Use of metering pumps and anti-freezing measures
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This post was last edited by wuchangjian on 2010-1-26 22:56. What are the precautions regarding the use of metering pumps for preparing catalytic additives? Today, the diaphragm of the large auxiliary pump froze and was damaged. Does anyone have any good measures to prevent freezing and condensation?
Electric heat tracing for insulation; unknown what the medium is
The media are passivators, scale inhibitors, and corrosion inhibitors
First, install a steam heating line for the pump. Does your pump operate on a continuous basis? If so, disconnect the inlet and outlet of the spare pump and dry it with air. If it operates intermittently, please close the inlet and outlet when it’s not in use, and turn on the drain valve on the pump itself to remove the liquid from the pipes. The corrosion-inhibiting pumps in our systems work in this way. They haven’t frozen after all this time, and they are functioning properly.
It depends on the location of the pump; if it is in a pump room, it is important to pay attention to the temperature there in winter – the heating system should be turned on and the doors and windows should be kept closed. If it is outdoors, heating and insulation should be provided; when the pump is not in use for an extended period, the medium inside should be drained and the inlet and outlet valves should be closed tightly!
If the temperature is too low, adding heat tracing is a good option
That’s amazing; I’ve never seen something like this before. What temperature can you achieve there, to the point of freezing and destroying the diaphragm? That one is usually at least F4; it takes some effort to freeze it to death. Hehe! ! There are also those made of stainless steel; even in the event of a leak of ordinary materials or heat absorption, a sudden drop in temperature cannot cause them to get damaged. Study seriously *in Chinese~~~~~~~
Could there be an issue with the choice of membrane? The operating temperature of this membrane is between -10 and 120 degrees Celsius
Diaphragm pumps or metering pumps will suffice; of course, there are other good pumps available as well.
It is important to prevent freezing in winter. http://bbs.hcbbs.com/viewthread.php?tid=589826&highlight=%B6%B3%2B%B1%C3 http://bbs.hcbbs.com/viewthread.php?tid=593959&highlight=%B6%B3%2B%B1%C3
Diaphragm metering pump diaphragms require a low elastic modulus, a high elastic limit, and a high fatigue limit; at the maximum deflection specified in the design, they should be able to withstand no less than 3X10^7 deflection cycles... Materials such as F4, 316SS, or PEEK are available, with F4 being the most commonly used. How low does the temperature need to be for the diaphragm to be damaged by freezing? It’s necessary to check whether there are other reasons... such as problems with the material used or the manufacturing process of the membrane itself... Electric heating is commonly used for insulation in outdoor applications...