Jining Jiuzhong Machinery Equipment Co., Ltd.

*Multi-stage vertical centrifugal pump
D-type vertical pipeline centrifugal multi-stage pump is widely used in the circulation and boosting of hot and cold water in high-pressure operation systems, and multiple pumps in high-rise buildings
Parallel water supply, fire protection, boiler water supply and cooling water systems and transportation of various flushing fluids, etc.
Product use of D vertical multi-stage centrifugal pump:
, used to transport clean water or liquids with physical and chemical properties similar to clean water
, there should be no solid particles, no fiber, and no strong corrosiveness in the transported liquid. No explosion hazard
, the maximum liquid temperature does not exceed ℃
, the maximum working pressure does not exceed.
, the power supply is for phase. The voltage fluctuation should be within %
, and the ambient temperature should be lower than ℃ and the relative humidity should be lower than %.
D multi-stage centrifugal pump product features:
Advanced hydraulic model: high efficiency, wide range.
Convenient installation and maintenance: pipeline installation, the inlet and outlet can be installed at any position and in any direction of the pipeline like a valve, which is extremely convenient for installation and maintenance.
Beautiful appearance: Made of high-quality stainless steel jacket with beautiful appearance.
, D. Less operation and maintenance costs: Using high-quality mechanical seals with wear resistance, no leakage, long service life, low failure rate and less operation and maintenance costs.
, D unique components, reducing noise: unique hydraulic components designed with good flow performance to minimize flow noise.
, D vertical structure occupies a small area.
Model Series Speed Efficiency Flow Lift Power Weight
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D vertical multi-stage centrifugal pump usage conditions:
, used to transport clean water or liquids with physical and chemical properties similar to clean water
, there should be no solid particles, no fiber, no Strongly corrosive and no explosion hazard
, the maximum liquid temperature does not exceed ℃
, the maximum working pressure does not exceed.
, the power supply is for phase. The voltage fluctuation should be within %
, and the ambient temperature should be lower than ℃ and the relative humidity should be lower than %.
D-type centrifugal pump installation instructions:
, The weight of the pipeline should not be borne on the D-type vertical centrifugal pump during installation, otherwise the ring will be easily damaged D-type vertical centrifugal pump
, Multi-stage centrifugal pump The overall structure of the pump motor has been calibrated by the manufacturer before leaving the factory, so there is no need to adjust during installation, so it is very convenient to install. Before installing the water pump, you should carefully check whether there are any hard objects in the flow channel of the D multi-stage pump that may affect the operation of the water pump (such as Stones, iron sand, etc.) to avoid damaging the flow-passing parts during operation of the water pump
The anchor bolts must be tightened during installation and the pump should be inspected at intervals to prevent it from loosening to avoid severe vibration when the water pump is started. In order to facilitate maintenance and safe use, a regulating valve should be installed on the inlet and outlet pipelines of the pump and a pressure gauge should be installed near the inlet and outlet of the pump. For high lifts, in order to prevent water hammer, a regulating valve should be installed in front of the outlet gate valve. Install a check valve to cope with sudden power outage and other power loss accidents to ensure that the water pump operates under optimal working conditions and increase the service life of the water pump
. Multi-stage centrifugal pumps should be equipped with a bottom valve when used in situations with a suction lift. And the inlet pipeline should not have too many bends and should not have water or air leakage to avoid affecting the suction performance of the water pump
. In order to prevent impurities from entering the pump and blocking the flow path and affecting performance, a filter should be installed in front of the pump inlet. Before installing the pipe, there should be no friction sound or jamming when rotating the rotor part of the water pump. Otherwise, the pump should be disassembled to check the cause.
Starting and stopping D multi-stage centrifugal pump: preparation before starting
, pull and rotate the coupling impeller by hand, there should be no jamming phenomenon, and the impeller can rotate flexibly
, open the inlet valve, open the exhaust valve to let the liquid Fill the entire pump cavity and then close the exhaust nozzle
. If hot liquid is transported, it should be preheated before starting. The temperature rise rate is ℃/pump preheating is achieved by continuously circulating the transported liquid so that all parts are heated evenly
/> , you should first turn the pump by hand for several turns to let the lubricating water enter the end face of the mechanical seal
, and jog the motor to check whether the direction is correct.
Starting and running
, fully open the inlet valve and close the discharge pipe door
, turn on the power, when the multi-stage pump reaches normal speed, gradually open the valve on the discharge pipe and adjust it to the required working speed. Condition
Pay attention to the instrument readings, check the shaft seal leakage, the normal timing of the mechanical seal leakage, check the temperature of the motor and bearings, and deal with it in time if any abnormality is found.
Stop
, gradually close the discharge pipe valve
, close the inlet valve
, if the ambient temperature is lower than ℃. The liquid in the pump should be drained to avoid freezing and cracking the water pump
. If it is not used for a long time, the pump should be disassembled, cleaned, packaged and stored.
Maintenance and maintenance of D multi-stage vertical centrifugal pump:
Maintenance and maintenance during operation
The water inlet pipeline must be highly sealed and cannot leak water or air
Multi-stage centrifugation is prohibited The pump runs for a long time under cavitation conditions
. It is prohibited to run the motor over current for a long time when the multi-stage centrifugal pump is running under large flow conditions
. Regularly check the motor current value of the multi-stage centrifugal pump during operation and try to keep the pump Operate within the designed working conditions
. Multi-stage centrifugal pumps should be supervised by dedicated personnel during operation to avoid accidents
. Multi-stage centrifugal pumps should refuel the bearings every operating hour
. Multi-stage centrifugal pumps. After the pump has been running for a long time, the noise and vibration of the unit will increase due to mechanical wear and tear. The unit should be stopped for inspection and necessary replacement of wearing parts and bearings. The overhaul period of the unit is generally one year.
D vertical multi-stage centrifugal pump is a new generation product designed and manufactured by our company on the basis of excellent foreign pump models, combined with user requirements and fire protection standards
and in accordance with - standards. The suction and discharge ports of the water pump are located on the same straight line. The rotor component consists of a shaft, impeller, impeller sleeve, bushing and other parts. The water inlet section, the middle section and the water outlet section are connected by tightening bolts. The shaft seal adopts mechanical seal and is lubricated and cooled by pressure water in the balance chamber. It is the best pump type for transporting hot and cold water or liquids with physical and chemical properties similar to water in various major industries.
Factory address: Liying Industrial Park, Rencheng District, Jining, Shandong
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