Interested to Buy Any Domain ? << Click Here >> for more details...
what is the control valve?how many types of control valves
are there
- 6 Answers
- 22813 Views
- Chemin, Hindustan Zinc, I also Faced
- E-Mail Answers
Answer Posted / sam.r
control valve is a final controlling element, to implement
the manipulated variable to regulate the controlled variable
in the process.
there are two types in control valves they are
1)Inherent characteristics
a)quick opening
b)linear
c)equal percentage
in this the the pressure difference is determined by the
valve alone
2)Effective characteristics.
in this type the control valve posses the characteristics
when installed in the field.
| Is This Answer Correct ? | 13 Yes | 1 No |
Post New Answer View All Answers
What is the difference between modbus,fieldbus & profibus
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.
what is exact time to study dcs and plc cources
What is the difference between ff transmitter and non ff transmitter
I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann
Conversions
What you mean by multi stage control vavles?
What is the diffrence between ff tx and non ff tx
Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?
how pressurize drum calibrated ?
I want to apply for the universities in US,but i got the GRE score of (650+300=950)TOEFL 69/120.Is this score sufficient for applying universities please i am married i need to go to US because my husband didn't get H1 yet.please send me suggestion
How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System
What is PDS and PDMS ?
what is the protection system in solar turbine compressor
Questions on flow meters,few questions on HART protocol,
