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Started By
Message
re: Fire reported at Motiva plant in Convent, LA
Posted on 8/11/16 at 1:22 pm to DownshiftAndFloorIt
Posted on 8/11/16 at 1:22 pm to DownshiftAndFloorIt
quote:
I'm not familiar with that exact unit, but everything always fails to depressurization. Even if the controls are fried, you either loose control air and the valves open, or loose communication and the valves open.
This. Fail open. If you lose air, they open. If you lose electrical signal, they open. The actuator installed should have a spring that mechanically forces the valve to the open position.
Source: I sell valve automation packages for a living.
2
Posted on 8/11/16 at 1:26 pm to ShoeBang
quote:
Source: I sell valve automation packages for a living.
Sounds like they are similar to shutin valves for the oilfield.
Held open pneumatically, loss of air pressure closes them.
Posted on 8/11/16 at 1:32 pm to N2cars
quote:
Sounds like they are similar to shutin valves for the oilfield.
Held open pneumatically, loss of air pressure closes them.
thats what I assumed at first.
Posted on 8/11/16 at 1:33 pm to N2cars
quote:
Sounds like they are similar to shutin valves for the oilfield. Held open pneumatically, loss of air pressure closes them
Sold those to pipelines for years too, midstream work mainly. Some offshore. Now mostly to plants in this area.
Posted on 8/11/16 at 1:34 pm to N2cars
quote:
quote:
Source: I sell valve automation packages for a living.
Sounds like they are similar to shutin valves for the oilfield.
Held open pneumatically, loss of air pressure closes them.
This. Safety valves require a solenoid be energized to allow air to keep the valve open (or closed depending on application). As stated, there are usually spring packages as well. When you cut power or air the valve slams closed (or open).
Of course fail direction depends on what you are protecting against. If it is an inlet or outlet you would want it to fail closed to cut the flow of feed. If it is a vent or relief it would fail open.
Posted on 8/11/16 at 1:35 pm to ShoeBang
Here you go boys. Have at him.
This post was edited on 8/11/16 at 1:38 pm
Posted on 8/11/16 at 1:36 pm to ShoeBang
What's up with all the downvotes we're getting?
Does someone hate valves?
Does someone hate valves?
Posted on 8/11/16 at 1:37 pm to N2cars
Yea, someone here hates accurate information.
Posted on 8/11/16 at 1:40 pm to meauxjeaux2
what a POS
Posted on 8/11/16 at 1:40 pm to meauxjeaux2
Who is that?
Posted on 8/11/16 at 1:41 pm to sec13rowBBseat28
quote:
Who is that?
You don't know Jerrod?
Posted on 8/11/16 at 1:42 pm to Nado Jenkins83
I've got a hundo that says he ain't no ME.
Posted on 8/11/16 at 1:42 pm to terd ferguson
quote:
You don't know Jerrod?
Posted on 8/11/16 at 1:43 pm to terd ferguson
quote:
You don't know Jerrod?
er'body finna no jerrod
Posted on 8/11/16 at 1:48 pm to meauxjeaux2
Well, who the frick is he?
Posted on 8/11/16 at 1:49 pm to DownshiftAndFloorIt
quote:
Well, who the frick is he?
just some shithead saying he hoped everyone died in the fire
Posted on 8/11/16 at 1:49 pm to DownshiftAndFloorIt
Posted on 8/11/16 at 1:49 pm to ShoeBang
Clockwise to close, counter clockwise to open baw
Posted on 8/11/16 at 1:50 pm to ShoeBang
quote:
Source: I sell valve automation packages for a living.
Who you work for baw?
I work for a manufacturer
Posted on 8/11/16 at 1:51 pm to meauxjeaux2
Former Marine?
( all jarheads, notice I said former, not ex)
( all jarheads, notice I said former, not ex
)
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