Sewage source heat pump parameters: Pump performance parameters polarization (1) flow range: generally Q = 0.2 ~ 10000m3 / h, now there is a trend toward polarization, the Swedish ABS pump submersible sewage pump maximum flow Q = 25000m3 / h, while the Spanish Bomba. Elias company's submersible sewage pump minimum flow Q = 0.02m3 / h. (2) Head: generally h = 10 ~ 100m, the development of the two poles is particularly evident, the United States sent Branch pump submersible sewage pump lift the highest h = 150m, while the United States Disco Fowler submarine sewage pump up to the highest head can reach h = 400m. Japan EIM Electric Industrial Co., Ltd. submersible sewage pump lift minimum h = 1m. (3) motor power: submersible sewage pump motor power, generally 1 ~ 600kW, Bomba, Spain. Elias minimum power of 0.08kW, while the Swiss ABS pump pump motor maximum power 900kW. (4) through the maximum size of solids: Submersible sewage pump allows the maximum particle size through the solid, usually d = 50 ~ 150mm , While the sewage pump manufactured by the Ferulva Pump Company in Germany allows the maximum particle size d = 35mm, and the maximum diameter of the solid matter passing through the submersible sewage pump of the US Disco Fowler Company reaches d = 460mm.