HS-16

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.

• Five-stage fractionating jet purifies pumping fluid
• High throughput, 9600-watt version available
• High tolerable forepressure
• Full thermal protection
• Fill and drain assembly for pump oil
• Fluid-level sight glass provides quick indication of pump fluid status at all times
• Standard gauge port (NW-25) below inlet flange included
• Foreline baffle prevents loss of fluid into backing pump system
• Optional halo baffle reduces backstreaming without adding height
• Optional quick cool coil

Technical Specifications

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 (see page 30 of catalog)

* For an explanation of pumping speed measurements, please see catalog page 36.
** Refer to catalog page 34 for a description of test methods

Speed Curve Graph

Pumping Speed/Cold Cap Pumping speed/Halo Baffle Throughput

Outline Drawing