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Horizontal Multistage PumpS CM4-40 60HZ
This is a utility pump features 4 gallons per minute water flow, the pressure switch is set to 45PSI. So easy that automatically opens when turning on the water tap, and stops turning off the water tap. This utility pump is safe and smooth. It has certified to CE, is stable and durable, smooth self-priming with silent operation, and can run dry without damage.
Our Utility pump features 115V AC water pump, can pump up to 4 gallons per minute. It is designed for keeping your swimming pool, fish tank and other liquid filled containers clean and comfortable. Safe and smooth, our pump has certified to CE, is stable and durable, thermal overload protection (temperatures above 70℃/ 158℉ temporarily stop working), recommend to turn off the power and wait for the temperature to drop before coming into service again.
Product parameters
| 60Hz | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model | Model | Driving motor P2(KW) | Q (m3/h) | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 | 7.0 | 8.0 |
| CM4-40 | CHLF4-40 | 1.1 | H(m) | 52 | 50 | 42 | 38 | 32 | 28 | 20 |
About this item
Utility Pump Features
115V AC water pump features 4 gallons per minute water flow, the pressure switch is set to 45PSI, 1.3 Max amps. So easy that automatically opens when turning on the water tap, and stops turning off the water tap.
Safe and Smooth
Our pump has certified to CE, is stable and durable, smooth self-priming with silent operation, and can run dry without damage, thermal overload, and ignition protection( temperatures above 70℃/ 158℉ temporarily stop working ), recommend to turn off the power and wait for the temperature to drop before coming into service again. Tip: To avoid leakage to the pump rotor in case of some product failure, the correct operation is to put the pump head down or flat during when installation.
Industrial Workmanship
features industry standard fittings, power plugs, and aluminum alloy mounting bases to directly replace similar common water pressure pumps. Please connect all parts closely to avoid leakage or combine seal tape with our pump strainer to better prevent leaks on pipes and plumbing.
Wide Application
Great for use in the kitchen and bathroom. It is also a great partner for the camper, sprayer, garden sprinklers, fertilizers, sprinkler faucets, and agricultural irrigation as you like.
Why You Choose Us
High-quality homes and industrial facilities should be available to everyone. You'll get 1 x AC Diaphragm Water Pump, 1 x 1/2 inch Twist-on Water Strainer (includes 50 mesh stainless steel screen), 2 x Hose Fittings, 1 x User Manual, and 1 x Box Container.
Whether the pump vibrates abnormally is an important index to evaluate whether the pump quality is reliable. There are many reasons for the vibration of the multi-stage pump, such as the influence of water flow, the complexity of fluid movement, dynamic and static balance, high-speed rotating parts, etc., which may affect the stability of the pump. Here is a comprehensive analysis of the reasons for the vibration of the pump.
10 causes of vibration
Shaft
The pump shaft is very long, which is easy to cause friction between moving parts (transmission shaft) and stationary parts (sliding bearing or ring) due to insufficient pump stiffness, too large deflection, poor shafting straightness, etc., resulting in pump vibration. The pump shaft is too long, which is greatly affected by the impact of flowing water in the pool, resulting in increased vibration of the underwater part of the multi-stage pump, excessive clearance of the balance plate of the pump shaft, or improper adjustment of axial work displacement, It will also cause the shaft to move at low frequency, causing the bearing bush to vibrate, and the eccentricity of the rotating shaft will also lead to the bending vibration of the shaft.
Foundation and pump support
The contact fixing form adopted between the driving device frame and the foundation is not good, and the foundation and motor system have a poor ability to absorb, transmit and isolate vibration, resulting in the vibration of the foundation and motor exceeding the standard, the foundation of the water pump is loose, or the water pump unit forms an elastic foundation during installation, or the foundation stiffness is weakened due to oil-soaked bubbles, and the water pump will produce another critical speed with a phase difference of 1800 from the vibration, Thus, the vibration frequency of the water pump increases. If the increased frequency is close to or equal to the frequency of an external factor, the amplitude of the multi-stage pump will increase. In addition, the foundation anchor bolts are loose, resulting in the reduction of restraint stiffness, which will aggravate the vibration of the motor.
Coupling
The circumferential spacing of the connecting bolts of the coupling is poor, the symmetry is damaged, and the extension joint of the coupling is eccentric, which will produce eccentric force, the taper of the coupling is out of tolerance, and the static or dynamic balance of the coupling is not good, the elastic pin and the coupling are too tight, so that the elastic pin loses its elastic adjustment function, resulting in the coupling can not be well aligned, and the fitting gap between the coupling and the shaft is too large, The mechanical wear of the coupling rubber ring leads to the decline of the fitting performance of the coupling rubber ring, and the quality of the transmission bolts used on the coupling is different from each other. These reasons will cause multi-stage pump vibration.
Factors of the pump itself
Asymmetric pressure field generated by impeller rotation; Eddy current in the suction pool and inlet pipe; The occurrence and disappearance of vortex in impeller, volute, and guide vane; Vibration caused by vortex caused by a half-open valve; The outlet pressure distribution is uneven due to the limited number of impeller blades; Flow separation in impeller; Surge; Pulsating pressure in the flow passage; Cavitation; When water flows in the pump body, there will be friction and impact on the pump. For example, the water hits the diaphragm tongue and the leading edge of the guide vane, causing vibration; The boiler feed pump conveying high-temperature water is prone to cavitation vibration; The pressure pulsation in the pump body is mainly caused by the sealing ring of the pump impeller. The clearance of the sealing ring of the pump body is too large, resulting in large leakage loss and serious backflow in the pump body, which in turn leads to the imbalance of the axial force of the rotor and pressure pulsation, which will enhance the vibration.
