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La empresa, fundada en 1989, es una empresa nacional de alta tecnología integral que integra diseño, investigación y desarrollo, fabricación y servicios; actualmente es una empresa clave en la industria china de bombas centrífugas y una de las grandes fábricas especializadas.
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Product Center
Single-stage hot water pump, simple suction, horizontal type IR
Flow: 3.75-1080m³/h
Lifting height: 4-128m
Power: 0.55-160kw
Efficiency: 23%-85%
Weight of the pump: 40-2100kg
Cavitation margin: 2.0-6.0m
Price: 0.29-3.25 ten thousand
The horizontal single-stage IR type hot water centrifugal pump with single suction is suitable for the supply and drainage of industrial and urban water, it can also be used for agricultural irrigation and drainage and for transporting clean water or other liquids with physical and chemical properties similar to clean water, with a temperature not exceeding 150℃.
Product description
The single suction and single stage hot water pump type IR is an energy-saving pump designed jointly at the national level. It is an updated version of the single-stage centrifugal pumps type BA, BL, and others. Its advantages include: a reasonable hydraulic layout throughout the series, a wide range of options for the user, easy maintenance; efficiency and suction height that reach advanced average international levels. Horizontal single suction pump for hot water. Single stage pump Suitable for the supply and drainage of industrial and urban water, it can also be used for irrigation and agricultural drainage, as well as for the supply and transport of clean water or other liquids with physical-chemical properties similar to clean water, with a temperature not exceeding 150℃.
Product parameters
Performance range and meaning of the single suction, single stage horizontal IR type centrifugal water pump model
Horizontal IR type Single stage pump Simple structure, reliable performance, small size, light weight, good cavitation resistance, low power consumption, easy to use and maintain.
The horizontal single stage IR pump has a wide applicability, with a total of 140 specifications across the series, but only uses four types of shafts; the shafts, bearings, and seals of the same size are interchangeable; the suspension of the entire series of pumps also only has four types.
The pump speed is divided into two types: 2900 and 1450 rpm.
Performance as follows: 2900 rpm 1450 rpm
Maximum flow: 240 m³/min 400 m³/min
Maximum total height: 125 m 55 m
Maximum speed: 3500 rpm (when used with a 60 Hz power supply, the impeller diameter is reduced)
Maximum working temperature: 150℃
Permissible pressure in the suction pipe 0.3MPa, maximum operating pressure of the pump 1.6MPa.
Structural characteristics of the single suction, single stage horizontal IR type centrifugal water pump:
1 pump body, 2 pump cover, 3 Impeller , 4 shaft, 5 seal ring, 6 impeller nut, 7 retaining washer, 8 shaft sleeve, 9 packing, 10 packing ring, 11 packing, 12 suspension bearing components.
The horizontal single stage IR type centrifugal pump is designed according to the national standard ISO2858 in terms of performance and dimensions, mainly composed of the pump body (1), pump cover (2), impeller (3), shaft (4), seal ring (5), shaft sleeve, and suspension bearing components (12).
The horizontal single stage IR type centrifugal pump has a rear opening, and it is not necessary to disassemble the suction and discharge pipes when removing the cover and impeller. The suspension contains two ball bearings lubricated with machine oil or grease. The pump is directly driven by the motor through an elastic coupling. The flow chamber, feet, inlet flange, and outlet flange are cast as a single piece.
The body and cover of the single stage IR type hot water pump are divided from the rear of the impeller, which is called a rear door structure. Its advantage is ease of maintenance, as the pump body, suction pipe, discharge pipe, and motor do not move during maintenance; only the intermediate coupling of the elongated coupling needs to be disassembled to remove the rotor and perform maintenance.
The pump casing (i.e., the body and cover) forms the working chamber of the pump; the impeller, shaft, and bearings are the rotor. The suspension bearing components support the pump rotor, and the bearings support the radial and axial forces of the pump.
To balance the axial force of the pump, most impellers have seal rings in front and behind, and there is a balance hole on the rear plate of the impeller; since some pumps have little axial force, seal rings and balance holes are not installed on the rear of the impeller.
The axial seal ring of the pump is composed of the packing (9), packing ring (10), and packing (11) to prevent the entry of air or water leaks. If the impeller is balanced, the cavity with soft packing is connected to the impeller inlet; if the liquid at the impeller inlet is in a vacuum state, air can easily enter along the surface of the shaft sleeve, so a packing ring is installed in the packing cavity that leads pressurized water from the pump chamber through a small hole in the cover to seal. If the impeller does not have a balance hole, since the pressure of the liquid at the rear of the impeller is greater than atmospheric pressure, there is no vapor leakage problem, so the packing ring is not installed.
