Diffstak 250/2000C

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.

The Edwards Diffstak 250 (ISO250 inlet) design has been proven over many years with thousands of pumps installed. 
This pump has an unvalved ISO collar inlet flange and is supplied with: NW40 elbow, NW40 centering-ring, NW40 clamp, water pipe couplings and ferrules, inlet ISO 250 trapped ‘O’ ring.

Dane techniczne
Pumping speed
          nitrogen 2130 l s-1
          hydrogen 3200 l s-1
Min backing pump displacement* 40 m3h-1
Recommended backing pump E2M40
Recommended fluid Santovac® 5
Fluid charge (dry) 500 ml
Inlet connection compatible with ISO250
Backing connection NW40
Cooling water connection 10 mm compression fittings
Heater power 2.25 kW
Min cooling-water flow at 20°C 180 l h-1
Weight 46 kg

* For maximum throughput