Transmitter three-valve assembly
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EJA and Rosemount transmitters are claimed to be capable of withstanding pressure in one direction. I looked it up on Baidu. 1. Is it possible to do without a three-valve assembly? 2. Under what circumstances can it be omitted?
Using a valve assembly makes maintenance much easier!
Differential pressure transmitters are generally equipped with overpressure protection devices. Nevertheless, it is best to avoid overpressure when using them, as it not only violates operating procedures but also poses a risk of damage.
Pressure transmitters of any manufacturer can be subjected to pressure in one direction, with only varying degrees of pressure applied. The three-valve assembly is mainly used to check the transmitter zero point.
I don’t understand; what is the direct relationship between unidirectional compression and the three-valve assembly?
Under normal circumstances, a three-valve assembly is still essential; it allows for the adjustment of the transmitter’s zero point, and it also facilitates daily maintenance tasks such as replacing the transmitter or performing cleaning； If the medium being measured is very clean, a maintenance-free system does not require a three-valve assembly.
1. Is it possible to do without a three-valve assembly? 2. Under what circumstances can it be omitted? The three-valve assembly is mainly used for sewage discharge and calibration, and is required under normal operating conditions. However, in some cases, for transmitters connected to hydrogen and oxygen on either end, a three-valve assembly is definitely not suitable, as it would be extremely dangerous to allow the gases to mix. For maintenance purposes, it is necessary to use the stop valves on the pressure lead lines to disconnect the system; in such situations, a three-valve assembly is not required. Under normal circumstances, the transmitter is included as standard, and it doesn’t cost much; we usually ask the manufacturer to include it
When the media on the high-pressure and low-pressure sides are different and cannot be mixed. The three-valve assembly cannot be used