Technical upgrade of acid and alkali resistant self-priming pump: Choose corrosion-resistant raw materials, acid and alkali resistance, corrosion resistance, and the materials are FRPP and PVDF Self-priming design-self-priming power is particularly strong, self-priming up to 20ft; Structure: The back cover and the foot are integrally formed, and the self-priming bucket and the main body are integrally formed, which is convenient to install, reduces leakage points, has higher strength and longer life; The impeller adopts one-piece injection molding, no welding points, higher efficiency and stable performance; The ribs on the back of the back cover are designed to be strengthened to prevent cracking under high-pressure environments; The screw hole is designed with a large R, which can disperse the pressure and prevent cracking;
Select corrosion-resistant raw materials, acid and alkali resistance, strong alkali resistance, corrosion resistance, and the materials are FRPP and PVDF;
The impeller adopts one-piece injection molding, no welding points, high efficiency and stable performance Saiken acid and alkali resistant self-priming pump MA series manufacturers, with a variety of calibers, complete power, and non-standard customization. The MA series of SEKEN dry-running self-priming pumps have a head up to 40 meters and a flow rate of 1000L/min.
When using asphalt insulation pumps, you must formulate strict technical maintenance specifications. The fuel filter works for 100 hours and the fuel tank works for 500 hours. Clean each time. If the filter element is found to be damaged and replaced in time, it must not be removed and the DC type is adopted. Fuel supply. The mating parts should be disassembled and inspected once after 500 hours of work under normal working conditions. When disassembling and inspecting the asphalt pump, ensure that the premises, hands, tools and cleaning oil are clean to avoid contamination of the parts. Don’t knock and hit randomly during the disassembly operation, don’t pile it up when cleaning, and wash it with other non-matched parts to avoid bumps and scratches. When assembling, it is not allowed to change the assembly position at will to achieve certain purposes that do not meet the requirements of the machine’s work. Understand the structural characteristics and working principle of the mating parts, strengthen and improve the maintenance, operation and use of the mating parts, so as not to adjust at will when there is no fault, not to disassemble at will during maintenance and use, not to knock and beat during maintenance and inspection, and during cleaning and maintenance. Do not rub or touch randomly, and do not change or screw randomly during assembly and adjustment. Everything is carried out in accordance with the technical requirements of the asphalt insulation pump specification to achieve the purpose of extending its service life. When installing the oil valve seat and the nozzle cap, they should be tightened according to the specified torque to ensure the good technical condition of the assembled fuel injector and fuel injection pump. Asphalt pump manufacturers and suppliers
Advantages of NYP type inner ring high viscosity pump (1) The conveying liquid is stable, without pulsation, low vibration and low noise. (2) It has strong self-priming performance. (3) The correct selection of parts materials can transport a variety of corrosive media, and the use temperature can be 200 ℃. (4) The rotation of the inner and outer rotors is the same, the wear is small, and the service life is long. (5)The speed and flow of NYP gear pump have a linear function relationship, and the flow of the pump can be changed by appropriately changing the rotation. (6) It is especially suitable for the transportation of high-viscosity and consistency medium.
product advantages: (1) The pump is mainly composed of inner and outer rotors, shafts, pump bodies, pump covers, brackets, seals, bearings, etc. (2) The conveying liquid is stable, without pulsation, low vibration and low noise. The speed of the pump and the flow rate are linear functions, and the speed of the pump can be changed appropriately to change the flow rate of the pump. is especially suitable for the transportation of high-viscosity media. The shaft end adopts mechanical seal.
Inspection work and maintenance methods of magnetic drive pump before start-up:
(2) First unscrew the water diversion screw plug of the magnetic pump body, and then fill the water diversion (or slurry).
(1) When adding bearing lubricating oil to the bearing body, observe that the oil level should be at the center line of the oil standard, and the lubricating oil should be replaced or replenished in time.
(3) Be sure to close the gate valve, outlet pressure gauge and inlet vacuum gauge of the outlet pipe.
(4) Jog the motor and try to see if the rotation direction of the motor is correct.
(5) When the motor is turned on and the magnetic pump is running normally, turn on the outlet pressure gauge and the inlet vacuum pump to see that it shows proper pressure, then gradually open the gate valve and check the motor load at the same time.
