Both IS and IR are designed based on the specifications and performances specified in the International Standard of ISO2858. They consist of the major elements such as Pump casing (1) Pump cover (2) Impeller (3) Shaft (4) Packing ring (5) Shaft sleeve (8) and Overhung part for bearings (9) (see figure I and 1.1)

In both IS and IR, the pump casing and the cover, classified as from the back of the impeller, is so called back-door open structure. As the result of being convenient in access to it, maintenance and repair will be carried out on it with out removing the pump casing. suctionand discharge pipes etc.

Simply, it is after with drawl of the rotor assembly that it can be done.The pump casing (including the cover) constitutes the working chamber of the pump, while the rotor assembly is composed ofimpeller, shaft and roller bearings. The bearings withstand both redial and axial forces from the pump

For most of the pumps, the purpose of the seal rings provided in both frond and back sections of impellers, and holes-called balancingholes drilled in the back covers of impellers is to balance the axial forces from pumps. Those which do not give too much axial forceshave neither seal rings nor balancing holes in the back section of impellers.

IS uses either packing seal or mechanical seal to prevent air from coming or excessive water leakage.

IR' axial seal is either packing seal or mechanical seal to prevent air from coming or too much water leakage. The pump cover isprovided with internal and external sealing liquid holes as well as cooling chamber which has seal rings to prevent cooling water coming

out. Details as per Figure 1.1. The sealing and cooling methods are:

1) Packing seal, internal sealing liquid, not being connected with cooling water.

2) Packing seal, internal sealing liquid, being connected with cooling water.

3) Packing seal, external sealing liquid, not being connected with cooling water

4) Packing seal, external sealing liquid, being connected with cooling water.

5) Mechanical seal, exteral sealing liquid, not being connected with cooling water. (without the internal sealing liquid holes dtilled

when mechanical seals are used)

6) Mechanical seal, external sealing liquid, being connected with cooling water. (without the internal sealing liquid holes dtilled

when mechanical seals are used)Customers will select the sealing and quenching methods listed below according to the application requirements.

Pressure of cooling water P0.15-0.3 MPa. The required amount of sealing liquid is 0.2-0.5m/h: the amount of cooling circulationliquid is 0.3-0.7m2/h. Customers will decide the liquid amount with reference to above-said valuesTo minimize the wear of shaf, the shaft uses a sleeve on the point which is go though the packing box. The shaft sleeve is fixed with a O ring to prevent both air and water coming along the mating surfaces.

Pumps are driven from fexible coupling connected motors The pump rotates clockwise when viewed, standing at the driver end and facing the pump.

Both IS and IR are the single -stage and single-suction centrifugal pumps, used to deliver clean water or the liquids similar to the waterphysically and chemically. IS handles the liquids with temperature not exceeding 80C while the temperature of the liquids handled by IRs not more than I50°C. finding the applications for water feed and supply service in plants, towns and tne uses in farm imrigation.

Both IS and IR are the single -stage and single-suction centrifugal pumps, used to deliver clean water or the liquids similar to the waterphysically and chemically. IS handles the liquids with temperature not exceeding 80C while the temperature of the liquids handled by IRs not more than I50°C. finding the applications for water feed and supply service in plants, towns and tne uses in farm imrigation.

Performances of IS and IR

2900r/min.1450r/min

Speed:

Diameter of inlet:50-200mm

Capacity:3~460m/h

3.6~133m

Head:

Details as per the Performance Tadle

The general working pressure is IMpa. It can reach 1.3MPa if the pump has the inlet in diameters of 65-125mm and the impeller in name diameter of 315 mm. In addition to that, if some other types of materials are used, it will be up to as much as 1.6MPa.

Applicable Standard: GB5662-85 GB/T5657-1995 JB/T5414-91