The IS clear water centrifugal pump is a single-stage single suction (axial suction) centrifugal pump suitable for industrial and urban water supply, drainage, and agricultural irrigation. The IS pump series has a total of 29 basic types, with 153 performance options available for users to choose from through variable speed and cutting impeller diameter. It is mainly composed of pump body, pump cover, impeller, shaft, sealing ring, shaft sleeve, and suspension bearings.

Overview

The IS clear water centrifugal pump is a single-stage single suction (axial suction) centrifugal pump suitable for industrial and urban water supply, drainage, and agricultural irrigation. Used for transporting clean water below 80 ℃ and liquids with physical and chemical properties similar to clean water. The IS pump series has a total of 29 basic types, with 153 performance options available for users to choose from through variable speed and cutting impeller diameter.

Structural Description

The IS clear water centrifugal pump complies with the marking performance and dimensions specified in the international standard ISO2858, which is equivalent to the national standard GB5662-85. It is mainly composed of pump body, pump cover, impeller, shaft, sealing ring, shaft sleeve, and suspension bearing components.

sealing form

The axial seal of the pump comes in three forms: soft packing seal, mechanical seal, and rubber oil seal.

Scope of application

1. The IS type pump is suitable for industrial and urban water supply and drainage, high-rise building pressurized water supply, garden sprinkler irrigation, fire boosting, long-distance transportation, HVAC refrigeration cycle, bathroom and other cold and warm water circulation boosting and equipment matching, with a service temperature T ≤ 80 ℃.

2. The IS horizontal hot water pump is widely used for boiler hot water pressurized circulation transportation and urban heating systems in metallurgy, chemical industry, textile, papermaking, hotels and restaurants. The ISWR type has a service temperature T ≤ 120 ℃.

3. IS horizontal chemical pump is used for conveying liquids that do not contain solid particles, are corrosive, and have a viscosity similar to water. It is suitable for industries such as petroleum, chemical, metallurgical, power, papermaking, and synthetic fibers, with an operating temperature range of -20 ℃ to+120 ℃.

Component analysis

1. It is mainly composed of pump body, pump cover, impeller, shaft, sealing ring, shaft sleeve, and suspension bearings.

2. The pump body and pump cover of the IS type are divided from the back of the impeller, which is commonly known as the rear opening structure. Its advantage is easy maintenance. During maintenance, the pump body, suction pipeline, discharge pipeline, and motor are not moved. Only the middle connecting piece of the extended coupling needs to be removed to exit the rotor part for maintenance.

3. The pump casing (i.e. pump body and pump cover) constitutes the working chamber of the pump. The impeller, shaft, and rolling bearings are the rotors of the pump. The suspension bearing components support the rotor part of the pump, while the rolling bearings are subjected to the radial and axial forces of the pump.

4. In order to balance the axial force of the pump, most pumps are equipped with sealing rings at the front and rear of the impeller, and balance holes are provided on the rear cover plate of the impeller. Due to the low axial force of some pumps, there are no sealing rings or balance holes on the back of the impeller.

5. The axial sealing ring of the pump is composed of a packing gland, packing ring, and packing to prevent air intake or significant water leakage. If the impeller of the pump is balanced, the cavity containing soft packing is connected to the suction port of the impeller. If the liquid at the inlet of the impeller is in a vacuum state, it is easy to introduce air along the surface of the shaft sleeve. Therefore, a packing ring is installed in the packing chamber through the small hole on the pump cover to guide the pressure water in the pump chamber to the packing ring for sealing. If the impeller of the pump does not have a balance hole, there is no leakage problem due to the liquid pressure on the back of the impeller being greater than atmospheric pressure, so the packing ring can be omitted.

6. To avoid shaft wear, a shaft sleeve protection is installed at the part where the shaft passes through the packing chamber. There is an O-ring seal between the shaft sleeve and the shaft to prevent air intake or water leakage along the mating surface.