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The EVC-0250 Dry Running Claw pump

The EVC-Series pumps are dry contact-less vacuum pumps with modular constructions consisting of compartments: pumping and gear chambers are separated by using labyrinth seals. As two claws rotate in opposite direction, the air will be sucked in the pumping chamber, compressed and discharged under pressure. Two gears for synchronizing of claws rotation are placed inside the gear chamber and lubricated with appropriate gear oil. A built in anti-suck back valve installed in inlet flange will prevent the air from flowing back into the vacuum chamber when the pump is shutdown. The pumps are directly driven by a flanged motor via a coupling. The claws and compression chamber have a TFE (Teflon) coating to protect the pump against corrosion from water in the pumped gasses.

Advantages to the user:

  • High pumping speed
  • Oil free pumping chamber
  • Corrosion protection by teflon coating
  • Air cooling, no cooling water needed
  • Very little maintenancen needed
  • Non contact claw rotation
  • Direct drive
  • Anti-suck back valve to secure vacuum

Part Number

Ordering information Art.No.
EVC-0250; 3 phase; 400V; 50Hz 604001
EVC-0250; 3 phase; 400V; 60Hz 604002
EVC-0250; No motor 604005
Twin Claw EVCD-0250; 3 phase; 400V; 50Hz 604301


Specification Unit EVC-0250 EVCD-0250
50 Hz 60 Hz 50 Hz
Nominal displacement m3/h 234 282 234
Ultimate vacuum level mbar 50 50 5
Vacuum level continuous running mbar 180 to 1000 180 to 1000 10 to 1000
Motor power kW 4 4,8 5,1
Nominal speed rpm 2850 3450 2850
Noise level dB(A) 78 82 79
Oil capacity gear box housing ltr 0,75 0,75 1,25
Weight approx kg 218 224 350
Admissible ambient temperature °C 5-40 5-40 5-40
Connection inlet G(BSP) 2″ 2″ 2″
Connection outlet G(BSP) 2″ 2″ 1-1/2″


Accessoires Art.No.
Inlet dust filter with paper cartridge G 2″ 50800
Frequency control unit; controlled at vacuum level 604901


Consumables Art.No.
Repair spray coating; can 400ml 10048900
Gasket kit EVC-0250 25049000
Gasket kit EVCD-0250 25049000T
Overhaul kit EVC-0250 25050000
Overhaul kit EVCD-0250 25050000T
Gear box oil type EV-Gear Oil-150 (1 ltr) 100500
Gear box oil type EV-Gear Oil-150 (5 ltr) 100502
Gear box oil type EV-Gear Oil-150 (20 ltr) 100503
Inlet filter replacement cartridge (paper) 508001
Inlet filter replacement cartridge (polyester) 508101
Inlet filter replacement cartridge (inox mesh) 508201
Inlet filter replacement cartridge (activated charcoal) 508301

Pumping speed curve

Pumping speed curve of the EVC-0250 vacuum pump


Dimensions drawing of the EVC-0250 vacuum pump

Dimensions (mm) L W H B C E D F A
EVC-0250 884 698 524 590 167 292 342 249 180
471 2″ 2″ 4xM10