These pumps, for instance Edwards 18B4A and 30B5A, provide a higher backing vacuum to the high vacuum pump. They are used in processes that require a high throughput of gases or where a higher ultimate vacuum is required. This oil can give many years of trouble-free service. Additionally, AP201 is highly resistant to traces of moisture in the gases being pumped. The high boiler pressure required to generate 10-5 torr is achieved without excessively high temperatures.
Low viscosity makes draining and cleaning a minimal chore.
Apiezon AP201 is exceptionally rugged and can tolerate numerous exposures to atmospheric gases. Ask for special price for 20 litre drum if required. Gives excellent vacua in single and dual stage mechanical pumps. 20 litres Price . . Grease L is a petroleum hydrocarbon grease, containing no additives.