Precision Vacuum Services Ltd
TEL: 01342 716234
info@precisionvacuumservices.co.uk
Precision Vacuum Services Ltd

VHS-250 Diffusion Pump

VHS-250 Diffusion Pump
The VHS-250 diffusion pump has a pumping speed of up to 2125 L/s. All VHS series pumps have sight glass/fill and drain assemblies for continuous monitoring and easy maintenance of pump fluid. The patented Bulge Contour increases gas capture and maintains lower pressure. Finned boilers increase surface area, prolonging pumping fluid life.

This vapor jet pump is a perfect fit for high vacuum and industrial applications such as vacuum furnace, heat treatment, metallizing, and coating processes for optical lenses, electronics and protective film layers.

  • Patented Bulge Contour increases gas capture
  • Fluid-level sight glass provides quick indication of pump fluid status at all times
  • Fill and drain assembly for easy maintenance of pump fluid
  • Fractionating jet purifies pumping fluid for cleaner operation
  • High tolerable forepressure
  • Full thermal protection safeguards against all thermal overloads
  • Stainless steel pump body and jet
  • Finned boiler increases surface area, prolonging pumping fluid life
  • Quick cool coil is standard

Part Number Variant

K0543301 VHS-250 diffusion pump, ISO 250F, with standard cold cap, 120 V, 2200 W
K0543302 VHS-250 diffusion pump, ISO 250F, with standard cold cap, 240 V, 2200 W
K0543306 VHS-250 diffusion pump, ISO 250F, with standard cold cap, 208 V, 2200 W
MSPD10874 VHS-250 diffusion pump, ISO 250F, with standard cold cap, 440 V, 2200 W, with oil temperature sensor
MSPLD10709 VHS-250 diffusion pump, ISO 250F, with standard cold cap, 380 V, 2200 W

New, factory warranted pumps available.

Price: POA, please contact us for latest prices

Manual
View Manual

Backstreaming Rate
5 x 10-4 mg/cm4/min
Cooldown Time
10 min
Electrical Requirements
1 ph
50/60 Hz
120/208/240 V
Fluid Charge
500 CC
Fluid Type
Oil
Input Voltage
120, 208, 240 V
Maximum Forepressure - Full Load
0.55 Torr
0.72 mbar
Maximum Forepressure - No Load
0.65 Torr
0.85 mbar
Maximum Throughput
2.6 T-L/s (3.5 mbar-L/s)
Operating Range
1.2 x 10-3 to <5 x 10-9 Torr
1.6 x 10-3 to <6.5 x 10-9 mbar
Pump Power
2200 W
Pump Weight
75 lbs
34 kg
Pumping Speed - Air
2125 L/s
Pumping Speed - Air, via AVS 4.1 (1963)
3700 L/s
Pumping Speed - He/H2
2660 L/s
Recommended Backing Pump
≥ 17.0 cfm (28.9 m3/hr)
Warmup Time
10 min
Water Connections
1/8 inch FPT
Water Cooling - Temperature Requirement
60-80 °F
15-26 °C
Water Cooling Flow Requirement
0.25 gpm
50 L/hr



Unit 47 Rowfant Business Centre
Wallage Lane
Crawley
West Sussex
RH10 4NQ
Tel: 01342 716234

info@precisionvacuumservices.co.uk



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