First, the vertical stainless steel multi-stage centrifugal pump product overview: Second, the working conditions of vertical stainless steel multistage centrifugal pump: Motor: Eight, the use of vertical stainless steel multistage centrifugal pump: 1. The weight of the pipeline should not be carried on the pump during installation, otherwise the vulnerable ring water pump; 10. Precautions for the use of vertical stainless steel multistage centrifugal pumps: 1. The water inlet pipeline must be highly sealed and must not leak or leak air; M-Aminophenol,Sulfanilic Acid,Metanilic Acid Cas Polyurethane Catalyst,Rubber Auxiliary Co., Ltd. , http://www.wflonggang.com
Vertical stainless steel multistage centrifugal pump is a versatile product that can transport various media from tap water to industrial liquid, adapt to different temperature, flow and pressure ranges, suitable for non-corrosive liquids, vertical stainless steel multi-stage Centrifugal pumps are suitable for mildly corrosive liquids.
The main components of vertical stainless steel multistage centrifugal pumps such as impeller, deflector, pump shaft and outer cylinder are made of stainless steel. All the flow parts of QDL(N) series are made of stainless steel, with good corrosion resistance and hard Alloy bearing and mechanical seal, rigid coupling transmission, with small size, light weight, corrosion resistance, low vibration, low noise, small floor space, long service life, beautiful appearance, etc., especially high efficiency, energy saving, etc. .
A thin, clean, non-flammable, explosive material that does not contain solid particles or fibers.
Liquid temperature: normal temperature type -15 ° C to +70 ° C hot water type +70 ° C to 120 ° C
Maximum ambient temperature: +40 ° C
Altitude: up to 1000m
Third, the vertical stainless steel multi-stage centrifugal pump application range:
The common type is suitable for liquid transport, hot and cold cleaning water, softened water circulation and pressurization. Vertical stainless steel multistage centrifugal pumps are also suitable for use in slightly alkaline water, mineral water, distilled water, swimming pool water and other chloride-containing liquids, but the liquid temperature is required to be reduced.
Fourth, the vertical stainless steel multi-stage centrifugal pump typical application:
Water supply: water plant filtration and transportation, water plant district water supply, supercharged supercharged, high-rise building supercharged.
Industrial pressurization: process water system, cleaning system, high pressure flushing system, fire fighting system.
Industrial liquid transport: cooling and air conditioning systems, boiler feed water and condensing systems, machine tools, acids and bases.
Water Treatment: ultrafiltration system, reverse osmosis system, distillation system, separator, swimming pool.
Irrigation: irrigation, sprinkler irrigation, drip irrigation.
The motor is a fully enclosed, air-cooled two-pole standard motor.
Protection level: IP55
Insulation class: F
Minimum inlet pressure NPSH:
If the pressure of the QDLF vertical stainless steel multistage centrifugal pump is lower than the vapor pressure of the liquid to be transported, cavitation may occur. To avoid cavitation, ensure that there is a minimum pressure on the inlet side of the pump. The maximum suction path H[m] can be calculated as follows: H=Pb×10.2-NPSH-Hf-Hv-Hs
Where: Pb = atmospheric pressure [bar] (atmospheric pressure can be set to 1 bar), in closed system, Pb is system pressure [bar]. NPSH = net positive tip [m] (can be pumped from NPSH curve The maximum possible flow rate is read). Hf = line loss [m] of the inlet. Hv = steam pressure [m]. Hs = safety margin = minimum 0.5m head. If the calculated H is positive, the QDLF vertical stainless steel multistage centrifugal pump can be operated with maximum suction. If the calculated H is negative, there must be a head with a minimum inlet pressure H.
Parallel operation:
It may be more advantageous to replace multiple vertical pumps with multiple vertical stainless steel multistage centrifugal pumps. In variable flow systems, adapt to the required operating point of the system.
Increase the possibility of water supply, because the vertical stainless steel multistage centrifugal pump fails only affect part of the flow of the system.
Five, vertical stainless steel multi-stage centrifugal pump use conditions:
1, medium temperature: -15 ° C ~ +120 ° C. 2. Maximum ambient temperature: +40 °C. 3, the maximum environmental pressure: 10bar. 4. The maximum inlet pressure is limited by the maximum environmental pressure. 5. When the density or viscosity of the transport medium is greater than water, consider using a motor with a higher power. Fourth, the transport medium 1, thin, clean, non-flammable and explosive medium without solid particles or fibers. 2. Such as mineral water, softened water, pure water, clear oil and other light chemical media. 3. The main material of the vertical stainless steel multi-stage pump is stainless steel, which can be used to pump mild corrosive media. 5. The motor is selected as a fully enclosed, air-cooled two-pole standard motor protection class: IP55 Insulation class: F Standard voltage (50Hz): single-phase 220V, three-phase 220V/380V
1 municipal water supply and booster 2 industrial circulation system processing system 3 boiler feed water and cold heat coagulation system 4 household water supply 5 environmental water treatment, infiltration analysis system 6 agricultural irrigation and dehydration 7 industrial plant cleaning and various cleaning work 8 (other) many Special purpose
Nine, vertical stainless steel multi-stage centrifugal pump installation instructions:
2, the pump motor is the overall structure, has been calibrated by the factory at the factory, so no adjustment is required during installation, so it is very convenient to install;
3. Before installing the water pump, carefully check whether there are any hard materials in the pump flow channel that affect the operation of the pump (such as stones, iron sand, etc.) to avoid damage to the flow parts when the pump is running;
4. The anchor bolts must be tightened during installation, and the pump should be checked to prevent loosening during each interval, so as to avoid the impact of severe vibration when the pump starts.
5. For the convenience of maintenance and safety of use, install a regulating valve on the inlet and outlet of the pump and install a pressure gauge near the inlet and outlet of the pump. For high lift, in order to prevent water hammer, install a valve in front of the exit gate valve. Only return the valve to cope with the sudden power failure and other loss of power accidents, so as to ensure that the pump operates under the best working conditions, increasing the service life of the pump;
6. When the pump is used for suction, it should be equipped with a bottom valve, and the inlet pipeline should not have too many bends, and there should be no leakage or air leakage, so as not to affect the suction performance of the pump;
7. In order to block the flow path from affecting the performance without entering impurities into the pump, a filter should be installed in front of the pump inlet;
8. Rotate the rotor parts of the water pump before installing the pipeline. There should be no friction or jamming. Otherwise, the pump should be disassembled for inspection.
2. It is forbidden to operate the pump for a long time under cavitation;
3. It is forbidden for the pump to run for a long time when the pump is running under large flow conditions;
4. Regularly check the motor current value during pump operation, and try to make the pump run within the design working conditions;
5, vertical stainless steel multi-stage centrifugal pump should be supervised during operation to avoid accidents;
6. The vertical stainless steel multistage centrifugal pump should refuel the bearing every 500 hours of operation;
7. After long-term operation of vertical stainless steel multi-stage centrifugal pump, due to mechanical wear, the noise and vibration of the unit will increase. It should be stopped for inspection. It is necessary to replace the vulnerable parts and bearings. The overhaul period of the unit is generally one year.
Maintenance and maintenance of mechanical seals
8. The mechanical seal lubricating fluid should be clean and free of solid particles;
9. It is strictly forbidden to work in the case of dry grinding.
10. The vertical stainless steel multi-stage centrifugal pump should be driven a few times before the start of the pump (motor) to avoid the mechanical seal breakage damage caused by sudden start.