Overview
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 63 (ISO63 inlet) design has been proven over many years with thousands of pumps installed. The unvalved Diffstak's are for systems requiring the highest possible ultimate vacuum or for those which do not need a high vacuum valve.
This pump has an unvalved ISO collar inlet flange and is supplied with: NW10 elbow, NW10 centering-ring, NW10 clamp, water pipe couplings and ferrules, inlet ISO 63 Co-Seal.
* For maximum throughput
The Edwards Diffstak 63 (ISO63 inlet) design has been proven over many years with thousands of pumps installed. The unvalved Diffstak's are for systems requiring the highest possible ultimate vacuum or for those which do not need a high vacuum valve.
This pump has an unvalved ISO collar inlet flange and is supplied with: NW10 elbow, NW10 centering-ring, NW10 clamp, water pipe couplings and ferrules, inlet ISO 63 Co-Seal.
Technical Data
| Pumping speed | |
| nitrogen | 150 l s-1 |
| hydrogen | 225 l s-1 |
| Minimum backing pump displacement * | 5 m3h-1 |
| Recommended backing pump | RV5 |
| Recommended fluid | Santovac® 5 |
| Fluid charge (dry) | 60 ml |
| Inlet connection compatible with | ISO63 |
| Backing connection | NW10 |
| Cooling water connection | 6 mm compression fittings |
| Heater power | 0.45 kW |
| Minimum cooling-water flow at 20 °C | 42 l h-1 |
| Weight | 5 kg |
* For maximum throughput
US 6877 
GB 6619 
AU 6053 
CA 5997 
IE 4042 
NZ 2058 
VN 1257 
BR 649 
