VHS-6
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Available in 4-inch, 6-inch, 250-mm, 10-inch, and 400-mm sizes, the VHS series pumps are the fastest and cleanest diffusion pumps of their size available today. The VHS series patented Bulge Contour doubles gas capture and maintains lower pressure. All VHS series pumps have sight glass/fill and drain assemblies for continuous monitoring and easy maintenance of pump fluid. Finned boilers increase surface area, prolonging pumping fluid life. Full thermal protection and quick-cool coils are also standard. The 4-inch, 6-inch, and 10-inch pumps can be ordered with ASA or ISO flanges, standard or extended cold caps, and a variety of voltages.
- Highest pumping speed available.
- Fluid-level sight glass provides a quick indication of pump fluid status at all times.
- Fill and drain assembly for pump oil.
- Fractionating jet purifies pumping fluid.
- High tolerable forepressure.
- Full thermal protection.
- Stainless steel pump body and jet.
- Finned boiler increases surface area, prolonging pumping fluid life.
| Description | Weight kg (lbs) | Part Number |
| VHS-6 Pump with standard cold cap | ||
| 120 V with ASA flanges | 34.0 (75.0) | 85826301 |
| 120 V with ISO flanges | 34.0 (75.0) | L6193301 |
| 120 V with ConFlat Flanges | 34.0 (75.0) | L6200301 |
| 208 V with ASA flanges | 34.0 (75.0) | 85826306 |
| 208 V with ISO flanges | 34.0 (75.0) | L6193306 |
| 208 V with ConFlat Flanges | 34.0 (75.0) | L6200306 |
| 240 V with ASA flanges | 34.0 (75.0) | 85826302 |
| 240 V with ISO flanges | 34.0 (75.0) | L6193302 |
| 240 V with ConFlat Flanges | 34.0 (75.0) | L6200302 |
| VHS-6 Pump with extended cold cap | ||
| 120 V with ASA flanges | 34.0 (75.0) | 85826311 |
| 120 V with ISO flanges | 34.0 (75.0) | L6193311 |
| 120 V with ConFlat Flanges | 34.0 (75.0) | L6200311 |
| 208 V with ASA flanges | 34.0 (55.0) | 85826316 |
| 208 V with ISO flanges | 34.0 (75.0) | L6193316 |
| 208 V with ConFlat Flanges | 34.0 (75.0) | L6200316 |
| 240 V with ASA flanges | 34.0 (75.0) | 85826312 |
| 240 V with ISO flanges | 34.0 (75.0) | L6193312 |
| 240 V with ConFlat Flanges | 34.0 (75.0) | L6200312 |
| Accessories | ||
| 336 water-cooled baffle with ASA flanges | 7.0 (15.0) | F8277306 |
| 336 water-cooled baffle with ISO flanges | 7.0 (15.0) | F8277307 |
| 336 water-cooled baffle with ConFlat Flanges | 7.0 (15.0) | F8277308 |
| Santovac 5 pump fluid, 500 cc (exact pump charge) | 1.1 (2.5) | 695405005 |
| DC-702 pump fluid, 500 cc (exact pump charge) | 1.4 (3.0) | 695472005 |
| DC-704 pump fluid, 500 cc (exact pump charge) | 1.4 (3.0) | 695474005 |
| DC-705 pump fluid, 500 cc (exact pump charge) | 1.4 (3.0) | 695475005 |
| Centering ring for ISO inlet flange, 200K | 0.5 (1.0) | IC200SV |
| Centering ring for ISO foreline flange, KF50 | 0.2 (0.5) | KC50SV |
| Instruction manual | 699901022 | |
| Replacement Parts | ||
| Heater, 120 V 2200 W (one required per pump) | 0.5 (1.0) | 647306125 |
| Heater, 208 V 2200 W (one required per pump) | 0.5 (1.0) | 647306175 |
| Heater, 240 V 2200 W (one required per pump) | 0.5 (1.0) | 647306225 |
| Heater clamping assembly (includes clamping plate, cover plate, insulator) | 86643301 | |
| Heater clamping plate (one required per pump) | 0.5 (1.0) | 86086301 |
| Heater cover plate (one required per pump) | 1.0 (2.0) | 86088001 |
| Heater (one required per pump) | 0.2 (0.5) | 86087001 |
| Replacement nickel heater wire | 0.5 (1.0) | 656179100 |
| O-ring kit, 3 for inlet (butyl, 2-267), 3 for foreline (butyl, 2-232), 10 for fill and drain (Viton, 2-113) | 0.5 (1.0) | K0377184 |
| Thermal switch (set at 300 °F/147 °C) | 0.5 (1.0) | 642906025 |
| Extended cold cap | 0.5 (1.0) | F6455001 |
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Diffusions Pumps
