Hi,
As stated in Article 250 of NFPA 70, different types of earthing (intrinsically safe, instrument earth(non IS) and protective earth) shall be connected together (apparently) at one point.
But I didn't find any solution to avoid one earth current or voltage, affecting other earthing system in...
Hi,
I have a question about choosing proper explosion protection type for JB containing ONLY TERMINALS related to some Exd instrument (might be either solenoid valves or free-contact digital signals) which hope you may help.
If we need to install this junction box in Zone1 or Zone2 and...
Hi.
Overpressure protection of pressure gauges are 1.3 times of gauge range in general and overpressure protector (gauge saver) will be used for cases where process design pressure is higher than 1.3 times of gauge range.
But what if a diaphragm seal (either threaded or flanged) is required...
Hi,
When we call a cable "LSZH" or low smoke zero halogen, which layer(s) shall have such specification? Is it just for jacketing or insulation and other layers shall have this specification? Can a LSZH insulated cable with PVC jacketing pass the requirements of IEC 61034?
I know that IEC 61034...
Hi,
Would you please let me know what parameter in PSV sizing (both API and ASME SEC VIII) output shows that a valve could suffer from chattering? What's the reference and acceptable criteria? Is it somehow related to capacity exceed?
Thanks
Hi,
We want to use two level transmitters with different principle on a drum and it's been decided to use non-contact radar and ultrasonic level transmitters.
I know that there are other alternatives like dp and displacer but the question is that "Does electromagnetic wave of radar level...
