This pump with automatic switch,which is controlled by hydraulic pressure.when the hydraulic pressure is low,it wil turn on automatically when the hydraulic pressure is higher than fixed pressure,it will turn off automatically.which is useful and it can automatically offer water for familly use when hydraulic pressure is low.offering water for hotels,restaurants,high building and water tower boosting to offer water to solar water heaters sucking water from wells and ponds,offering circulative water to industrial equipments,garden irrigation and car washing Performance range Flow rate up to 66L/min Head up to 50m model power Max.flow l/min Max.head (m) Max.suct (m) Inlet/outlet (in) Gw kg Packing dimension (mm) kw HP AUTO-316 0.18 0.24 32 30 9 1×1 12 310×235×325 OPERATING LIMITSSuction lift up to 40m Fluid temperature up to 60 oC Maximum ambient temperature 40o