Description

XBD-S type single stage double suction,horizontal firefighting pump set is newly developed according to market needs.Its executive standard is GB6245<Fire pump>,and the most advanced hydraulic model is applied,combining with the characteristics of double suction pump.It is high efficient and energy-saving,reliable performance,easy to install and use.It is used to transport clean water or liquid with physical and chemical property similar to clean water.Max temperature of liquid can not exceed 80℃.

Applications

It has been widely used in fire fighting and living water supply of industry the residence buildings.

Parameter range

Inlet diameter:150-300mm(6"-12")

Capacity:30-200L/s

Head:0.3-2MPa

Rate of rotation:2980r/min,1450r/min

Power:2.2-160kW

Two seal types: stuffing seal or mechanical seal

Structural Characteristics

Both inlet and outlet of XBD-S type pump are below the pump’s axial central line.They are perpendicular with axial line and horizontally placed in the middle of pump casing.There is no need to remove inlet,discharge pipeline and electric motor(or some other motors).The pump rotates clockwise from the direction of the coupling.The pump which rotates anticlockwise can also be manufactured according to the requirements,but it should be specified when ordering.

   XBD-S type pump is mainly made up of pump casing(1),pump cover(2),impeller(3),shaft(4) and double suction seal ring(5),shaft sleeve(6) and bearing(15),etc.Except that the material for the bearing is first grade carbon steel,the remained are all made of cast steel(See the structural drawing of pump).

   Pump casing and pump cover compose an impeller’s working room.The installation vacuum gauge and pipeline bolt hole on the pressure gauge are designed for the inlet and outlet flange.After the static balance test on the impeller,it is fixed with the shaft sleeve and sleeve nuts on both sides.The axial location can be adjusted through the sleeve nut.The impeller’s axial force makes use of the symmetric layout of its vane to keep in balance.The rest little residual axial force is borne by the bearing at the shaft end.

   The pump is supported by two single-row radial ball bearings.The bearing is installed inside the bearing body at both sides of the pump casing,and lubricated with solid lubricant.The double suction seal ring is used to reduce the amount of leakage of water at the pump impeller.

   Pump is directly connected with the electric motor through elastic shaft coupling.(If the transmission with rubber belt must be applied,a support shall be mounted in addition.)

   The shaft seal adopts soft packing seal and mechanical seal.In order to cool down the lubricant seal chamber and also to prevent air from leaking into the pump,a water seal ring is mounted among the stuffing.While pump is running, slight amount of high pressure water passes through the concave groove on the centrally-split surface of pump cover into the packing chamber,which functions as water seal.