Is there an industry standard or performance expectation for 2 wire 4-20mA output devices (actuators, positioners) for signal levels below 4mA? For example, many field transmitters incorporate special signal indications outside the 4-20mA interval for alarm levels or diagnostic indications.

I have a question regarding the interchangeability of a pressure control loop setup (pressure element, transmitter, PLC, globe valve) versus a self-contained pressure reducer/regulator.

I'm now working with centrifugal compressor and trying to reduce start up time. During start up compressor is being purged with process gas by sequence control.

I have a subsea gas well with reasonable amount of water content. Tieback distance to the host platform is about 5 miles, and it is an 8" pipeline. Initial calculations show that there'll be slugging.

I have a question about API 600 Standard. I have to issue a Data sheet for Gate Valves 2"-6" (API 600 Standard). If I want a Full port valve, I need to specify this characteristic or all API 600 Gate Valves are Full Port.

When describing allowable leakage, the standard refers to ".01% of rated valve capacity". Rated valve capacity is defined as "the quantity of test fluid that would pass through the valve at rated travel under the stated pressure conditions as defined by the appropriate equations and manufacturers ra

I'm looking for a miniature (has to fit into an enclosure of size 90x35x15mm or 3.54x1.38x0.59in) vacuum pump that should generate a vacuum of 200mBar.