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Control valve IDC
- Er.piping
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11 years 3 months ago - 11 years 3 months ago #8261 by Er.piping
Control valve IDC was created by Er.piping
I would like to know what a Piping designer should check in control valve vendor drawing
other than size, face to face dimensions and rating.
Something related to valve actuator orientation..? It is necessary to provide prior information to valve vendor about actuator orientation w.r.t. layout access/operating way.
other than size, face to face dimensions and rating.
Something related to valve actuator orientation..? It is necessary to provide prior information to valve vendor about actuator orientation w.r.t. layout access/operating way.
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- Jop
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11 years 3 months ago - 11 years 3 months ago #6729 by Jop
Do it once and Do it Right
Replied by Jop on topic Re: Control valve IDC
Er-piping,
I will make these recommendations:
1. Check and be sure you have all the dimensions for all purchased items. This includes everything related to a Control Valves.
2. Try to always accept a vendors standard pattern. Base your design on their standard pattern. When you start asking for something different or something special, the vendor has the right to charge more and there is the risk that they will not do what you want.
3. When necessary (and I mean only when necessary) it is right proper to explore what alternates they can offer and negotiate for what solves your problem. Get it in writing.
I will make these recommendations:
1. Check and be sure you have all the dimensions for all purchased items. This includes everything related to a Control Valves.
2. Try to always accept a vendors standard pattern. Base your design on their standard pattern. When you start asking for something different or something special, the vendor has the right to charge more and there is the risk that they will not do what you want.
3. When necessary (and I mean only when necessary) it is right proper to explore what alternates they can offer and negotiate for what solves your problem. Get it in writing.
Do it once and Do it Right
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- Er.piping
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11 years 3 months ago - 11 years 3 months ago #6727 by Er.piping
Replied by Er.piping on topic Re: Control valve IDC
Thanks for the reply jop, I am working on a project and we have just received vendor drawings for control valve(Globe type). When i checked drawing with respect to flow direction in 3 D model, i found that in some cases we can not follow the standard pattern provided by vendor. we will have to change the actuator orientation in order to bring the actuator positioner/ dialer in visible area (access way). Since we have done with 90% model review, lines with control valve can not be rerouted at this stage to bring the positioner /dialer in access way.
So the question is, is it mandatory to convey this variation to the valve vendor or it can be done at site without much hassle.
The model is Valtek Mark One Linear Control Valve by flowserve.
So the question is, is it mandatory to convey this variation to the valve vendor or it can be done at site without much hassle.
The model is Valtek Mark One Linear Control Valve by flowserve.
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11 years 3 months ago - 11 years 3 months ago #6731 by Jop
Do it once and Do it Right
Replied by Jop on topic Re: Control valve IDC
This is the image I found for your valve ( www.flowserve.com/Products/Valve ... alve,en_US
) click on the small picture to enlarge it.
Now I think I understand your problem and your comments.
These valves appear to have a four-bolt pattern on the bonnet. The bolts could be removed and the top-works rotated to be viewed from the other side. However, a big issue here is the product Warranty.
I suggest you contact the Flowserve representative and ask if it is better to:
a). have their factory rotate the top-works on specific valves?
or
b). have the field rotate the top-works on specific valves?
If "b" is approved then insure that the Warranty remains in effect
Now I think I understand your problem and your comments.
These valves appear to have a four-bolt pattern on the bonnet. The bolts could be removed and the top-works rotated to be viewed from the other side. However, a big issue here is the product Warranty.
I suggest you contact the Flowserve representative and ask if it is better to:
a). have their factory rotate the top-works on specific valves?
or
b). have the field rotate the top-works on specific valves?
If "b" is approved then insure that the Warranty remains in effect
Do it once and Do it Right
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- 11echo
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11 years 3 months ago - 11 years 3 months ago #6732 by 11echo
Replied by 11echo on topic Re: Control valve IDC
I have a military background, I was tough to be very aware of the "chain of command", as a piping designer you should be too! It’s NOT the job of a designer to “officially†call on vendors to determine the capabilities of any valving (or other items) that have been spec’d out by the material engineer. I would suggest the ONLY thing a designer should do when they see a potential problem is to raise the “red flag†on this to his immediate superior(s) and let them do their job …to support the designers they supervise. It could be that that info is already known and all you have to do is ask, and it would be explained to you. OR the powers that be could say …â€OK we don’t know that will you call and let us know what the vendor saysâ€? ...Bottom line everybody in the engineering dept. (engineers down to designers) need to be aware of the issue and the answer, but it’s not the job of the designer to do that, unless told to! …My $0.02
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- Er.piping
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11 years 3 months ago - 11 years 3 months ago #6733 by Er.piping
Replied by Er.piping on topic Re: Control valve IDC
Thanks for the reply 11echo, Actually i was curious to know weather the top works of valve can be changed at site or not and
thanks to Mr. Jop for the clarification. Now i will ask my Lead Piping eng. to contact valve vendor for this deviation.
thanks to Mr. Jop for the clarification. Now i will ask my Lead Piping eng. to contact valve vendor for this deviation.
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