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

VHS-400 Diffusion Pump

VHS-400 Diffusion Pump
The VHS-400 diffusion pump has a pumping speed of up to 4500 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 great for high vacuum applications. This pump is a perfect fit for industrial applications such as vacuum furnace, heat treatment, metallizing, and coating processes for architectural glass and the automotive industry.

  • 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
  • Four-stage fractionating jet purifies pumping fluid
  • High tolerable forepressure
  • Full thermal protection safeguards against all thermal overloads
  • Finned boiler increases surface area, prolonging pumping fluid life
  • Quick cool coil is standard
  • Foreline baffle prevents fluid loss into backing system
  • Stainless steel body

Part Number Variant

K4816307 VHS-400 diffusion pump, ASA, with standard cold cap, 208 V, 4400 W
K4816308 VHS-400 diffusion pump, ASA, with standard cold cap, 240 V, 4400 W
K4816309 VHS-400 diffusion pump, ASA, with standard cold cap, 480 V, 4400 W
K4816326 VHS-400 diffusion pump, ASA, with standard cold cap, 380 V, 4400 W
L9767307 VHS-400 diffusion pump, ISO 400K, with standard cold cap, 208 V, 4400 W
L9767308 VHS-400 diffusion pump, ISO 400K, with standard cold cap, 240 V, 4400 W
L9767309 VHS-400 diffusion pump, ISO 400K, with standard cold cap, 480 V, 4400 W
L9767326 VHS-400 diffusion pump, ISO 400K, with standard cold cap, 380 V, 4400 W
MSPD11030 VHS-400 diffusion pump, ISO 400K, with standard cold cap, 400 V, 4400 W

New, factory warranted pumps available.

Price: POA, please contact us for latest prices

Manual
View Manual

Backstreaming Rate
1 x 10-3 mg/cm2/min
Cooldown Time
25 min
Electrical Requirements
3 ph
50/60 Hz
208/240/380/480 V
Fluid Charge
1000 CC
Fluid Type
Oil
Input Voltage
208, 240, 380, 480 V
Maximum Forepressure - Full Load
0.55 Torr
0.72 mbar
Maximum Forepressure - No Load
0.65 Torr
0.85 mbar
Maximum Throughput
6.3 T-L/s (8.4 mbar-L/s)
Operating Range
1.4 x 10-3 to <5 x 10-9 Torr
1.9 x 10-3 to <6.5 x 10-9 mbar
Pump Power
4400 W
Pump Weight
180 lbs
81 kg
Pumping Speed - Air
4500 L/s
Pumping Speed - Air, via AVS 4.1 (1963)
8000 L/s
Pumping Speed - He/H2
5625 L/s
Recommended Backing Pump
≥ 30 cfm (51 m3/hr)
Warmup Time
15 min
Water Connections
1/8 inch FPT
Water Cooling - Temperature Requirement
60-80 °F
15-26 °C
Water Cooling Flow Requirement
0.4 gpm
80 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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