(6) Try to control the flow and head of the magnetic pump within the range indicated on the label to ensure that the magnetic pump runs at the highest efficiency point in order to obtain the greatest energy-saving effect.
(7) During the operation of the magnetic pump, the bearing temperature cannot exceed 35C, and the maximum temperature cannot exceed 80C.
(8) Regularly check the wear of the shaft sleeve, and replace it in time when the wear is large.
CQB. stainless steel heavy duty magnetic driving centrifugal pump in China, capacity range 2.0 to 120m3/h, head range 7.5 to 80m, power range 0.75 to 75kw, connection flange size range DN20 to DN100mm, 50Hz/60Hz, 380V/440V, three phase motor. Material, wet part(pump casing/cover/impeller) stainless steel, other parts material SIC, WC, PTFE and so on
The CQ (F) series pump is an electromagnetic coupling pump or magnetic drive pump, which is different from the traditional pumping method because the motor is connected to the pump by a magnetic method instead of a direct mechanical shaft. The pump works by driving magnets to “drive” the pump rotor, which is magnetically coupled with the main shaft driven by the motor.
CQ magnetic drive centrifugal pumps are usually used in places where there is a high risk of pumping fluid leakage (for example, corrosive fluids in the chemical or nuclear industry or electric shocks to garden fountains). They have no direct connection between the motor shaft and the impeller, so there is no need for a gland. Unless the casing is damaged, there is no risk of leakage.
Excellent corrosion resistance The main components of the CQ magnetic drive pump are made of high-corrosion-resistant materials, such as stainless steel, high-density carbon, high-purity aluminum ceramics and PVDF (polyvinylidene fluoride) or PP (polypropylene), combined with this material and non-leakage The sealless structure can ensure the safe delivery of most types of chemical liquids. Electromagnetic seal, less leakage and low operating noise.
High efficiency and energy saving design The highest pump efficiency reaches 50% to 55%, which is the highest level of resin pumps. When designing the pump, full consideration is given to energy saving.
Suitable for chemical liquid treatment CQ magnetic drive centrifugal pump is an ideal choice for harsh and harsh environments such as flammable, explosive, strongly corrosive and toxic. Compact design and optimized structure. The structure is simple and the components are minimal. In addition, the main components are modularly designed, which can be disassembled and inspected easily and quickly. Consumable parts can be replaced separately.
SAIKEN pump industry will tell you how to maintain centrifugal pump
If a high-quality product that is well-designed and manufactured and meets the requirements of on-site operating conditions, if it is not properly maintained, the frequency of failure during its entire life cycle will greatly increase, and the service life of components will be greatly reduced.
1. Common maintenance methods
There are three common maintenance methods for Multistage centrifugal pumps: reactive maintenance, preventive maintenance and predictive maintenance.
1.1 Reactive maintenance
The equipment has failed, and maintenance is carried out after the accident. Traditional maintenance methods are mostly reactive maintenance.
1.2 Preventive maintenance
Take appropriate measures (such as increasing strength, strengthening testing, etc.) to prevent equipment from malfunctioning. Preventive maintenance also includes a variety of regular maintenance, such as equipment alignment, bearing lubrication and inspection of instrumentation and control instruments.
1.3 Predictive maintenance
Predictive maintenance refers to the use of data, machine learning techniques and statistical algorithms to predict the most likely failure results of the system. Analyze the equipment data collected by monitoring devices, such as sensors (wired or wireless), in order to provide consistent predictions on when the specified parts should be replaced or maintained, thereby optimizing maintenance costs and downtime.
Predictive maintenance is a branch of state-based maintenance that monitors the state of equipment over time to predict when and where problems may occur and why. Maintaining products before they fail or stop unexpectedly is the ultimate goal pursued by the manufacturing industry.
2. Determination of maintenance methods
The maintenance methods of pumps used in different industries and working conditions are different.
The maintenance method is mainly determined by factors such as the importance and value of the pump (in the system), user or market requirements. The importance of the pump is usually divided according to the following conditions.
