Drystar 80/EH500 SSP & Silencer

Edwards DRYSTAR 80 dry vacuum pump is configured for ease of installation and commissioning while providing a clean, robust and cost effective alternative to traditional oil-sealed pumps.

Features and Benefits

  • Extended periods between user intervention to achieve maximum uptime
  • No exhaust filters to service offering lower consumable cost and inventory
  • Available in hydrocarbon or PFPE fluid (for oxygen) versions making it suitable for a wide range of applications and environments
  • Continuous pumping from atmosphere
  • Consistent performance in demanding applications
  • Low noise levels
  • No contaminated oil exposure or spills


  • Vacuum metallurgy processes
  • Heat treatment carburisation
  • Thin film coating technologies
  • Pharmaceutical freeze drying
  • Refrigeration and air conditioning system evacuation, drying, and backfilling
  • Vacuum drying and distillation in chemical industries
  • Backing pump for high vacuum applications
  • Surface treatment and flat panel display
  • R&D
Technical data  
Peak Pumping Speed 50 Hz 390 m3h-1 (230 cfm)
Peak Pumping Speed 60 Hz 471 m3h-1  (277 cfm)
Ultimate Pressure <3x10-3 mbar (<2x10-3 Torr)
Power @ ultimate pressure 4.3 kW (5.6 hp)
Power @ peak pumping load 6.7 kW (9.0 hp)
Electrical supply 200-230V 3Æ 50/60Hz  or  380-460V 3Æ 50/60Hz
Inlet connection ISO100
Outlet connection NW40
Cooling method Water/Air
Cooling Water flow rate 1 lmin-1 (0.26 galmin-1)
Max cooling Water supply pressure 8 bar (116 psig)
Cooling Water DP across pump 2.1 bar (30 psig)
Cooling Water temp 5-35 °C (41-95 °F)
Cooling Water inlet ½” Quick connect coupling
Cooling Water outlet ½” Quick connect plug
Purge gas pressure 0.5 bar (6-8 psig)
Purge gas light duty 15 slm
Purge gas connection ¼” Quick connect coupling
Weight 220 kg (485 lbs)
Noise (with exhaust silencer)  
Exhaust back pressure 1.3 bar (18 psig)
Lubrication volume 1.4 l (0.4 gal)
Hydrocarbon lubrication SHC629 / Ultragrade 20
PFPE lubrication YVAC 25/6 / YVAC 16/6