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Agilent Varian VHS-250 - REBUILT

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Manufacturer Part Number: K0543306
Agilent Varian VHS-250 - REBUILT
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Agilent Varian VHS-250 - REBUILT

Agilent Varian VHS-250 Diffusion High Vacuum Pump - REBUILT (0178)

The Agilent Varian VHS Series bulge contour increases gas capture and maintains lower pressure for the process. These VHS diffusion pumps have sight glass/fill and drain assemblies for continuous monitoring and easy maintenance of pump fluid. Finned boilers increase surface area, prolonging fluid life. Full thermal protection and quick-cool coils are also standard. Please let us know if you would like a quote for a different heater voltage or for repair service of your pump.

We also carry Agilent Varian diffusion pump LN2 traps and baffles and valves. 

Questions? Please call our toll free number at 866-332-0500 or send an email to our sales team!

Agilent Varian VHS-250

Power rating 2,200 Watts
Optimum operating range (Torr) 7 x 10-4 to < 5 x 10-9 (9 x 10-4 to < 6 x 10-9 mbars)
Maximum pumping speed (l/s) Air – 3,700 with std cold cap; Helium – 4,600
Maximum throughput (Torr-l/s) 2.6 (3.5 mbar-l/s) in operating range
3.5 (4.5 mbar-l/s) @0.01 Torr
Maximum forepressure No Load – 0.65 Torr (.87 mbars)
Full Load – 0.55 Torr (.73 mbars)
Backstreaming rate at pump inlet 5 x 10-4 mg/cm2/minute (with std cold cap)
Electrical requirements 120, 208, 240; 50/60 Hz; single-phase
Warmup time 10 minutes
Cooldown time (using quick cool coil)     10 minutes
Fluid charge 500 cc
Cooling water requirements Maximum inlet temperature – 60/80°F (15 - 26°C)
Maximum outlet temperature at foreline – 120°F (48.9 °C)
Flow rate - 0.25 gpm
Pressure drop across coils 15 psi
Backing pump size 17 cfm for maximum throughput
Recommended jet assembly 4-stage, self-aligning, stainless steel
Foreline baffle Stacked half moon
Cold cap Nickel-plated copper
Water connections 1/8" FPT
Thermal switches Manual reset at 300°F / 149°C
Environmental Maximum ambient temperature 113°F / 45°C
Installation Indoor use, installation category 2, pollution degree 2
Altitude 6,562’ (2,000 m)
Heater circuit resistance (ohms) 2,200 watts
120 V – 6.5
208 V – 19.6
240 V – 26.1
Clearance (for heater removal) 6" minimum
Materials Body, flanges, foreline, baffle – stainless steel
Jet assembly – stainless steel
Body cooling coils – copper
Quick cooling coil – stainless steel
Cold cap – nickel-plated copper
Weight 75 lbs

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Need modifications to this item? PTB Sales' expert team of engineers can configure products to your specific needs. Please follow the above link, and fill out the quote form.

Agilent Varian VHS-250 Diffusion High Vacuum Pump - REBUILT

K0543301 / K0543-301  ISO w/ standard cold cap 120V
K0543306 / K0543-306  ISO w/ standard cold cap 208V
K0543302 / K0543-302  ISO w/ standard cold cap 240V