Answer Posted / m.v.ramesh
There are yes and no answers of this query.
correct answer is Yes. Most of the answers are Yes but
Explanation is a bit not clear. Yes offcource valve
positioner has lot of usages and advantages in controling
the valve position.
Answer no 8 is some what clear.
Here is the straight right answer.
"Yes we can use a control valve with out positioner when
bench set of the control valve is matching with the
standard bench set of the valves." ie, valve spring range
is 0.2 kg - 1 kg. where the process fluid is clean, and for
the valve sizes below 1 inch usually.
Where these valves need regular preventive maintanence
(lubricating and changing the packings promptly or else
these valse will give erratic positions).
| Is This Answer Correct ? | 15 Yes | 5 No |
Post New Answer View All Answers
Reason for capillary type dp level transmitter fluctuation
What is the basic difference between Modbus and CAN Open Protocols
What is Droop? What is Step/Gradient Limiter in Turbine Governor control?
Explain the working of an enraf level gauge.
can any one explain in which term we are flow flow is it volumetric r is it mass? and y
what are the values of fuel flow rate in various places in boiler.
What is three element drum level control system why its better than single element?
How to regulate the flow of Air in 4" line, with max flow of 330 nm3/hr and Pressure of 0.5 bar? please suggest the type of instrument required.
on interface level transmitter model(RTG3302-EMERSON) What is threshold valve how can we select correct threshold value T1,T2,T3,T4 When interface water & hydro carbon
What is voltage regulator?
what is insdustrial vibration.who it works. give atleast 2 types of insdustrial vibration
I have completed B.E. Instrumentation & control in 2009. i have 3 year industrial job experience in chemical plant.now, I want to join M.E. in external. so, Plese say easiet way and good institute name.
how works encoder in plc
What is the difference between mmwc and mmwg?
How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?
