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Condition:
  New
Part Number:
  P102159
Warranty:
  Agilent Warranty

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$11,328.24


Regular Price: $12,873.00

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Agilent Varian VHS-250 Diffusion Pump ISO-250F inlet, Standard Cold Cap, 120V, 2200W. PN: K0543301


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/cm2/ 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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Specifications
Specification Value
Pumping Speed, Operating Range 2,125 l/s air, 2,660 l/s He/H₂
Maximum Pumping Speed 3,700 l/s air w/standard cold cap; 4600 l/s Helium
Maximum Throughput 2.6 T-l/s (3.5 mbar-l/s) in operating range, 3.5 T-l/s (4.5 mbar-l/s) @ 0.01 Torr
Operating Range 1.2x10⁻³ to < 5x10⁻⁹ Torr (1.6 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 ≥ 17 cfm (29 m³/hr)
Backstreaming Rate < 5.0 x 10⁻⁴ mg/cm²/min (with standard cold cap)
Warmup Time 10 minutes
Cooldown Time 10 minutes (with quick cool coil)
Fluid Charge 500 cc - Exact fluid charge available
Electrical Requirements 1 ph, 50/60 Hz, 120/208/240 VAC
Pump Power 2,200 Watts
Cooling Water Requirements 0.25 gpm (50 l/h)
Water Connections ⅛ in. FPT Tee

VHS-400 Diffusion Pump Replacement Parts List

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Description Part No. Item
Standard Cold Cap Assembly F9584301 1
Sight Glass Repair Kit consisting of: L8908301 2
   Sight Glass L8816001 5.1
   Gasket, Teflon L9694001 5.1
   O-ring, Viton, Parker No. 2-113 CommI 5.1
   O-ring, Viton, Parker No. 2-226 CommI 5.1
Jet Assembly w/Splash Baffle F9548301 3
Splash Baffle (Included in the Jet Assembly Kit) 4
Foreline Baffle Assembly L9172301 5
Baffle Retaining Ring 699992187 6
Thermal Switch Includes: L8912301 7
   Switch (set at 300 °F – 147 °C) 642906025 7a
   Lug 648056680 7b
   Wire 656179100
   Box Insulator 89867001 7d
Heaters (one heater required per pump) 8
   120V / 2200 watt Heater Element 647306125 5.1
   208 V / 2220 watt Heater Element 647306175 5.1
   240 V / 2200 watt Heater Element 647306225 5.1
Heater wire, 10 AWG, 36 inches (3 per pump required) X3901-68002 9
   Lug, Nickel 648056680 10
Heater Clamp Assembly, Includes: 86643301 11
  Heater Cover Plate 86088301 11a
  Heater Insulator 86087001 11b
  Heater Clamp Plate 86086301 11c
Heater Insulation Blanket L8998001 12
Heater Cover L8997001 13
O-Ring Kit includes: K0377178 14
   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 5.1
   10 Viton fill and drain O-rings (new style, Parker No. 2-113 5.1
   1 Sight glass O-ring, Parker No. 2-226 5.1
   1 PTFE gasket 5.1
Screw, Socket hd cap, no. 8-32x1/4, stainless steel Screw 15
Viton Centering ring for ISO inlet flange, 250K IC250SV 16
Centering ring for foreline flange (ASA with 5 inches OD) 17
3/8 Hose 1/8 Pipe Barbed (included with the pump) 18
Ceramic Bushing (included with the pump) 699006025 19
Screw, Rd hd machine, no. 6-32x3/16, stainless steel Screw 5.1
Stud, no. 8-32 x 1/2, stainless steel Stud 5.1
NEOVAC SY diffusion pump fluid, 1000 cc K6948301 5.1
DC-704 diffusion pump fluid, 500 cc (2 required) 695474005
DC-705 diffusion pump fluid, 500 cc (2 required) 695475005
Santovac 5 diffusion pump fluid, 500 cc 695405005
Installation and Operation Manual 699901021

Ideal Spectroscopy offers 3D CAD models in Solidworks (SLDPRT), STP, & STEP formats. For those without CAD software a free trial 3D model viewer with measurement capabilities can be downloaded here:

E-drawing LogoeDrawings Viewer For Windows
E-drawing LogoeDrawings Viewer For MAC.




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CONTACT US
Ideal Spectroscopy
5910 Midway Park Blvd NE,
Albuquerque, NM 87109-5805

Phone: (505) 872-0037
Fax: (505) 872-9001
info@idealspectroscopy.com



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