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Agilent Varian VHS-250 Diffusion Pump ISO-250F inlet, Standard Cold Cap, 120V, 2200W. PN: K0543301 |
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Agilent Varian VHS-250 Water Cooled Vacuum Diffusion Pump, ISO 250F ASA Bolted Inlet, 13.125 inch OD, Max. Pumping Speed 3700 l/s
Standard Cold Cap, 120 VAC 2200 Watt Heater, Agilent Varian Part Number K0543301.
The Agilent Varian VHS-250 has been designed to fill a special need in applications where high pumping speeds are required and space limitations demand a compact pump. The VHS-250 pump is a rugged, general-purpose unit with an operating range of 1.2 x 10-3 to <5 x 10-9 Torr. The Agilent Varian VHS-250 is ideal for applications requiring fast cycling because of its high pumping speed (maximum rated at 3700 l/s) air combined with high forepressure tolerance (0.65 Torr with no-load and 0.55 Torr when at full gas load). Backstreaming rate of the unit is 1x10-4 mg/cm 2/ min, without the use of any cooled cold cap.
This Agilent Varian VHS-250 Diffusion Pump Includes:
- ISO 250F Inlet Flange (13.25 Inch OD Flange, 12 Smooth Bolt Holes, 0.5" Diameter Holes)
- 1 1/2 inch ASA Outlet Foreline Flange (5 Inch OD)
- Standard Cold Cap
- Recommended Backing/Roughing Pump: 17CFM
- 3700 l/s Maximum Pumping Speed Air
- 120 VAC @ 2200 Watt Heater
- Designed To Be Used With Santovac 5 Diffusion Pump Oil
Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the outlet. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. The Agilent Varian VHS-250 can pump down to pressures of <5x10-9 Torr. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump, roughing pump is typically used to maintain an outlet pressure around 1 mTorr.
These Agilent Varian Diffusion Pumps are very reliable, simple in design and operate with no noise or vibration. Diffusion pumps are still the
most economical means for creating high-vacuum pressures. Diffusion pumps also tolerate operating conditions such as excess particles and reactive gases that
would destroy other types of high-vacuum pumps. They can be ordered with a 1-phase 120, 208, 240 VAC heater harness and with standard or extended cold cap. We stock and sell Santovac 5 diffusion pump fluids for this pump. Please see below in our “Related” section for additional accessories that may benefit your vacuum applications and maintenance needs. We offer a large variety of vacuum greases, oils, vacuum fittings, hoses, vacuum gauges, sensors/transducers, parts and accessories sold separately on this website.
These Agilent Varian VHS-250 diffusion pumps have ISO 250F inlet flange, operate on 1-phase 120 VAC, standard cold cap and has Agilent Varian part number K0543301. The Agilent Varian VHS-250 diffusion pump user's instruction manuals can be downloaded in PDF format below. These are typical stock items that often ship same day as order is placed.
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ITEM |
DESCRIPTION |
PART NO. |
1 |
Standard Cold Cap Assembly |
F9584301 |
2 |
Sight Glass Repair Kit consisting of:
Sight Glass | L8816001 |
Gasket, Teflon | L9694001 |
O-ring, Viton, Parker No. 2-113 | ComI |
O-ring, Viton, Parker No. 2-226 | ComI |
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L8908301 |
3 |
Jet Assembly w/Splash Baffle |
F9548301 |
4 |
Splash Baffle (Included in the Jet Assembly Kit) |
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5 |
Foreline Baffle Assembly |
L9172301 |
6 |
Baffle Retaining Ring |
699992187 |
7 |
Thermal Switch Includes:
7a - Switch (set at 300°F – 147°C) | 642906025 |
7b - Lug | 648056680 |
7c - Wire | 656179100 |
7d - Box Insulator | 89867001 |
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L8912301 |
8 |
Heaters (one heater required per pump)
120 V / 2200 watt Heater Element | 647306125 |
208 V / 2200 watt Heater Element | 647306175 |
240 V / 2200 watt Heater Element | 647306225 |
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9 |
Heater wire, 10 AWG, 36 inches (3 per pump required) |
X3901-68002 |
10 |
Lugs, Replacement, nickel |
648056680 |
11 |
Heater Clamp Assembly, Includes:
11a - Heater Cover Plate | 86088301 |
11b - Heater Insulator | 86087001 |
11c - Heater Clamp Plate | 86086301 |
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86643301 |
12 |
Heater Insulating Blanket |
L8998001 |
13 |
Heater Cover |
L8997001 |
14 |
O-Ring Kit includes:
3 inlet flange O-ring, Butyl No. 2-379 |
3 foreline flange O-ring, Butyl No. 2-332 |
10 Viton fill and drain O-rings (old style), Viton No. 2-112 |
10 Viton fill and drain O-rings (new style, Viton No. 2-113 |
1 Sight glass O-ring, Parker No. 2-226 |
1 PTFE gasket |
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K0377178 |
15 |
Screw, Socket hd cap, no. 8-32x1/4, stainless steel |
Screw |
16 |
Viton Centering ring for ISO inlet flange, 250K |
IC250SV |
17 |
Centering ring for foreline flange (ASA with 5 inches OD) |
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18 |
3/8 Hose 1/8 Pipe Barbed (included with the pump) |
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19 |
Ceramic Bushing (included with the pump) |
699006025 |
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Screw, Rd hd machine, no. 6-32x3/16, stainless steel |
Screw |
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Stud, no. 8-32 x 1/2, stainless steel |
Stud |
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NEOVAC SY diffusion pump fluid, 1000 cc |
K6948301 |
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DC-704 diffusion pump fluid, 500 cc |
695474005 |
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DC-705 diffusion pump fluid, 500 cc |
695475005 |
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Santovac 5 diffusion pump fluid, 500 cc |
695405005 |
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Installation and Operation Manual-download from www.agilent.com/chem/vacuum |
699901021 |
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Product: |
Agilent Varian VHS-250 Diffusion Pump ISO-250F inlet, Standard Cold Cap, 120V, 2200W. PN: K0543301 |
Condition: |
New |
Warranty: |
Agilent Warranty |
Part Number: |
P102159 |
Sale Price: |
$11,328.24
Regular Price: $12,873.00
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