they provide high flow rates. Principal types of positive-displacement vacuum pumps include piston, diaphragm, rocking-piston, rotary-vane, lobed-rotor, rotary-screw, and liquid-ring designs.

Series 1207 WOB-L piston pumps are designed for pressure and vacuum needs in a variety of ... hardcoated aluminum cylinder, and high-performance piston seals of a PTFE compound.

The new block-mounted billet-piston pumps represent the first completely ... or E85. The design is a high-pressure, variable-displacement one. It utilizes a pressure regulator but does not require ...

and high-frequency peristaltic rough vacuum pumps. A 24-stage microscale rough pump that uses tiny micromachined hexagonal compartments, where each element of the array is either a pump or a valve.

U-M's high-vacuum pump was a microplasma sputter-ion ... It is essentially a piston-type pump, with active inlet and outlet valves. This pump was actuated and powered by pneumatic actuators ...