Single-stage Marine Fire Fighting Pumps Unit

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Loading Port:
China main port
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TT OR LC
Min Order Qty:
1 unit
Supply Capability:
1000 unit/month

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Product Description:

Application

Apply as the transportation of liquids in the fields of air condition, heating, sanitary water, water treatment cooling, refrigerating system, liquid circulation, water supply, pressure boosting,sea water delivery and irrigation etc.

 

Working Conditions

Rotating speed: 3600r/min, 1800r/min, 2960r/min, 1480r/min

Medium: clean water or other liquids similar to clean water in physical and chemical properties

Medium temperature: -10 ~ 80°C,400°C available under special design

Ambient temperature: Up to 40°C

Range of capacity:1.8~2000m3/h

Range of head: up to230m

Maximum working pressure: suction pressure+head of pump≤25 bar

 

Pump Construction

Casing/impeller:cast iron,stainless steel,copper,bronze

Shaft:carbon steel 45#,stainless steel

Mechnical seal:graphite/silicon carbide/tungsten carbide 

 

Structure Description

Compact structure, most application for modern constructions.

1.Pump casing: the spiral casing with pipe connection is designed and manufactured by the most superior bydraulic model nowadays, with inlet and outlet the same diameter. Flanges conform to GB4216.5, and are equipped with Rp1/4 or Rp 3/8 pressure testing plug.

2.Impeller: closed impeller ,no limit to rotation direction under the water temperature below 80°C and 120°C.

3.Special design of dynamic seal ring ensure well seal and reliable operation..

 

Motor

TEFC air-cooled squirrel cage, 3 phase asynchronous motor.

Voltage: 220V,380V,400V,415V,440V,660V(other voltage ,pls inform before order)

Frequency: 50Hz,60Hz

Insulation : IP44/IP54/IP55

Protection class: B/F

Insulation modes: B35

 

