Magnetic circulating pumps for use over wide ranges of temperature and pressure

This note presents designs for two inexpensive, magnetic circulating pumps. The first pump is designed for corrosive fluids over wide ranges of temperature, to 700 K, and pressure, to 200 MPa, and for flow rates to 6 cm3/s. The second pump is designed primarily for gases at temperatures to 500 K, pressures from 6 kPa to 20 MPa, and flow rates to 60 cm3/s. Each pump consists of a simple cylinder and piston with a central flow channel and gate operated by sample inertia.