In addition, for the stainless steel hot water pump delivering hot water, if the preheating of the pump is uneven before starting, or the sliding pin system of the pump is not working normally, resulting in the thermal expansion of the pump set, it will induce severe vibration in the starting stage; If the internal stress of the pump body from thermal expansion cannot be released, it will cause the change of the stiffness of the shaft support system. When the changed stiffness is an integral multiple of the angular frequency of the system, resonance will occur.
Motor
The motor structural parts are loose, the bearing positioning device is loose, the iron core silicon steel sheet is too loose, and the support stiffness of the bearing decreases due to wear, which will cause vibration. Uneven distribution of rotor mass caused by eccentric mass, rotor bending, or mass distribution problems, resulting in excessive static and dynamic balance.
In addition, the cage bar of the rotor of the squirrel cage motor is broken, causing the imbalance between the magnetic field force on the rotor and the rotating inertia force of the rotor, causing vibration, motor phase loss, unbalanced power supply of each phase and other reasons can also cause vibration. Due to the operation quality of the installation process, the resistance between the windings of the motor stator is unbalanced, resulting in an uneven magnetic field and unbalanced electromagnetic force, which becomes an exciting force and causes vibration.
Pump selection and variable condition operation
Each pump has its rated operating point. Whether the actual operating condition is consistent with the design condition has an important impact on the dynamic stability of the pump. The water pump operates stably under design conditions, but when it operates under variable conditions, the vibration is increased due to the radial force generated in the impeller, the single pump is improperly selected, or the two types of pumps are not matched in parallel. These will cause the vibration of the multi-stage pump.
Bearing and lubrication
The stiffness of the bearing is too low, which will reduce the first critical speed and cause vibration. In addition, the poor performance of the guide bearing leads to poor wear resistance, poor fixation, and excessive bearing clearance, which also easy to causes vibration. The wear of the thrust bearing and other rolling bearings will aggravate the longitudinal displacement vibration and bending vibration of the shaft at the same time. Lubrication faults caused by the improper selection of lubricating oil, deterioration, excessive impurity content, and poor lubrication pipeline will worsen the working conditions of bearings and cause vibration, and the self-excitation of motor sliding bearing oil film will also produce vibration.
Pipeline and its installation and fixation
The outlet pipe support of the pump is not rigid enough, and the deformation is too large, causing the pipe to press down on the pump body, causing the pump body and the motor to be neutral damaged. The pipe has too much competition during the installation process, the internal stress is large when the inlet and outlet pipelines are connected with the pump, the inlet and outlet pipelines are loose, the restraint stiffness drops or even fails, and the outlet channel is partially broken, the debris gets stuck on the impeller, and the pipeline is not smooth, such as the airbag at the outlet, and the water outlet valve falls off, Or not open, intake air, uneven flow field, pressure fluctuations, these reasons will directly or indirectly lead to the vibration of multi-stage pump and pipeline.
Coordination between parts
The concentricity of the motor shaft and the pump shaft is out of tolerance. The coupling is used at the connection of the motor and the transmission shaft. The concentricity of the coupling is out of tolerance. The wear of the design gap between the dynamic and static parts becomes larger, the gap between the intermediate bearing support and the pump barrel exceeds the standard, and the seal ring gap is inappropriate, resulting in imbalance and uneven gaps around the seal ring, such as the ring groove or the diaphragm groove, This will happen. These adverse factors can cause multi-stage pump vibration.
Impeller
The quality of the pump impeller is eccentric, and the quality control during the manufacturing process of the impeller is not good. For example, the casting quality and machining accuracy are unqualified, or the transmitted liquid is corrosive, and the impeller channel is scoured and corroded, resulting in the eccentricity of the impeller. Whether the number of blades, outlet angle, wrap angle, and the radial distance between the throat tongue and the outlet edge of the impeller of the water pump impeller are appropriate. In use, the initial friction between the impeller ring and the pump body ring of the multi-stage pump, and between the interstage bushing and the diaphragm bushing gradually turns into mechanical friction and wear, which will aggravate the vibration of the multi-stage pump.
Application field
① In the production of chemical and petroleum sectors, most of the raw materials, semi-finished products, and finished products are liquids, and the production of semi-finished and finished raw materials into semi-finished products and finished products needs to go through complex technological processes. During these processes, pumps play a role in transporting liquids and providing pressure flow for chemical reactions. In addition, in many installations, pumps are used to adjust the temperature.
② In agricultural production, pumps are the main irrigation and drainage machinery. my country's rural areas are vast, and a large number of pumps are needed in rural areas every year. Generally speaking, agricultural pumps account for more than half of the total output of pumps. Pumps are also the most used equipment in the mining and metallurgical industries. The mine needs to be drained by pumps, and in the process of beneficiation, smelting, and rolling, pumps are needed to supply water.
③ In the power sector, nuclear power plants need nuclear main pumps, secondary pumps, and tertiary pumps, and thermal power plants need a large number of boiler feed pumps, condensate pumps, oil and gas mixing pumps, circulating pumps, and ash pumps.
④ In national defense construction, the adjustment of aircraft flaps, tail rudders, and landing gear, the rotation of warships and tank turrets, and the ups and downs of submarines all require pumps. High pressure and radioactive liquid, and some also require the pump without any leakage.
⑤ In short, whether it is aircraft, rockets, tanks, submarines, drilling, mining, trains, ships, or everyday life, pumps are needed everywhere, and pumps are running everywhere. That's why the pump is listed as a general-purpose machine, which is a major product in the machinery industry.
⑥ Electric pumps i.e. pump driven by electricity. The electric pump is composed of a pump body, a water lift pipe, a pump base, a submersible motor (including cables), and a starting protection de
