the HH side mounted density meter flange center distance
1. It can be seen from the structure diagram that the flange center distance does not represent the length (height) of the overall level gauge. The length (height) of the flap for scale indication is also slightly longer than the flange center distance (the extra part is the nameplate and some parts of the top of the flap). Why is the overall length longer than the center distance (liquid level measurement range). Because we can see from the above structure diagram that when the liquid level scale is 0 or 0, (the principle of buoyancy) the upper end of the float should be aligned with the scale 0, then the main steel pipe should also extend the zero-point scale downward to leave the float length. (The length of the float is determined according to the density of the medium). Similarly, the same consideration is given when the liquid level is full scale. Moreover, a blowdown valve must be installed, and the operating space of the blowdown valve should also be considered in the installation space.
2. The visual distance is the liquid level measurement range that can be seen by the eyes. In other words, the visual distance of the HH side-mounted density meter_differential pressure density transmitter is equivalent to the flange center distance or the liquid level measurement range. . Of course, if the user has special needs, it can also be lengthened. That is to say, when there are special requirements, the visual distance (range) can be longer than the flange center distance (the real measurement range on site). For example, the height of the on-site tank is 1 meter, and the required measurement range is 1 meter, then the flange center distance is also 1 meter (of course, it is necessary to consider whether the distance between the bottom of the tank and the ground is enough for the length of the float and the operating space of the drain valve), if this When you need to extend the viewing distance, it can also be done. As long as the length of the main pipe of the HH side-mounted density meter_differential pressure type density transmitter and the length of the scale indicating flap can be lengthened when making the liquid level gauge, the center distance of the flange remains unchanged, that is, the upper end method Flange installation and lower flange installation are still at the top and bottom of the 1-meter tank.
(Of course, the space distance above the top and the distance from the bottom to the ground are still considered here, because some occasions are indoors, especially the space between the top and the roof indoors. And in some occasions, the bottom of the tank and the ground are only one thickness of steel plate The space is basically close to the ground. For example, a HH side-mounted density meter_differential pressure density transmitter ordered by a chemical factory last week, the tank body is 5 meters, but because the bottom of the group is only one steel plate away from the ground, the space is not enough , so the flange center distance can only be 4 meters 4, (vertical side installation) that is to say, the lower flange is still 60 cm away from the bottom of the tank to ensure the length of the float and the space of the drain valve). As long as there is enough head space, the tank body of 1 meter, the range of 1 meter, the flap and the main pipeline can be extended to 1 meter5. In other words, the visible distance of the scale indicating flap has become 1 meter 5.
Advantages of HH side-mounted density meter
Advantages of stainless steel HH side-mounted density meter_differential pressure density transmitter:
1. Good safety: HH side-mounted density meter _ differential pressure density transmitter has high explosion-proof performance, intrinsically safe explosion-proof, safe to use, especially suitable for the measurement of chemical raw materials and flammable liquids. There is no need to open the tank cover during measurement, avoiding the insecurity of manual measurement.
2. High precision: Since the HH side-mounted density meter differential pressure density transmitter works with waveguide pulses, the measured displacement is determined by measuring the time of the initial pulse and the end pulse, so the measurement accuracy is high and the resolution is excellent. At 0.01%FS, this is an accuracy that is difficult to achieve with other sensors.
3. Strong reliability: Because the HH side-mounted density meter differential pressure density transmitter adopts the waveguide principle, there is no mechanical moving part, so there is no friction and no wear. The whole converter is enclosed in a stainless steel tube, and it is non-contact with the measuring medium. The sensor works reliably and has a long service life.
4. HH side-mounted density meter_differential pressure density transmitter is easy to install and maintain: the magnetostrictive level meter is generally installed through the existing nozzle on the top of the tank, especially suitable for underground storage tanks and storage tanks that have been put into operation can be installed without affecting normal production during the installation process.
5. It is convenient for system automation: the secondary instrument of HH side-mounted density meter_differential pressure density transmitter adopts standard output signal, which is convenient for computer to process the signal, easy to realize networking work, and improve the automation degree of the whole measurement system.
