shielding circulation pumps have motors with sealed structure. The lubrication action between bearing and shaft can be implemented without other equipments because the operating parts are all submerged into water, even more the conveying liquid can also cool the motor in the meantime. There are 3 levels on the switch of junction box to adjust the rotation speed of motor. Feature: The pump works almost without noise due to the device of sliding bearing. The heat-durable seal material used herein enables the pump to operate under the temperature from 2c to 110c Protection class: Xps3-6 ip44 xps7-7 ip42 insulation class: H Application: 1. Circulation pipeline 2. Water-heat system 3. Obturation-patterned industrial circulation system Working condition: Soften water thin, clean, non-corrosive, non-explosive liquids without solid granules, fibres and mineral oil. Medium temperature: 2-110c; Ambient temperature: 2-40c. The former temperature must be higher than that of the latter so as to avoid short circuit caused by dewing on the pump body. Power: Single-phase 220v, frequency 50hz Inlet pressure: 0. 5bar(0. 05mpa) Max. Operating pressure: 10 bar(1mpa) Installation: Installed in a covered and protected area to avoid damages from weather or accident.