from the gad trubine control system department...moog servo valve operation
How does a MOOG servo valve operate?
Jyshen, You are most welcome....
By Jyshen on 22 April, 2014 - 6:00 am -
Dear CSA, Thanks for your superb informative response. Your passion and sincerity to share your...
from the Department department...Do I Understand PID's?
Just want to see if I understand these things.
A PID controller output depends on the error between the process variable PV and a target value or...
from the inst department...Gulde control valves
Suppliers of GULDE control valves.
By Dipankar Biswas on 17 April, 2014 - 11:41 pm -
> Please let me know the suppliers of GULDE make control valves. We M/s Continental Valves...
from the instrumentation department...I/P positioner and I/p transducer Control valve
Difference between I/P positioner and I/p transducer
Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not...
By oil&gas on 17 April, 2014 - 5:26 am -
hi sir, I had a question why diaphragm is not used in i/p converter? why they using the bellows?...
from the Forum department...Instrumentation cables sizing
Instrumentation cables sizing
By Franco Kew on 16 April, 2014 - 6:03 am -
Dear Ahmed Sami, Your question is incomplete I can say. Cable cross section and hazardous area...
Ahmed Sami, Choosing wire/cable for a particular application is a very involved process. Does...
Why do you sugget 1.5 mm2 cable? Does that follow any standards recommendation or calculations? ...
You Need at least 6x1.5mm (6 core cable)...
By rvsaradhi on 11 April, 2014 - 2:21 pm -
please note that for all your instrument devices you can use 3x1.5sqmm (3 core cable)....
from the INSTRUMENTATION department...UREA FLOW METER
What type of flowmeter can be installed in a Urea duct as a source of FD and ID fan in the duct?
By Billy on 15 April, 2014 - 10:30 pm -
What are you measuring? Just air flow? We use a DP transmitter for our prill tower air ducts....
from the Level Control department...Magnetorestrictive Level Transmitter issues
Extreme vibration and loss of signal on level transmitters
By Sam on 15 April, 2014 - 8:12 am -
Hi Mateus, there is only one instrument when you are working offshore on a FPSO or Platform...
By Mateus on 27 March, 2014 - 4:01 pm -
Hi Sam, I am reading your comments about interface level tech for crude and water + emulsion. ...
from the Forum department...Actuator indication and control
How to obtain indication and control from a Rotork actuator
Other types of actuators use two drive signals: - one signal drives the actuator 'open' - the...
By rvsaradhi on 11 April, 2014 - 2:17 pm -
please provide actuator model number and application...
from the Forum department...Condensate pots and flow measurement
Using condensate pots for flow measurements
1. The purpose of condensate pots in steam flow measurement is to isolate or seal the transmitter...
from the Instrumentation department...communication between siemens PLC S7-400 to DCS Centum CS3000R3
Communication between SIEMENS S7-400 PLC Scalance card to Yokogawa DCS CENTUM CS3000R3
you need to use Siemens CS-3000 module to convert your signal to modbus TCP/IP signal and interface...
By Patrick Lansdorf on 10 April, 2014 - 2:17 am -
Hi, I am guessing that the PLC is a Profibus master... You can use a gateway, such as: ...
from the How hard can it be? department...Migrating Yokogawa Centum 3000 to Centum VP
Migrating a DCS system from Centum 3000 to Centum VP. Can import control drawings easily, or not?
> Please contact your local Yokogawa office or send a request to >...
By Elbert van der Bijl on 10 April, 2014 - 1:04 am -
In CENTUM VP the database of the old project can be imported/converted. You do not need to import...
from the Forum department...Does anyone have electronic copies of GE TILs?
Looking for electronic version of GE TILs No. 1813, 1639, 1619 and 1602
Thanks for the advice - yesterday I have tried to register as a member of the users group to obtain...
Alexander, as the moderator notes the "sharing" of information is a difficult and...
from the Forum department...2oo3D voting
Explain if 1oo2D voting is just similar to 2oo3 voting for ESD system.
Let's start with your requirement of tripping of valve on rise of line pressure beyond high limit....
By W.L. Mostia on 8 April, 2014 - 12:31 pm -
2oo3 voting is a compromise between 1oo2 (most safe) and 2oo2 (most reliable, e.g. fewer spurious...
from the HC900-C70R department...Split Range Control on two valves - HC900-C70R
Split Range Control on two valves - HC900-C70R
The pressure transmitter is the input to an analog input function block. Its analog value is the...
from the Forum department...Honeywell Experion DCS Redundant Analog Output Card Failure...
Honeywell Experion DCS Analog Output Card Failed. Output went to initialization states. Points analog output blocks gone inactive. Action changed for some valves in configuration.
By hatimnazir on 7 April, 2014 - 3:54 am -
Apart from this, the DCS event also shows the following: "IOM (input output module) switch...
from the Over the Cliff department...Siemens S7 programming
Siemens S7 programming
By JC on 6 April, 2014 - 8:10 pm -
I take issue with this assessment. Take your example of C vs Visual Basic. There's a dramatic...
from the Automation List department...Steam flow compensation
What is the exact formula for steam flow compensation?
> Compensated Steam Flow Formula > Qc=Q*[Square Root of...
from the Forum department...Poll about Open Source DCS/SCADA system.
Poll about if the industry is ready to start adopting open source DCS/SCADA systems.
<.... That said, no large company has stepped up to provide support for any of the FOSS SCADA...
from the OSI vs. Aspen department...OSI Pi versus Aspen Info Plus 21
Chemical company with batch processes has to decide if they buy Aspen tech or OSI.
By Tapas Bhattacharyya on 3 April, 2014 - 4:23 am -
The discussion about comparing the selection is very informative. To do better analysis, the areas...
from the Process Automation department...Bailey Infi90 System
Limitations of Bailey Infi90 System.
The only way I know to create a .NBS file is to save from controller, then look for it in the...
from the Applications department...Non-Nuclear Density Meter For Slurry
Does anybody know of a non-nuclear continuous in- line density meter for slurry?
Has anybody tried the DM3 by Sciam Engineering? Any reviews has changed. We have a Salt slurry...
from the Forum department...Series C IO Module in Honeywell DCS failure
Series C IO Module in Honeywell DCS failed
By Jim Delaney on 1 April, 2014 - 7:53 am -
Assuming it isn't something like being baked to death in a panel because the panel's...
from the Museum department...Ancient Fisher control valve
Docs for Fisher valve body EC
from the I&C department...ATEX Ex ic or ATEX Ex nA ?
ATEX Ex ic or ATEX Ex nA ?
Hi, Normally from technical point of view it is required unification of solution. So if you use...
from the Forum department...Final year project using Honeywell DCS
Is there any inbuilt SCADA Software for Honeywell DCS HC900 C30?
Current firmware 4.4 (or higher) HC900 controllers can use flash memory in the controller's CPU for...
A strong conviction that something must be done is the parent of many
-- Daniel Webster