- Highest pumping speed available for its height.
- Fluid-level sight glass provides quick indication of pump fluid status at all times.
- Fill and drain assembly for pump oil.
- High throughput, 5100-watt version available.
- Four-stage fractionating jet purifies pumping fluid.
- High tolerable forepressure.
- Full thermal protection.
- Finned boiler increases surface area, prolonging pumping fluid life.
- Quick cool coil is standard.
- Foreline baffle prevents fluid loss into backing system
Technical Specifications
| Pumping Speed, Operating Range Pumping Speed, AVS 4.1 (1963) | 4,500 l/s Air, 5,625 l/s He/H2 8,000 l/s Air |
| Maximum Throughput | 6.3 T-l/s (8.4 mbar l/s) in operating range 7.5 T-l/s (10.0 mbar l/s) @ 0.01 torr |
| Operating Range | 1.4 x 10-3 to <5 x 10-9 torr (1.9 x 10-3 to <6.5 x 10-9 mbar) |
| Maximum Forepressure | No Load: 0.65 torr (0.85 mbar) Full Load: 0.55 torr (0.72 mbar) |
| Recommended Backing Pump | ≥30 cfm (51 m3/hr) |
| Backstreaming Rate, Standard Cold Cap | <1.0 x 10-3 mg/cm2/min |
| Warmup Time | 15 minutes |
| Cooldown Time | 25 minutes |
| Fluid Charge | 1,000 cc |
| Electrical Requirements | 3 ph, 50/60 Hz, 208/380/480 VAC |
| Pump Power | 4400 watts |
| Cooling Water Requirements | 0.40 gpm (80 l/hr) |
| Water Connections |
|
Speed Curve Graph
Pumping Speed Throughput
Outline Drawing
| Description | Weight kg (lbs) | Part Number |
| VHS-400 Pump with standard cold cap | ||
| 208 V with ASA flanges | 75.0 (180.0) | K4816307 |
| 208 V with ISO flanges | 75.0 (180.0) | L9767307 |
| 240 V with ASA flanges | 75.0 (180.0) | K4816308 |
| 240 V with ISO flanges | 75.0 (180.0) | L9767308 |
| 380 V with ASA flanges | 75.0 (1800) | K4816326 |
| 380 V with ISO flanges | 75.0 (1800) | L9767326 |
| 480 V with ASA flanges | 75.0 (1800) | K4816309 |
| 480 V with ISO flanges | 75.0 (1800) | L9767309 |
| Accessories | ||
| DC-702 pump fluid, 500 cc (two required) | 1.4 (3.0) | 695472005 |
| DC-704 pump fluid, 500 cc (two required) | 1.4 (3.0) | 695474005 |
| DC-705 pump fluid, 500 cc (two required) | 1.4 (3.0) | 695475005 |
| Centering ring for ISO inlet flange, 400K | 0.5 (1.0) | IC400SV |
| Centering ring for ISO foreline flange, 63K | 0.5 (1.0) | IC63SV |
| Instruction manual | 699901023 | |
| Replacement Parts | ||
| Heater, 208 V 2200 W (two required per pump) | 0.5 (1.0) | 647310140 |
| Heater, 208 V 2550 W (two required per pump) | 0.5 (1.0) | 647310145 |
| Heater, 240 V 2200 W (two required per pump) | 0.5 (1.0) | 647310150 |
| Heater, 240 V 2550 W (two required per pump) | 0.5 (1.0) | 647310155 |
| Heater, 380 V 2200 W (two required per pump) | 0.5 (1.0) | 647310160 |
| Heater, 380 V 2550 W (two required per pump) | 0.5 (1.0) | 647310165 |
| Heater, 480 V 2200 W (two required per pump) | 0.5 (1.0) | 647310170 |
| Heater, 480 V 2550 W (two required per pump) | 0.5 (1.0) | 647310175 |
| Heater crush plate (one required per pump) | 1.0 (2.0) | K7667001 |
| Heater clamping plate (one required per pump) | 0.5 (1.0) | K4928001 |
| Replacement nickel heater wire | 0.5 (1.0) | 656179100 |
| O-ring kit, 1 for inlet (butyl, 2-385), 1 for foreline (butyl, 2-338), 10 for fill and drain (Viton, 2-113) | 0.5 (1.0) | K0377189 |
| Thermal switch (set at 300 °F/147 °C) | 0.5 (1.0) | 642906025 |
US 930 
CN 156 
MY 112 
AU 83 
GB 57 
AP 47 
CA 45 
IE 42 