To prevent wear of the shaft, a protective sleeve is installed at the point where the shaft passes through the packing cavity; an O-ring seal is installed between the sleeve and the shaft to prevent the entry of air or water leaks along the contact surface.
The transmission mode of the pump is through an elongated elastic coupling connected to the motor. The direction of rotation of the pump, viewed from the drive end, is clockwise.
Installation instructions for the horizontal single suction, single stage centrifugal hot water pump type IR:
I. Assembly and disassembly
Before assembly, it is necessary to first inspect whether the parts have defects that affect assembly and clean them before proceeding.
1. The connection bolts, threaded plugs, etc., can be pre-tightened on the corresponding parts.
2. O-rings, paper gaskets, felts, etc., can be pre-placed on the corresponding parts.
3. Seal rings, packings, packing rings, packing, etc., can be pre-assembled on the pump cover in order.
4. Install the ball bearings on the shaft, then on the suspension, close the cover, tighten the bearings, and place the connection bolts on the shaft.
5. Install the sleeve on the shaft, then install the cover on the suspension, then install the impeller, retaining washer, impeller nut, and tighten them. Finally, install the assembly on the pump body and tighten the connection bolts of the body and cover.
During assembly, special attention should be paid to small parts such as the key, oil tray, water gasket, O-ring seal inside the sleeve, which are easy to lose or assemble in the wrong order.
The disassembly order of the pump can basically be done in reverse order to assembly.
II. Installation
The quality of the pump installation has a significant impact on its operation and lifespan, so the installation and alignment must be done carefully. Dimensions and installation shape of the pump.
1. Installation and alignment:
1) Clean the grease and dirt from the base, place the base on the foundation.
2) Use a level to check the horizontal alignment of the base; shims are allowed for leveling.
3) Fill the base and the anchor bolt holes with cement.
4) After the cement has dried, check if the base and the anchor bolt holes are loose; once adequate, tighten the anchor bolts and recheck the level.
5) Clean the support surface of the base, the surface of the water pump feet, and the motor, and mount the pump and motor on the base.
6) A certain space must be maintained between the couplings; check if the center lines of the pump shaft and the motor are aligned, and use thin washers to adjust and make them concentric.
Measure the difference in the outer diameter of the coupling above and below, left and right, which should not exceed 0.1 mm; the maximum and minimum difference in the space around the end face of the two couplings should not exceed 0.3 mm.
2. Installation instructions:
1) The installation height of the centrifugal pump, the length, diameter, and speed of the pipeline must meet the calculations, aiming to reduce unnecessary losses.
2) For long-distance transport, a larger pipe diameter should be used; the pump's pipe must have its own support, not allowing the weight of the pipe to rest on the pump to avoid damage.
3) If a check valve is installed in the discharge pipe, it should be placed outside the gate valve.
III. Start-up, stop, and operation
1. Start-up:
1) Before connecting the machine, it must be confirmed that the motor's rotation direction is correct and that the pump operates smoothly.
2) Close the check valve in the discharge pipe.
3) Fill the pump with water or prime it with a vacuum pump.
4) Connect the power supply; when the pump reaches normal speed, gradually open the gate valve in the discharge pipe and adjust it to the required working conditions. When the gate valve in the discharge pipe is closed, the continuous operating time of the pump should not exceed 3 minutes.
2. Stop:
1) Gradually close the gate valve in the discharge pipe and cut off the power supply.
2) If the ambient temperature is below 0℃, the water must be drained from the pump to prevent freezing and cracking.
3) If it will not be used for a long time, the pump should be disassembled, cleaned, lubricated, and stored properly.
3. Operation:
1) During start-up and operation, carefully observe the instrument readings, the heating of the bearings, the leakage and heating of the packing, as well as vibrations and noises to verify that everything is normal. If any anomalies are detected, they must be addressed immediately.
2) The maximum temperature of the bearings should not exceed 80℃, and the difference between the bearing temperature and the ambient temperature should not exceed 40℃.
3) The packing must be in normal condition, and the water leakage should be small and uniform.
4) The oil level in the bearings should be maintained at the normal position, neither too high nor too low; if it is low, lubricant should be added in time.
5) If the wear of the space between the sealing ring and the coupling part of the impeller is too large, the sealing ring should be replaced with a new one.
Kind advice: Please refer directly to the performance parameters on the pump selection page.
Why Choose Us?
Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.
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Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。
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