Available in 2 in. and 16 in. through 35 in. sizes, the low-cost HS-series pumps provide high speed, low ultimate pressure, high throughput, high tolerable forepressure, and low backstreaming. The HS-Series diffusion pumps come with full thermal protection and optional quick-cool coils. The 16 in. through 35 in. pumps come with sight glass/fill and drain assemblies, and are available with ASA or ISO flanges.
| Pumping speed, operating range | 6,000 l/s air, 7,500 l/s He and H2 |
| Pumping speed*, AVS 4.1(1963) | 10,000 l/s air |
| Maximum throughput | 8,100 W – 9.5 T-l/s (12.7 mbar l/s) in operating range13.5 T-l/s (18.0 mbar-l/s) @ 0.01 Torr |
| 9,600 W –12.0 T-l/s (16 mbar l/s) in operating range 11.5 T-l/s (15.3 mbar-l/s) @ 0.01 Torr | |
| Operating range | 2 x 10-3 to <5 x 10-8 Torr at 9,600 W (1.3 x 10-3 to <6.5 x 10-8 mbar) |
| Maximum forepressure | No load – 0.65 Torr (0.85 mbar), Full Load – 0.55 Torr (0.72 mbar) |
| Pump power | 8100/9600 watts |
| Recommended backing pump | ≥ 80 cfm (136 m3/hr) |
| Backstreaming rate**, standard cold cap | <1.5 x 10-3 mg/cm2/min |
| Warmup time | 30 minutes |
| Cooldown time | 48 minutes (30 minutes with optional quick cool coil) |
| Fluid charge | 3 quarts (2.8 liters) |
| Electrical requirements | 3 ph, 50/60 Hz, 240/415/480 VAC |
| Cooling water requirements | 1.5 gpm (300 l/hr) at 60-80 °F (15-26 °C) |
| Water connections | 1⁄4 in. FPT Tee |
| Recommended fluid | DC-704 |
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