Single stage, close coupled, volute pump with in line suction and discharge ports of identical diameter. The pump is of the top pull out design, i.e. the power head (motor, pump head and impeller) can be removed for maintenance or service while the pump housing remains in the pipework. Pipework connection is via 150 psi ANSI flanges (not included). The pump is fitted with a fan cooled, permanent magnet synchronous motor. The motor includes a frequency converter and PI controller in the motor terminal box. This enables continuously variable control of the motor speed, which again enables adaptation of the performance to a given requirement. The pump is fitted with a combined temperature and differential pressure sensor.