Non-negative Pressure Water Supply Systerm in a Building

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Shanghai
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TT OR LC
Min Order Qty:
1 unit
Supply Capability:
100 unit/month

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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)

  • Model Number: GDL
  • Theory: Centrifugal Pump

  • Structure: Multistage Pump

  • Usage: Water

  • Power: Electric

  • Standard or Nonstandard: Standard

  • Fuel: electric

  • Pressure: High Pressure

  • Application: water

  • Material: Stainless Steel

  • Color: Any

  • Size: 50~300mm

  • Package: Plywood Case

Packaging & Delivery

Packaging Details:standard plywood or carton for each non-negative pressure water supply systerm
Delivery Detail:10 days after receiving pre-payment

Specifications

water supply systerm in a building 
1. Removable, Portable, transportable 
2. Convienient 
3. Controlled Flow and Head

Non-negative Pressure Water supply systerm
Summarize

water supply systerm in a building  is our new design, which is used for building water supply,  fire fighting, flood, water supply station and so on. The systerm is controlled by Variable-frequency Drive, VFD.

Once you have this pump systerm, you do not need pump station any more, especial using in Prairie, Desert, city water supply, if the water source changed, you only move the pump container will be ok.

 

Main Features

1.1. Automatic control of constant water pressure

2.2. Set the pressure directly in the operator.

3.3. Built-in pressure or flow sensors, water level switch signal interface.

4.4. P.I.D control unmanned automatic monitoring of water pumps stoped function (dormant).

5.5. No need to configure the PLC can realize automatic alternating pump function.

6.6. Power outages or low water level automatically actived after the restore operation.

7.7. Controlle by thermostat.

8.8. Many pump-linked run-time, regular rotation as the master pump,so that the pump balanced working hours to prevent the pump speed of die wear and rust.

9.9. Adequate operation status monitoring, and complete motor protection features, simple operation.

10.10. To adapt to a variety of sensor signals:Pressure sensors, transmissible pressure gauge, eletric contact pressure gauges and pressure switches.

 

Full-automatic Control (Easy and Safe Controlling)

1. Solenoid Valve: Pressure backflow protection

2. Flow Sensor

3.Vacuum Pressure Sensor: Can know the inlet pressure,  once the valves all colosed,  will start reflux.

4. Flow Switch: if no water pass, the pump will stop working

 

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Q:Difference between primary hot water pump and two hot water pump
A hot water pump is a water pump circulating between the boiler and the heat exchanger, and the two hot water pump is a circulating water pump between the heat exchanger and the user. That is, there is no relationship between a water pump and heating users.
Q:Why should the water inlet of water pump be fitted with reducer?
Increasing the pipe diameter can reduce the resistance loss along the path and reduce the suction vacuum of the pump! Before the inlet of the pump is a big diameter, when you reach the suction port, and the pump inlet diameter to be consistent, so the use of reducer joints!
Q:22KW pump motor direct start circuit breaker and contactor size? Concrete calculation method
Strictly speaking, eleven kilowatts or more is not allowed to start directly
Q:Relationship between power and flow of sewage pump
There is a formula for motor power = flow (m3/h) * lift head (meter), *9.81/3600/ efficiency (general sewage pump efficiency is about 55%), *1.2 (motor safety factor)For example, 10 tons of flow, lift 10 meters, how much power?N=10*10*9.81/3600/0.55*1.2=0.595. so the motor power we chose should be 0.75KW
Q:What is the reason for the overload of the water pump indicator?
In this case, first check the frequency of the pump in the acceleration and deceleration time, to see how many seconds, 7.5KW10 seconds or so, 11KW 10 to 15 seconds, to see whether the peak water supply, low voltage and so on! Hope to be of some help to you!
Q:Water pump motor overload
If the power line is too long or too small, power line is too long or too small will cause excessive current. Valve shut down certainly affect the flow. When the valve is in the semi open state, the water pump out of the water flow down, the power to reduce, so the current drops.
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:When using a frequency converter to adjust the pump, what is the relationship between the change of the speed and the efficiency of the pump?
When you buy the pump, you can ask the manufacturer to give you an FM curve so that you can see the change in the efficiency of the pump as the frequency is adjustedSend you a document in the hope that I can help you
Q:90kw pump star delta start, in the end to use the circuit breaker, AC contactor (Star contactor, angle contactor), what kind of thermal relay?
Imports, such as Schneider, press: plastic case press 250A, contactor select 115 of 2, 95 of 1 can.Domestic recommendations: Press: plastic case press 250A, contactor 160, 2, 115 of the 1 can.
Q:37KW how many contactors does the pump need to start directly?
First of all, you have to see what voltage you use If 380V then current per KW is about 2A, if it is 660V per KW at about 1.1A, then it is the starting current is 3 to 7 times for the starting current, but for the moment, 380V voltage: 37*2=74A 100A on the line, 660V voltage: 37*1.1=40.7A 63A on the line.

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