VG-3XTechnical Agreement for Comprehensive Testing System of Water Pump Performance

1. Installation location: Indoor

2. Altitude not exceeding 1000 meters

3. Environmental temperature -25 ℃~+40 ℃

4. Humidity not exceeding 95% (at+25 ℃)

5. Pollution level II

6. Equipment power supply: AC220V, 50HZ (system power supply) AC380V, 50HZ (main circuit power supply)

7. Application objects: cam rotor pumps with a power output of 0.55-55KW and a voltage below 380V/220V.

2、 The water pump test bench has the following parameters and requirements:

This system is a specialized system for water pump performance testing, suitable for various types of testing pumps; The system mainly consists of a main control cabinet, flow sensors, pressure sensors, instruments, etc. It can detect various data such as voltage, current, power, flow rate, speed, pressure, and head of the water pump motor; And it can draw H-Q curve, P-Q curve, η - Q curve, and (NPSH) r-Q curve based on the data collected from the testing project.

This system complies with: international standard ISO9906-2000/national standards GB3216-2005, GB12785-2002, GB6245-2006, GB9064, mechanical industry standards JB8092-96, JB5118-2001, JB8091-98, JB6434-92

The system includes a test bench equipment with a maximum test pressure of 2MPa for an open bench. The main cabinet of each station contains current and voltage display heads for the water pump, intelligent speed and flow testers, pressure and head testers, and three-phase electrical parameter testers.

nOpen platform:

The water circulation system in this station equipment is an open station, with a test power of:

0.55-55KW -40A, 100A main cabinets can control the entire equipment, with emergency stop buttons for the entire system, start/stop buttons for the main pump, power switching knobs, current switching knobs for corresponding power levels, flow switching knobs, pressure switching knobs, and control buttons for different electric valves. Each button also has corresponding indicator lights.

The electric valve control buttons are DN50/80/100/200 electric valve control buttons. This equipment includes a main cabinet, instruments, standard pipelines, and water tank valves.

Figure 1

1. Intelligent Speed and Flow Measurement Instrument (SFT-A):

Two windows display simultaneous measurement of motor speed and pump flow rate. Window 1 has a speed measurement display function, while Window 2, in conjunction with flow sensors equipped with frequency outputs such as turbines, electromagnetic flow, etc., measures flow frequency differences, liter/second flow rates, ton/hour flow rates, and converted rated speed flow rates.

Instrument measurement accuracy ± 0.1%

2. Intelligent Pressure Head Tester (P-H):

The instrument is equipped with a 4-20mA output pressure transformer, which can measure and display the pressure of both the inlet and outlet channels. The unit can be switched between Mpa, kPa, kgf, and M (meters of water column) for display.

Instrument measurement accuracy ± 0.1%

3. Three phase electrical parameter tester (GDW3001A):

Measurement range: voltage (500V), current (40A), power, power factor, frequency

Function: Three window conversion display, latch, communication, voltage current ratio setting

Instrument measurement accuracy ± 0.5%

1. Pump testing types: submersible pump testing, pump performance testing, pump turbidity testing, submersible pump testing, positive displacement pump testing, well submersible pump testing, positive displacement pump turbidity testing.

2. Testing method:

Measuring unit efficiency using electrical measurement method

Measurement of pump efficiency using the actual measurement method

Calculate efficiency from motor curve

3. Rich parameter setting functions:

1) Product design parameters: including design point flow rate, design point head, design point efficiency, large flow point flow rate, large flow point head, large flow point efficiency, small flow point flow rate, small flow point head, small flow point efficiency, ideal point flow rate, full pressure of positive displacement pump, rated speed, speed transmission ratio, and setting of steam turbidity margin parameters.

2) State parameter settings: including inlet pipe diameter, outlet pipe diameter, inlet gauge difference, outlet gauge difference, atmospheric pressure, room temperature, pump stage, and sampling frequency parameter settings.

3) Test method setting:

Selection of flow sensors: (electromagnetic flowmeter, eddy current flowmeter, orifice plate differential press), range, turbine coefficient, orifice plate coefficient.

Selection of pressure sensors: (positive and negative gauges for differential pressure gauges, differential pressure sensors, outlet pressure sensors, positive and negative gauges for outlet pressure gauges, positive and negative gauges for differential pressure gauges), inlet pressure range, outlet pressure range.

Power testing methods: (electrical measurement method, torque method), (single-phase motor, three-phase motor), current rate, motor curve, sensor calibration temperature.

Speed testing method: (automatic measurement, manual measurement)

4. Humanized testing interface: including key functions such as parameter screen display, stop, sampling, insertion sampling, resampling, deletion, calculation, data display, motor power calculation, and data processing.

5. Data processing interface: Basic information settings include manufacturing unit, report number, test time, pump model, pump number, room temperature, water temperature, atmospheric pressure, gauge difference, inlet pipe diameter, outlet pipe diameter, pressure range, current rate, rated power, rated speed, flowmeter coefficient, etc.

6. Error analysis function of the test bench: including average value, percentage error (%), random error (%), systematic error (%), and total error (%).

7. Enter the "Curve Fitting" function

Curve types: performance curve, turbidity curve, two curves.

Discrimination types: cross line discrimination, non discrimination, etc.

Level: (Level 1, Level 2, Custom, Level B, Level C).

Open the data and import the data to be fitted.

Open the data file and search by product number, product model, and testing date separately.

8. Perform curve fitting on the exported data and draw pump performance curves (H-Q, H-Q, P-Q) or cavitation curves (NASH-Q).

9. Print curve reports, accuracy analysis reports, and print English curves.

10. Draw current curves and compare graphs.

Provide a complete set of operating instructions and a software CD. The manual must explain how to use the equipment, how to set parameters, precautions for equipment operation, and safety terms. The software CD should provide a complete computer operating system, testing software, and testing data analysis software.

The supplier shall provide training to at least one maintenance personnel and one equipment operator from the demand side until they have fully mastered the relevant skills. The training period shall not be less than 3 working days. The specific time will be determined according to the arrangement of the demand side.

1. After the equipment is manufactured, the supplier shall notify the purchaser to conduct a pre acceptance inspection. After the pre acceptance inspection is qualified, the equipment shall be sent to the purchaser.

2. The supplier is responsible for the installation and commissioning of the equipment on the demand side; After the equipment debugging is completed, both parties shall conduct acceptance according to the content of the technical agreement; The equipment shall meet all the requirements specified in this agreement.

3. After the equipment and installation debugging pass the self acceptance and are delivered for normal use, it enters the warranty period, which is 12 months.

1. The purchaser shall provide cooperation for the supplier's on-site work.

2. Both parties shall keep confidential all relevant information and materials, and shall not engage in any behavior that harms the interests of the other party for any reason or in any way without the permission of the other party (such as disclosing the other party's information and related technical information to third parties or imitating the other party's products, etc.).

3. The warranty period for the equipment is 12 months from the date of self acceptance (the supplier shall provide free replacement and maintenance warranty services as required by the demander). After receiving the demander's warranty service request, the supplier shall provide feedback within 2 hours and come to the site within 48 hours. Even if the warranty period is exceeded, the supplier shall provide active and preferential services.