2.1 Important pumps
Usually refers to:
1) If the pump fails, it will cause catastrophic consequences to the equipment, system, and environment or cause major property losses. 2) The consequences of the malfunction are very dangerous and may cause serious irreversible injury or even death. 3) There is no backup pump.
2.2 More important pumps
1) If the pump fails, it may cause certain economic losses, such as shutdown of the production line, damage to some parts of the pump (and/or a long delivery period of spare parts).
2) Unattended or inconvenient on-site supervision (such as pumps for offshore platforms, field oil pumping stations, etc.).
2.3 Non-essential pumps
Pumps used in some unimportant working conditions, such as ordinary agricultural pumps.
For important and more important pumps or pumps (and systems) with special requirements, usually focused attention and special maintenance are required; for non-important pumps, usually only relatively simple maintenance or even no maintenance is required.
The following will discuss important and more important pumps or pump (and system) maintenance methods with special requirements.
3. Current status of maintenance methods
3.1 Current domestic situation
At present, there are basically two maintenance methods for centrifugal pumps in my country: reactive maintenance and preventive maintenance. Reactive maintenance is mainly for some ordinary non-important pumps without monitoring devices, such as: ordinary farmland irrigation and drainage pumps, cooling circulating water pumps, etc.
In the actual engineering application of the petrochemical industry, for many important pumps (such as high temperature, high pressure, high speed pumps, the implementation of API 610 standard [2], hereinafter referred to as “standard”), usually by improving the strength and reliability, increasing the mechanical protection system , Strengthen the way of regular daily maintenance to achieve preventive maintenance. Specific measures such as:
1) Improve strength and reliability
Standard clause 6.3.3 The pressure pump casing shall be designed as:
a) Under the worst combination of the maximum allowable working pressure (and the maximum working temperature) and the action listed in Table 5 on each orifice twice the allowable orifice load, it can be operated without leakage or rotating parts There is no contact between stationary parts.
b) Can withstand the water pressure test.
Standard Appendix K.1: Provides the judgment principle of the shaft rigidity of OH2 and OH3 cantilever pumps and the relationship diagram between the flexibility coefficient L3/D4 and the pump size factor.
The flexibility coefficient is a measure of the stiffness of the rotor. For a cantilever pump with a certain size factor, if its flexibility coefficient is below the rigid line, it indicates that the pump is designed with a rigid shaft, which meets the requirements of API pumps and is safe; the smaller the L3/D4, the smaller the rotor deflection. Conducive to improving the reliability of mechanical seals. If L3/D4 is too large, especially when the pump is running close to the dead center position and the hydraulic radial load is too large, it may cause the risk of shaft breakage.
How to improve the reliability of the product? Here are some guiding principles [3]: Try to use proven and mature technologies. Simplify the structure as much as possible and reduce the number of parts. Use standardized and modular structure as much as possible. Set up fault monitoring and diagnosis devices. Give an appropriate design margin. Use redundant design when necessary. Fail safe design. Strengthen the reliability analysis of important parts. Carry out reliability confirmation tests.
2) Mechanical protection system
With the development of sensor technology and the collection of equipment operation data, preventive maintenance has become the most common maintenance method at present.
In order to improve operational reliability, some important pumps (groups) are equipped with mechanical protection systems (sensing, measuring, monitoring and displaying machine parameters to indicate their operating status), such as bearing temperature monitoring, bearing housing or pump shaft Vibration monitoring, etc. When a parameter exceeds a predefined limit, indicating an abnormal situation, the system will communicate the event to the operator and/or shut down the system. The goal of the system is to reduce damage to the machine.
Vacuum vertical pump for wastewater filtration 1. the injection molding of FRPP / PVDF plastic material can be used for most chemical liquids and acid – base; 2. suitable for various acid and alkali liquid circulation, cooling, spray washing equipment, waste gas tower, etching machine, electroless plating, no electrolytic nickel and other special occasions
Fluorine-lined plastic magnetic drive pumps have found a stable and accepted position in the pump market. They are not omnipotent. They generally transport highly corrosive media with a temperature below 210°C. They are important problem solvers.
