The calibration cylinder is usually used to calculate the flow rate in very small capacity pumps. This cylinder is a graduated container and the body material is usually made of Pyrex, PVC and stainless steel. Another application of the calibration pot is to use it in intermittent and reciprocating flow pumps. In these pumps, if a flow meter is used, there are certain complications and there is always a problem with the accuracy of the flow meter, so it is better to use a calibration cylinder.
Installing the calibration cylinder in the chemical injection package
In a package, it is usually necessary to install a calibration cylinder before the dosing pump. A ball valve should also be installed below it so that the calibration cylinder can be removed from the package whenever necessary. A ball valve is also required on the main line of the package, before the calibration pot, so that we can close it and open the cylinder valve during testing.
Important parameters in the design of calibration cylinders
Transparent cylinder
In the design of transparent cylinders, Pyrex is usually used, which is highly resistant to impact and heat. All glasses also have good resistance to corrosion. Although polymers are highly resistant to corrosion, they lose their transparency in contact with acid.
Calibration cylinder dimensions
One of the important points in the design is its shape, that is, the ratio of length to diameter. The larger the diameter, the shorter the cylinder length (within a reasonable range) and the lower the cost, but it should be noted that the accuracy of the cylinder degree readings also decreases. For accurate readings, it is necessary to go for a calibration pot with a higher height, which of course will be more fragile and also more expensive.
Floor design
One of the important points in designing cylinder heads is calculating the required thickness and also the proper placement of the O-ring or gasket. If the thickness is less than the appropriate limit, especially in polymer heads, curvature will occur and leakage will occur. Also, if the proper placement of the gasket is not considered, the glass will break during installation.
Bolts
We must consider various parameters in the design of bolts, including the number of bolts, bolt type, and bolt thread number.
Advantages of using a calibration cylinder
- Use in non-uniform reciprocating pump flows
- Checking pump performance during breakdowns and repairs without opening or removing it from the package
- Use as a dosing pump suction flow equalizer
Calibration cylinder price (calibration pot)
In general, the price of a calibration pot made of PVC material in Iran starts from about 6 million Tomans in small sizes.
The factors affecting the price of a calibration cylinder (calibration pot) are as follows:
- Material of the graduated part
- Double-decker
- Standard design pressure
- Container volume
- Type of connections and fittings
Calibration cylinder price list
Mahar Fan Abzar Company, considering the calibration pot manufacturer, and extensive sales to factories and packagers, has placed a price list on the site for the convenience of our dear ones, which can be accessed at this link . On this page, the price update date is also mentioned.
You can click here to read more.
Types of calibration cylinders
Calibration cylinders are classified according to the following:
- Gender
- Size
- Charging type
Types of calibration pots based on gender
Important factors in selecting the material of the calibration cylinder are as follows:
- Fluid Corrosion
- Primary tank working pressure
- Fluid temperature
- Ambient temperature
- Fluid viscosity
Selection of calibration cylinder material:
Usually, for long-term readability of the degrees, we avoid choosing plexiglass and go for Pyrex for the cylinder. Also, instead of labeling and printing, we go for laser-printed calibration cylinder housing.
When selecting the material for the end parts of the calibration pot, it is necessary to take corrosion seriously. However, depending on the location, all common polymer materials will usually be suitable.
Types of calibration pots based on charging type
If gravity charging is not effective, we will be forced to use suction or vacuum charging, which comes in manual, electric, and pneumatic varieties.
Where does the difference in price of calibration cylinders from different companies come from?
In general, there are several parameters that vary in the calibration pot that are not given much attention by some employers. One of these parameters is the material of glass or talc, some suppliers produce with plexiglass material, which has a major impact on the price and lifespan of the calibration cylinder. Another variable is the number and material of the retaining rods. Also, the material of the O-ring and its compatibility with the fluid are important.