Countermeasures to prevent fire pump cavitation

The pressure jockey pump is a kind of fire pump. It is used to stabilize the pressure of the automatic sprinkler system and the fire hydrant water supply system, so that the water pressure of the system is always in the required pressure state. Water volume and water pressure.

The fire pump should be installed firmly, and its firmness should be checked regularly, especially the anchor bolts or backrest bolts, to prevent the fasteners from loosening;

Strengthen monitoring by monitoring the vibration waveform of the pump during operation, regularly check and repair the wear between the impeller and the sealing ring, and discover and eliminate hidden dangers in time; when the vibration of the pump is found to be abnormal after starting, it should be decisively analyzed for cavitation phenomenon, whether the impeller is balanced, whether the pump shaft and the motor shaft are concentric or whether the shaft has been deformed, and then take corresponding measures.

A small leakage of the centrifugal fire pump will generally not cause an accident, but it will affect the supply efficiency of fire fighting water or foam. Therefore, the fire pump with packing seal should be used to strengthen the inspection of sealing packing;

If it is found that the seal is not tight, the packing should be replaced in time to prevent the fire pump from leaking during operation and affecting its performance.

CDL jockey pump with 50gpm capacity
This pump is 50gpm capacity with 100m pressure

The pressure stabilizer pump is a kind of fire pump. It is used to stabilize the pressure of the automatic sprinkler system and the fire hydrant water supply system, so that the water pressure of the system is always in the required pressure state. Once the sprinkler or fire hydrant comes out, it can flow out to meet the needs of fire fighting water volume and water pressure.

1, Vertical fire pump, multi-stage sectional structure. The pump inlet and outlet flanges are in the same straight line, the impeller is hydrodynamically balanced, axial force, a guide bearing at the lower end of the pump. The shaft is fixed to the motor shaft by means of a clamping coupling. The outer cylinder is a stainless steel cylinder.

　　2, The shaft seal is mechanically sealed.

　　3, The pump is driven by the motor and rotates in a clockwise direction when viewed from the motor end.

　　4, The pump outlet is equipped with an exhaust valve (air nozzle), which can ensure that the gas in the pump can be completely exhausted.

　　5, The impeller can be made of bronze. Avoid rusting between the impeller and the guide vane after long-term shutdown.

Starting with a cargo can beget damage to the motor, the factual use of head is too much lower than the pump nameplate head; submersible pumps without water work for too long.
First, first figure out whether the motor burn is burned comportments( mechanical failure) or burned coil( electrical failure).

still, substantially due toover-current, occasionally the voltage is too high or too low will also beget the coil to heat short circuit, If it’s the fault of burning the coil.

The pressure jockey pump is a kind of fire pump. It is used to stabilize the pressure of the automatic sprinkler system and the fire hydrant water supply system, so that the water pressure of the system is always in the required pressure state. Water volume and water pressure.

answer:
1. Loss of rotation accuracy
2. Large rotation resistance
3. There is noise during operation.

Maintaining a vertical turbine pump is crucial to ensure its optimal performance, efficiency, and longevity. Vertical turbine pumps are commonly used in various applications, including water supply, irrigation, and firefighting. Here are the key steps for maintaining a vertical turbine pump:

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1. The weight of the pipeline should not be borne on the pump, otherwise the pump will be easily damaged.

　　2. The pump and motor are of integral structure. The pump and the motor are an integral structure. It is calibrated by the manufacturer at the time of shipment, so there is no need to adjust the contract when installing it. This makes installation very easy.

　　3. The foot bolt must be tightened during installation. The pump should be inspected at regular intervals to prevent it from loosening. To prevent the pump from vibrating violently when starting up and affecting the performance of the pump.

　　4. Before installing the pump, check carefully whether there are any hard objects (such as stones, iron sand, etc.) in the flow channel of the pump that may affect the operation of the pump, so as to avoid damaging the overflow parts when the pump is in operation.

