (30 L/h)
Connection water cooling: 1/8 inch FPT tee

• High level withstand voltage
• Overheating protection
• Can reach the highest pumping speed
• Stainless steel pump body and nozzle
• Pump oil injection and discharge assembly
• Fractionating nozzle can purify pump oil
• Finned heating plate design increases surface area and extends pump oil life
• Oil level sight glass can quickly indicate the status of pump fluid at any time