It is used to suck and deliver clear water and liquids with physical and chemical properties similar to water without solid particles. It is widely used for industrial and agricultural urban drainage, fire water supply, etc. It is used to transport corrosive medium of 20 ℃～ 105 ℃ or medium with physical and chemical properties similar to water.

• Flow: 3.4-1080m ³/ h

• Lift: 3-200m

• Efficiency: 16% - 85%

• Pump weight: 44-160kg

• Motor power: 0.55-160kw

NPSH: 2.0-6.0m

IH type horizontal single-stage chemical centrifugal pump is a single-stage single suction cantilever centrifugal pump. Its marked rated performance point, size and other effects are in accordance with the international standard IS02858-1975 (E). It is an energy-saving product to replace the F type corrosion resistant pump. This series of chemical centrifugal pumps are designed according to the performance, technical requirements and test methods of energy-saving pumps. It is one of the energy-saving pump products promoted in China. It is the scientific and technological personnel of Changsha Zhonglian Pump Co., Ltd. who, together with domestic pump experts, select domestic hydraulic model for design and development. It is used to suck and deliver clear water and liquids with physical and chemical properties similar to water without solid particles. It is widely used for industrial and agricultural urban drainage, fire water supply, etc. It is used to transport corrosive medium of 20 ℃～ 105 ℃ or medium with physical and chemical properties similar to water.

performance parameter 

Performance range and model significance of IH horizontal single-stage chemical centrifugal pump:

Flow Q: 3.4 ～ 1080m3/h Lift H: 3 ～ 200m

Rotating speed n: 980, 2900, 1450 r/min; belt power: 0.55~160 KW

Inlet diameter: 50~200mm High working pressure: 1.6Mpa

IH type chemical pump has 29 basic types, among which 22 double speed (2900 and 1450 r/min) have reached 112 specifications after being cut and modified by impeller diameters of A and B.

Note: In addition to the materials listed in the above table, the manufacturer can also select the materials suitable for manufacturing this series of chemical pumps according to the needs of users. The selected materials and their codes shall conform to GB2100-80 in principle. For materials that have not been specified by the state, it is allowed to use international or domestic common material codes (such as industry or factory standards).

Model description: IH50 － 32 － 125A

50 - Pump suction inlet diameter is 50mm

32 - Pump outlet diameter is 32mm

125 - Nominal diameter of impeller: 125mm

A - Change of impeller outer diameter.

Features of IH type horizontal single-stage chemical centrifugal pump:

IH type horizontal single-stage chemical pump has the advantages of reasonable and reliable hydraulic performance layout, small volume, light weight, good cavitation resistance, low power consumption, convenient use and maintenance, and high work efficiency. IH single-stage chemical pump is of horizontal structure, and its structural design can basically meet the requirements of all pipeline installation.

The conveying medium temperature of IH chemical pump is - 20 ℃～ 105 ℃. If necessary, double end sealing cooling device is used. The conveying medium temperature is 20 ℃～+280 ℃. It is applicable to chemical, petroleum, metallurgy, electric power, paper making, food, pharmaceutical, environmental protection, wastewater treatment, synthetic fiber and other industries to transport various corrosive or non polluting media similar to water.

Structure description of IH type horizontal single-stage chemical centrifugal pump:

　　

　

1 Pump body, 2 impeller nuts, 3 brake pad nuts, 4 seals, 5 impellers, 6 pump covers, 7 shaft keys, 8 packing rings, 9 packing, 10 packing glands, 11 suspension bearing components, 12 shafts.

The pump cover of IH type stainless steel chemical centrifugal pump is fixed on the middle bracket through the spigot, and then the pump cover is clamped in the middle through the connection between the pump body and the spigot of the middle bracket. The pump body is axially inhaled, radially discharged, foot supported, and can be directly fixed on the base. The suspension components are fixed on the middle bracket through the seam, and supported on the base with the suspension bracket. For the convenience of disassembly, an extended coupling is designed, so that the inlet and outlet connecting pipes, pump body and motor can not be disassembled during maintenance. It is only necessary to remove the intermediate coupling of the coupling to exit the rotor components for maintenance. This is an international common structural form.

The rotation direction of ih single-stage chemical pump: the pump is directly driven by the motor through the extended coupling, and it rotates clockwise from the motor end.

Packing seal: the pump cover is equipped with a stuffing box, which is sealed with soft packing. The stuffing box can be filled with water with a certain pressure for sealing cooling, lubrication and cleaning.

Mechanical seal: single end face mechanical seal and double end face mechanical seal. A certain pressure of water is introduced into the seal chamber to wash the friction surfaces at both ends and simultaneously play a cooling role.

Packing seal or mechanical seal shall be adopted for the pump, which shall be applicable by the user according to the needs. At the same time, it is allowed to adopt shaft seal type suitable for the size of sealing cavity and other structures specified in ISO3069, such as mechanical seal with bellows and auxiliary impeller seal.

