HS-20 Diffusion Pump (CAT#: AM-LE-0629-Y)

The HS-20 Diffusion Pump is manufactured by Agilent Technologies, the HS series pumps are available in 2-inch and 16-inch to 35-inch sizes and feature high speed, low ultimate pressure, high pumping capacity, high front endurance, and low oil return.

Pumping rate, operating range: 10000 L/s air, 12500 L/s helium and H2
Pumping rate, AVS4.1 (1963): 17500 L/s air
Maximum pumping volume: 12.5 T L/s in the working range, 18 T L/s at 0.01 Torr
Operating range: 1.3 x 10-3 to 5 x 10-8 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 1.5 x 10-3 mg/cm2/min
Warm-up time: 45 minutes
Cooldown: 85 minutes
Oil injection volume: 4.7 L
Electrical requirements: 3-phase, 50/60 Hz, 240/415/480 VAC
Pump power: 12000 W
Cooling water requirement: at 60-62.22°C (15-26°C), the pumping speed is 1.5 gpm (300 L/h)
Connection water cooling: 1/4 inch FPT tee
Recommended pump oil: DC-704

• Five-stage fractionation nozzle purifies the pump oil and ensures a better ultimate vacuum
• High level of withstand voltage
• Overheating protection
• The liquid level sight glass can quickly indicate the condition of the pump oil at any time
• Pump oil injection and discharge assembly
• Provide a standard gauge port (NW-25) under the inlet flange
• Foreline baffle prevents pump oil from entering the foreline pump system and causing loss
• Optional halo baffle water-cooled cap can reduce backflow without increasing height

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