Fluorine-lined magnetic drive pump: Is it a product that is restricted in terms of lining material, performance and size?-It can be heard repeatedly that the pump industry is a “mature” industry, which usually means that you can’t expect bigger Leap development. In fact, the pump is one of the oldest machines in industrial history. There is still room for progress and innovation, which are mainly to improve the reliability and service life of the machine.
First of all, improvements were made in production, materials, hydraulics and design details of the bearing system, as well as the guidance and sealing of rotating parts. A major advancement is the introduction of sealless designs (magnetic drive pumps and canned motor pumps).
The double isolation cover system between the inner and outer magnetic cylinders ensures the non-leakage of the medium. The fluoroplastic inner isolation cover has strong corrosion resistance, and the outer isolation cover made of carbon fiber composite material bears a certain pressure load. This principle has the following main advantages:
The isolation cover system does not absorb any additional bearing force, it only realizes the function of a pressure vessel with a high safety margin.
The isolation cover system is not fragile and not easy to break (comparable to ceramic design).
The isolation cover has double safety, because the outer carbon fiber isolation cover material is also very resistant to corrosion.
Usually the eddy currents in the metal isolation cover will cause energy loss, but it will not exist here; and it can also prevent heat from entering the medium.
The eddy current problem is usually a key criterion for the use of plastic pumps, because the power consumption of eddy currents may account for more than one-tenth of the power of metal magnetic pumps.
Plastic magnetic pump manufacturers and suppliers
The magnetic drive sealless pump is ideal for low capacity with high head or high capacity with low head applications. It is widely applied in various industrial process. Such as PCB process, chemical industry, circulated filtering, etching, plating, surface treatment, polluted water treatment, etc. these pumps assure outstanding performance and maximum durability.
The chemical magnetic pump is digested, absorbed, digested and absorbed according to the relevant technical documents of various countries in the world. The chemical SUS magnetic pump has the advantages of high efficiency, long life, and strong natural suction skills. There is no need for pipelines, and the water pump bottom valve is installed. There are many reasons for the noise caused by the magnetic pump: 1. The noise caused by the destruction of the needle roller bearing is not easy to display if it is installed in the room-but the water sprayed more and more invaded the needle roller bearing In the future, the same room will damage the needle rollers, bearings, 2. The unbalanced noise of the suction filter pump will cause the fluctuation of the load of the motor bearing under the condition of the high-speed operation of the motor. Phase, concentricity results in noise, 3. Pump motor noise caused by improper installation. In terms of pump motor operation, the motor always has a certain noise and is accompanied by shaking. Co-shock will increase the shaking, and the pipelines seem to be one by one.
Working principle of stainless steel magnetic pump The drive device adopts an active magnet coupling to be directly mounted on the motor shaft. After the pump chamber is completed, the impeller with a magnet on the pump shaft is indirectly driven to rotate through magnetic coupling. The structure is compact, safe and energy-saving. The sturdy and durable pump body structure, the liquid contact part is made of stainless steel, so the pump body can bear the weight of the pipeline and withstand mechanical impact.
It usually consists of a motor, a magnetic coupling and a stainless steel pump head. The main feature of the SUS magnetic pump is the use of a magnetic coupling to transmit power without leakage. When the motor drives the outer magnet of the magnetic coupling to rotate, the magnetic lines of force pass through the gap and the isolation sleeve and act on the inner magnet to synchronize the pump rotor with the motor. Rotate, transfer torque without mechanical contact. At the power input end of the pump shaft, since the liquid is enclosed in a stationary isolating sleeve, there is no dynamic seal and therefore no leakage. The flow part of the CQB stainless steel magnetic pump is made of all stainless steel, which has good corrosion resistance to organic acids, organics, alkalis, neutral solutions and various gases. The double spiral groove carbon graphite bearings and cemented carbide bushings run-in , It has strong wear resistance and prolongs the life of the product. It is an ideal pump for transporting corrosive media without leakage.
The stainless steel magnetic pump uses static seals instead of dynamic seals, and uses magnetic coupling to drive indirectly, eliminating the trouble of dripping and leaking, and never pollutes the site. It is an ideal pump to prevent running, spilling, dripping, leakage and pollution in the chemical process, creating a “leak-free workshop” and a “leak-free factory” to realize safe and civilized production.
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