Instructions for single-stage chemical pump:

1. Preparation before starting

(1) Clean the pump and site before starting.

(2) Check whether the amount of lubricating oil in the bracket is appropriate (the oil level is about 2mm from the center line of the oil level gauge) and whether the oil level gauge is intact.

(3) Before coupling is not connected, check the rotation direction of the prime mover, and connect the coupling after it is consistent with the rotation arrow of the pump.

(4) After the mechanical seal or packing and the coupling are installed, the pump shaft can be easily rotated by hand without friction, and the protective cover of the coupling shall be installed.

(5) The pump shall be used when suction is on, and the pump shall be filled or vacuumized before starting; The pump is used under the condition of reverse filling. Before starting, the pump shall be filled with the liquid conveyed. After the air in the pump is removed, the gate valve of the discharge pipe shall be closed.

(6) Check whether the foundation bolts are loose before starting. Whether the gland is skewed, and the supply of lubricating oil and cooling water.

2. Start

(1) Close the inlet and outlet pressure (or vacuum) gauge and water outlet valve (if there is a bypass pipe, it should also be closed at this time.) Start the motor (jog it first and confirm the correct rotation direction of the pump before starting the formal operation.), Then open the inlet and outlet pressure (or vacuum) gauge. When the pump reaches the normal speed and the instrument indicates the corresponding pressure, slowly open the outlet valve and adjust it to the required working condition. When the discharge pipeline is closed, the pump shall not work continuously for more than 3 minutes.

(2) During the starting process, pay attention to the power reading of the prime mover and the vibration of the pump at all times. The vibration number should not exceed 0.06 mm. The measured position is the bearing seat.

(3) Sealing condition: the mechanical seal shall be free of leakage and heating, and the packing seal shall be in continuous trickle state.

3. Run

(1) Frequently check the heating of the pump and motor (the temperature rise of the bearing should not exceed 75 ℃) and the oil supply of the oil level gauge. (Generally, the lubricating oil shall be replaced every 1500 hours of operation).

(2) The suction valve cannot be used to regulate the flow to avoid cavitation

(3) The pump should not operate continuously at less than 30% of the design flow. If it is necessary to operate continuously under this condition, a bypass pipe should be installed at the outlet to discharge the excess flow.

(4) Pay attention to whether there is noise during pump operation. If abnormal conditions are found, they should be eliminated or stopped for inspection.

4. Stop

(1) Slowly close the gate valve of the discharge and outlet pipeline (if the pump is used under the condition of reverse flow, the gate valve of the suction pipeline shall also be closed), and close the switches of various instruments.

(2) Cut off the power

(3) If external liquid introduction is adopted for sealing, the external liquid introduction valve shall also be closed.

(4) If the ambient temperature is lower than the freezing point of the liquid, the liquid in the pump shall be drained to prevent frost cracking.

(5) If the pump is shut down for a long time, in addition to discharging the corrosive liquid in the pump, all parts shall be disassembled and cleaned, especially the sealing chamber. It is good to dismantle the pump and reinstall it after cleaning. In addition to oil anti rust treatment and sealing the pump inlet and outlet, regular inspection should also be carried out.

Mechanical seal maintenance:

1. As mechanical seals are generally suitable for use in clean media free of suspended particles, newly installed pipeline systems and liquid storage tanks should be carefully flushed to prevent solid impurities from entering the mechanical seal end face and causing seal failure.

2. In the medium easy to crystallize, the mechanical seal shall be washed frequently. Clean the crystals on the mechanical seal before restarting after shutdown.

3. The mechanical seal shall be disassembled carefully and shall not be knocked with hammer or iron to avoid damaging the sealing surfaces of the dynamic and static rings.

4. If dirt cannot be removed, try to remove the dirt, and then remove it after flushing to avoid damaging the sealing element.

5. Before installing mechanical seals, check all sealing elements for failure or damage, and repair or replace them if any.

6. The relative friction sealing surface of the moving ring and the stationary ring shall be strictly checked, and no fine scratches, bruises and other defects are allowed. All other parts, including pump body, impeller, seal chamber, etc., shall be cleaned before assembly, especially the end faces of moving and stationary rings, which shall be carefully wiped with clean, soft cloth or cotton yarn, and then coated with a layer of clean grease or oil.

7. During assembly, attention shall be paid to eliminating deviation. When fastening screws, they shall be tightened evenly to avoid deflection and seal failure.

8. Correctly adjust the compression amount of the spring. After the pump is installed, when you pull the rotor by hand, you should feel that the seal spring has a certain compression amount, but it can rotate quickly and flexibly without the feeling of biting. If it feels too tight or does not move, it should be loosened properly.

9. For mechanical seals with external flushing, the flushing fluid shall be turned on before starting to fill the sealing cavity with sealing fluid. When stopping, stop the pump first, and then turn off the sealing flushing fluid.