Welcome to the new VACPRO website:

“Optimising your vacuum process”

Diffstak - Vapour Diffusion

Edwards Diffstak

The Edwards Diffstak vapour diffusion pumps are compact, water-cooled pumps with integral cooled baffles which provide exceptionally clean pumping.

Compact

Compact water-cooled diffusion pumps

Wide pumping ranges

From 135 (N2) to 3200 l/s (H2)

Valved or Unvalved

Integral high-vacuum valve fitted as standard. Manual or pneumatic valve options.

Exceptionally clean

Integral cooled baffles offer exceptionally clean pumping with very low backstreaming

Proven

With thousands of pumps installed

Diffstak sizes

Pumping speed (Nitrogen)

Pumping speed (Hydrogen)

Minimum backing pump displacement

Oil charge capacity

Heater power

l/s

l/s

m³/h

ml

W

Edwards 63/150

63/150

M y P

135

200

5

60

450

Edwards 63/150C

63/150

C

150

225

5

60

450

Edwards 100/300

100/300

M y P

280

500

5

125

650

Edwards 100/300C

100/300

C

150

225

5

60

450

Edwards 160/700

160/700

M y P

700

1300

12

250

1350

Edwards 160/700C

160/700

C

760

1410

12

250

1350

Edwards 250/2000

250/2000

M y P

2000

3000

40

500

2250

Edwards 250/2000C

250/2000

C

2130

3200

40

500

2250

The compact water-cooled Diffstak pumps with an integral cooled baffle offer exceptionally clean pumping with very low backstreaming, reduced outgassing, and a reduction in the number of elastomer seals required for installation.

This pump has a manually operated high vacuum isolation valve and is supplied with: NW10 elbow, NW10 centering-ring, NW10 clamp, water pipe couplings and ferrules, inlet ISO63 Co-Seal.

Product Features

NOOOOOTHREE PROVEN DESIGNS

they are supplied in three types: standard, manually operated (M-model pumps), standard pneumatically operated (P-model pumps) and unvalved (C-collar model pumps).

xxxxOIL FREE

ensures clean vacuum, low power and low vibration.  the use of magnetic bearings eliminates all hydrocarbon lubricants.

VIBRATION FREE

magnetic levitation means no friction and thus extremely low vibration, in addition this remains constant and does not change as parts wear.

AUTOMATIC BALANCING SYSTEM

Edwards 5-axis pumps are able adjust the magnetic field dynamically to take out rotor imbalances.

MAINTENANCE FREE

zero friction means no wear and thus no routine maintenance is required in normal operation.