Interested to Buy Any Domain ? << Click Here >> for more details...
what is the meaning of reverse action and forward action of
control valve...
- 9 Answers
- 34776 Views
- Honeywell, Yokogawa, I also Faced
- E-Mail Answers
Answer Posted / www.islamqa.com
For linear motion valves
Direct acting valve:
====================
valve opens when stem is drawn out of the body
Reverse acting valve:
=====================
valve closes when stem in pushed into the body
reference:
Lessons in industrial instrumentation - version 4 - page:713
Regards,
Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
CELL.: 00 2 0121367310
| Is This Answer Correct ? | 6 Yes | 9 No |
Post New Answer View All Answers
any body please send me the old question papers of ongc test.
Decibel.
What is the diffrence between digital signal processing and discrete signal processing?
Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com
what is function of switch, and how is it work, explain with difination
Why mmwc unit is used?
2. What is ultrasonic flowmeter?
I WANT SECURITY PAPER MILL, HOSHANGABAD TEST PAPER.KINDLY SEND TO MY MAIL ID
How many types of sensor
The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?
Can any body help to get Rsemulator 5000 free from internet if possible then give me any link or any help .
what is the process to make control schematic ?
can u briefly explain aboutan aryton shunt multirange DC ammeter?
how we are selecting instuments by differentiating certain instruments in 4 to 20 ma range and certain in 1 to 5 v dc
what is isloted barrier how it works and what are the main purpose.how it make safe area.