　　5. For easy maintenance and safety in use. Install a regulating valve on the pump’s throttle and a pressure gauge near the pump’s throttle, and for high head pumps. To prevent water hammer. A check valve should also be installed in front of the outlet gate valve to cope with sudden power failure and other loss of power accidents, thus ensuring that the pump operates under suitable working conditions and increasing the service life of the pump.

　　6. The pump is used in suction range situations. It should be equipped with a bottom valve, and the pipeline should not have too many bends in the mouth of the flume, and there should be no water leakage or air leakage in the same inch. To avoid affecting the suction performance of the pump.

　　7, in order not to make impurities burst into the pump and block the flow channel to affect the performance. A filter should be installed in front of the pump’s flume.

　　8, the installation of pipeline bary for the rotation of the pump rotor parts, should be no grinding sound or jamming phenomenon, otherwise the pump should be disassembled to check the reasons.

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2.5 L/S 80 M jockey pump after painting can arrange loading

Correctly select the supporting motor that matches the performance parameters of the pump to prevent the motor from being too small and overloaded for a long time; before starting the pump, check whether the outlet valve is fully closed to prevent the motor from being burned due to excessive starting current; The technical parameters of the motor require maintenance, check the power supply voltage and the current of each phase, and ensure that the error is within the allowable range.

Control press suitable for the main part of control and examination, a variety of small communities, estates and other fire fighting water force systems, artificial or civil structures, libraries, oil painting lading and unloading outstations, logistics premises , hospitals, seminaries, Shi type square and other public installations of colorful fire pipings, sprinkler fire main pump, fire supporter stabilized water force outfit and other fire fighting water force systems.

The control press substantially controls the controlled control press to execute the destined action, transmits the signal between the fire control relation regulator, and indicates the working status and fault status of the power force, control control press and controlled control press.

CDL Jockey pump test
We manufacture in strict accordance with customer requirements. All products will be tested before leaving the factory to ensure that there are no problems. The design meets the national standard of general packaging, meets customer needs, and standard handling and transportation.

Centrifugal fire pumps need to be manually filled with liquid before starting to clear the air accumulated in the pump casing. When filling the pump, ensure that the bottom valve of the suction line is well closed; For fire pumps, it is necessary to ensure that the automatic filling pump system works normally; regularly check the tightness of the suction pipeline to prevent the air from being sucked in due to poor sealing, and to avoid air binding during the operation of the pump and affect the work.

The booster pump has the advantages of simple maintenance, high cost performance, strong adjustability, adjustable driving air pressure, excellent material, large output flow, small footprint, light weight, low noise, excellent performance and reliable operation.

1, The fire pump in the installation, the pump bolt slack leakage
Treatment: adjust the front position of the fire pump, slowly tighten the screws of the outer ring of the pump body one by one, do not tighten one screw at a time
2、The sealing surface is not flat, the liquid in the pump will flow out to the pump along the place where the seal is not tight
Treatment: provide vertical multi-stage fire pump model parameters to replace the mechanical seal
3, Mechanical seal amplitude hair wear serious, seepage and water leakage occurred
Treatment: adjust the friction position of the seal ring, take out the seal ring, and then exchange the orientation equipment, such as the seal ring on the fastening spring loss of elasticity or cracking, can remove the spring, with the appropriate diameter of steel wire or wire tied
4、The fire pump body has sand holes or rupture
Treatment: Replace the pump body of the fire pump

Control and adjust the installation height of the pump so that the installation height between the suction port of the pump and the liquid surface does not exceed the maximum allowable installation height, especially for mobile fire pumps, if they cannot absorb and discharge liquid normally, the installation height may be inappropriate. It can be solved by reducing the installation height or reverse installation;

Or add a small-capacity storage tank in front of the pump to increase the height of the liquid level and increase the static pressure, thereby shortening the distance between the liquid level of the suction storage tank and the suction port of the pump to prevent cavitation;

It can also prevent cavitation by reducing the flow resistance loss on the pump suction line. Shorten the length of the suction pipeline as far as possible within the allowable range, reduce the number of pipe fittings such as elbows and valves, and appropriately increase the diameter of the suction pipeline;

By improving the strength and abrasion resistance of the pump material, it can also effectively reduce the erosion of the pump caused by cavitation, so as to reduce the damage caused by cavitation to the pump and prolong its service life. In the selection of the impeller, it is possible to choose high hardness and high elasticity materials with strong cavitation resistance.

