What should be paid attention to when purchasing water meter verification device by quality method

What should be paid attention to when purchasing water meter verification device by quality method

As a shrewd purchaser, the quality method water meter verification device you purchase must be low in price and high in quality.And often low-priced equipment, the quality can not make you feel at ease, high-priced quotes, you worry about too much water.At the same time, you have received quotations from many manufacturers, with high and low prices.You can't tell which equipment is really good quality and the price is very low, so you don't know where to start.Here is a little suggestion for you.You can quote at a low price, and the manufacturer at that price will have material or quality problems, so the price is very low.At the same time, if the highest offer is removed, it may be a middleman or too much water.Leaving the middle, you can choose two or three quality method water meter verification device manufacturers, compare the background, customer reputation, and successful cases, and then make a choice.

Here are a few points to note:

1. Choose a good material

The water meter verification device produced by the quality method water meter verification device uses 304 stainless steel (the price per ton is about 35,000 yuan)

For products of the same specification, such as the 15-50 quality method water meter verification device, the price of a small factory is very low, with a difference of 10,000 to 20,000 yuan.At the same time, it will also indicate the use of 304 stainless steel.Small factories will use 304 stainless steel.Some materials use 304 stainless steel.Most materials use other stainless steels such as carbon steel and 201 stainless steel.(The price of carbon steel is about 8,000 yuan/ton, and the price of 201 stainless steel is about 13,000 yuan/ton).

Savvy buyers can determine whether the manufacturer has used genuine quality 304 stainless steel by calculating the weight of the equipment.

2. Guaranteed quality

The quality of the water meter verification device using the quality method is guaranteed by the use of materials with good performance, and after-sales service is guaranteed.

Small manufacturers use poor performance, low price, and poor quality materials, which are prone to accidents and equipment failures.

For example, the price of a surge tank, small manufacturers will indicate the use of 1 cubic meter, often 0.7 cubic meters.When testing the water meter, the maximum flow value cannot be detected.

The quality method water meter verification device will be manufactured in strict accordance with the national standard specifications of 1 cubic meter or higher, and can detect various flow indicators.I don't know what caliber of equipment you are using. A little personal opinion is for reference only: the main thing is to ensure uniform temperature.Let the unit run for a while to equilibrate the water temperature before starting the test.The graduated cylinder should also be filled and emptied several times to prevent the temperature difference between the graduated cylinder and the water from being too large.If necessary, refer to the temperature correction formula for metal gauges.

3. Good after-sales service

The water meter calibration device is easy to upgrade.For example, the national standard has been adjusted, and the quality method water meter verification device will modify the equipment according to the national standard.The decoration cost is low and the quality is guaranteed.In addition, the equipment basically does not fail.

Small manufacturers have poor transformation capabilities, use materials with poor performance, and have short service life of equipment.Problems with the water meter calibrator cannot be solved, and often no one can be found.See if it's manual or automatic.The general procedure is to clip the water meter to the device.There should be straight pipe sections before and after the water meter, and the length of the straight pipe section should be about 10 times the diameter of the water meter.Then deflate.When deflated, first open the large rotor, but do not exceed the water meter to the maximum flow rate (Q4), and deflate in turn.When the small rotor is opened, it should be opened slowly so as not to damage the rotor or glass.When there are no air bubbles, the water meter can be checked.

The basic steps of testing the water meter: read the water meter, close the bottom valve, open the flow control valve of the rotor, go to the Q3, Q2, Q1 flow points respectively, wait for the water to enter the standard water tank to the designated position, close the flow control valve of the rotor, and read the water meter number Make a relative error with the volume of the standard tank to see if it is qualified.