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Q:When the pump is connected in parallel, will the head and flow change?
2 pumps parallel, lift the same, pump head is not stacked?;Answer: the head can not be superimposed, that is, a lift and a pump, but the pumping speed (flow) is two times a taiwan.2 pumps in series, the same flow, pump head is not stacked?.Answer: the head can be superimposed, that is, the pump head is two times as much as a pump, but the pump speed is the same as that of a pump.A pump is a machine that transports liquids or pumps liquids. It will be the prime mover of the mechanical energy or other external energy transfer to the liquid, the liquid energy increase, mainly used to transport liquids including water, oil, alkali liquid, emulsion, suspension emulsion and liquid metal, but also transport liquid, gas mixtures and liquids containing suspended solids. Pump performance of technical parameters are flow, suction, lift, shaft power, water power, efficiency, etc.; according to the different principles of work can be divided into volume pumps, vane pumps and other types. Displacement pump is to use its studio volume changes to transfer energy; vane pump is to use the rotating blade and water interaction to transfer energy, there are centrifugal pumps, axial flow pumps and mixed flow pumps and other types.
Q:Submersible pump reverse impact on the pump
Water pump is easy to burn out.Submersible pump is an important equipment for deep well water extraction. When in use, the whole unit dives into the water. The extraction of groundwater to the surface is water, mine rescue, industrial cooling, irrigation, water lifting, ship ballast, also can be used in fountain landscape, hot water submersible pump for hot spring bath, but also can be applied to the extraction of groundwater from wells, can also be used in rivers, reservoirs, canals and other water projects. Mainly used for irrigation and high mountain areas, drinking water, but also for the central air conditioning cooling, heat pump, cooling pump unit, city, factories, mines, railways, construction site drainage use. The general flow can be achieved (5m per hour, fand fand ~650m) head can reach 10-550 meters.There are several kinds of electric submersible pump, in line package is oil immersed and water invasion there is dry must first read the instructions before use, cannot be wrong, not long before use, must have to make the impeller turn, or because of long time card dead burning.Before the pump is opened, the suction pipe and pump must be filled with liquid. Open the pump, the impeller rotating speed, which leaves the liquid together with the rotation under the action of centrifugal force, the left outside impeller injection, injection of the liquid in the pump shell gradually slow the spread of indoor speed, the pressure gradually increased, and then from the pump outlet, the outflow discharge tube.At this time, in the leaves at the center of the vacuum area of low pressure liquid was thrown to the surrounding formation there is no air and no liquid, liquid pool at the surface of the liquid under the action of atmospheric pressure, through the suction pipe into the pump, the liquid is continuously pumped up from the liquid pool is also continuously from the outflow discharge tube.
Q:Relationship between power and flow of sewage pump
If you simply want a formula that satisfies your everyday application, the following will meet the requirement:N= y QH/1000,The severe gamma liquid, cattle - ETA / m3; efficiency; N- kW; H- head, power meters;Q- volume flow per cubic meter / second; divided by 1000 is the change of power W to kW;Attachment: gravity is the density of an object multiplied by gravity. Acceleration is expressed as a force in terms of the weight of a unit;The formula is applicable to situations where the calculation is not high and applicable to any liquid known or known to be heavy;The formula is reduced to three simplifications:1, ignoring the pump impeller, shaft and other friction losses;2, ignore the pump flow loss;3, ignore the pump pipe, as well as mechanical heat loss;As a result of the above three loss in the process, material, liquid delivery the same condition can be simplified as a coefficient, then adjust the ETA - efficiency coefficient, can satisfy the application value.The deduction principle of this formula is relatively simple, and the mechanical work of the pump is considered to be transferred to the mechanical energy of the liquid completely;That is, N= gamma QH, at this time, all the mechanical energy that water possesses;Electrical and mechanical energy conversion efficiency exists, then divided by the conversion efficiency ETA is obtained;N= y QH/1000;Special attention is needed. - though the efficiency represents the input electric energy and water energy ratio; but the relationship between the two have many effects, the structure of pump, pump body, liquid material feeding. If the above formula is used to estimate, it should be revised according to the actual situation.
Q:Why does the water pump in the tank pull out the power supply and then plug it in?
Unplug the power, pump into the water, exhaust air, and then connected to the power supply
Q:Domestic pump does not use water, or turn, I do not know why?
The motor should be kept working, may be the motor switch problem, idling motor pump long time will certainly be bad, ha ha, the solution is to find a water pump maintenance master to work safety first!
Q:Pump power ratio design is small, the problem is big?
Lift and flow to meet the requirements of power, in fact little difference, different manufacturers and brands in the same common effect of different power phenomenon, design principle is on the one hand, the hysteresis loss mechanical loss processing technology is one of the reasons of the differences. Power, after all, does not increase, and does not have a major impact on other lines.
Q:What's the difference between a double suction pump and a single suction pump?
The difference between a single suction pump and a double suction pump is that the double suction pump has two intake ports, while the single suction has only one intake.
Q:How to determine the pump installation elevation, why should we determine the pump installation elevation?
Determination of pump installation elevation: the geometric height between the suction well level and the center line of the pump impeller, plus the hydraulic loss of the suction pipe, is the actual installation height of the pump. (notice: if the suction level is higher than the center of the impeller, it should be negative)To determine the water pump installation elevation reasons: general water pump nameplate on the "NPSH" value, the above calculation of the value must be less than this NPSH value, so as to ensure that water pump is not prone to cavitation.[NPSH] - allowable cavitation margin is to determine the conditions of use of the pump cavitation margin.
Q:The efficiency of water pump frequency conversion is very low, why?
There is a running curve for the fan and water pump.Enough is enough
Q:How to measure the temperature of pump body?
It's the temperature of the pump motor!In addition to large pumps, water temperature is rarely monitored. Even so, the temperature of the pump body will not be measured.Since the water pump pumping, the leaves, vanes and shells are no temperature rise, the temperature is mainly concentrated in the bearing: small pumps rely on the work medium can play a role in reducing friction heat;Heating large pump mainly in the thrust bearing and guide bearing, if the bearing is lubricated by water cooling water, if there is oil lubricated oil cooling equipment specially, temperature monitoring of bearing large pumps can be installed in the pump thrust bearing temperature sensor to monitor the varnay.

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