The pump’s performance range: flow 130~9000m³/h, head 3.5~22m. Simple structure, reliable use, easy installation, high efficiency, small body, light weight. Direct and variable actuations. The common movers are motor and diesel engine. Please note the model (power, rotating speed) of the mover so as to make sure of the norms of the clutch or the belt pulley. Viewing from the pump inlet, the impeller rotates counterclockwise generally (clockwise with 650HW-5, -7, -10 pump).

The jockey pump is a kind of fire pump. It is used to stabilize the pressure of the automatic sprinkler system and the fire hydrant water supply system, so that the water pressure of the system is always in the required pressure state. Water volume and water pressure.

A pipeline pump refers to a water pump that can be directly installed on a water pipeline, and can also be called a pipeline centrifugal pump. More space-saving compared to ground-mounted pumps. This pump is mainly used for industrial water transportation and urban water system. Model, different pump body materials can be selected in different transportation environments, and it is a very popular transportation equipment at present.

1, The pump packing pressure is too tight or too loose leakage
Treatment: adjust the tightness of the gland
2, multi-stage water seal ring position offset leakage
Treatment: adjust the position of the water seal ring so that the water seal ring is exactly aligned with the water seal pipe mouth.
3、The fire pump packing wears too much or the sleeve wears out and leaks water
Treatment: Replace the packing or shaft sleeve

1、Inspection function: the equipment can automatically or manually inspect the fire pump at regular intervals according to the cycle you set.

3、Protection and alarm function: when the fire fighting system has a motor power failure, over-current, short-circuit, etc., the inspection cabinet will automatically issue alarm and protection function, and issue sound and light alarm signal.

4, remote monitoring and control function: inspection cabinet can communicate with the fire control centre through the bus, to achieve the purpose of monitoring the operation of the system in the fire control centre.

5、Water test function with pressure: the inspection cabinet can carry out water test with pressure on the pipeline system according to the configuration of the fire protection pipeline.

6, mobile phone SMS alarm function: Shanghai Xizhiquan inspection cabinet can be configured according to the needs of users, choose to configure mobile phone alarm.

The explosion-proof pump is an explosion-proof centrifugal pump, which has the characteristics of simple structure, convenient operation and maintenance, stable operation, large displacement, high efficiency, easy adjustment, and wide application range.

1, impeller inflow channel blockage
First of all, the most intuitive problem, check whether the impeller is stuck in the main blockage, if so, timely cleaning can break theproblem.However, filtering bias can be added to the front of the pump bay to avoid the impeller runners being blocked again, If necessary.
2 、 Inside leakage
When the gap between the connection points of colorful corridor in the pump is too large, it’ll beget the pump to blunder, performing in a drop in discharge pressure. When this problem occurs, dismembering and form should be carried out.
3 、 Cavitation
still, performing in the pump bay pressure is lower than the impregnated brume pressure of the pumping medium, it’ll form cavitation, If the bay pipeline system has no blockage or the bay stopcock opening is too small. At this time, the blockage should be cleared or the bay stopcock should be opened wide, or the liquid position of the bay pool should be increased.
4 、 drop in rotational speed
Check whether the speed of the pump is reduced because of certain factors, the speed is commensurable to the head, if the speed of the problem, check the reasons, reasonable results.
5 、 Motor reversal
Observe the steering of the pump, if the steering is reversed, exchange the two cables on the outstations of the motor.

There are many classification methods for fire pumps, which can be divided into sprinkler pumps, fire hydrant pumps, jockey pumps, etc. according to their uses.
jockey pump: The flow rate of the stabilizer pump is small. Usually, water is taken from the fire pool or high-level fire water tank and sent to the system to maintain the pressure in the system pipeline. When a fire occurs, the flow rate used to start the system is provided until the main fire pump is started. , the jockey pump needs to be set up as a backup pump.

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Client order us two set electric pump and two set jockey pump and one 1000L air tank