Control Valve is Struck Off

1. Check the valve is indeed stuck off and not a disconnected solenoid wire or logic problem.

2. Reroute or shut off the flow to the effected valve (I cannot stress how important this is).

3. Remove the valve and inspect it to find the cause of the sticking (mechanical failure, seal degradation, inadequate maintenance, fouled with solids buildup, etc).

4. Fix problem or replace valve.

Are you a site Process or Maintenance Engineer?

Is this homework? Be honest!

Our friend is either taking a test, or has a new job for which he is not prepared.

Dear all,

what the hell is this? i do not take a test nor do my home work. i m doing initial training in an organization during my training if i have any confisioun i discuss with this site. if you mind it then sory i will not adsk any question next time. ok?

Well, it does look like homework.

If you had bothered to explain briefly why you were asking, I'm sure someone here would overlook your rudeness and help you.

Remember, you are the one who needs help, not us.

Based on all your previous posts (and that this is the first post you have responded in to clarify), it looked like homework.

So my answer in Post #1 was what you were after?

AOA,

dear first of all we check the mA at positioner,then check the pneumatic positioner out put ,if this side clear then given the maximum pneumatic pressure to actuator .

"Struck" or "stuck"?