Varian SD-700

This listing is for a used Varian SD-700 mechanical roughing pump, a larger capacity rotary pump from the same product family used across analytical and research vacuum systems. It served as the primary roughing stage for bringing vacuum chambers and instrument manifolds down to a pressure level where diffusion or turbomolecular pumps could take over the high vacuum duty. With its higher pumping speed relative to smaller siblings in the line, the SD-700 was chosen for applications needing faster pump down of larger chamber volumes, including vacuum furnaces, leak detection systems, and general purpose laboratory vacuum manifolds. Its rugged rotary vane construction was designed for long service life under regular industrial and laboratory use. The unit offered here is used and sold in as is condition, appropriate for technicians supporting existing Varian based vacuum systems or looking for a cost effective replacement pump. It represents a practical option for keeping legacy vacuum equipment operational without the expense of a new unit.