Type of Valve

I will take a guess (a WAG):

Triple Offset Torque Seated (TOTS) Butterfly Valve.

Lots of guys will know for sure. I'm right or I'm wrong. Let's see.

I would agree with chaotic, it looks like a remote operated butterfly valve. The heavy duty casing makes me think it is explosion proof and suitable for use in enclosed areas. Explosion proof merely means if it shorts out itself, it will not ignite an explosion if fuel vapors are present.

Drew

No, it's not EEx d. If it were, then the nuts holding the cover down wouldn't be removable with an open-ended spanner. A ring spanner or a socket set would be needed.

It might not even have any electrics in it.

Let me be more specific.

this valve is on a 6" line going into a Test Separator. Over the years it was sand blasted and painted so many times that there are no markings on it at all. It is pneumatically operated with spring return

I'm tempted to say the part on the left side of the valve is a spring return assembly.

Guys,

Maybe I will be wrong but it looks as a ball valve single action spring return

Regards

JP

Based on the size of the valve body I'd have to agree with you JP... ball valve with a single action pneumatic/spring return actuator.

I'm going to have to correct my earlier statement based on one manufacturer's literature. It appears the left side is the pneumatic side (I think the small line going in is the air), the right is the spring return.

see the following for what I'm referring to...

http://www.valve.co.za/pdf_2009/v_a_procontrol/v_a_procontrol_vp_series_pneumatic_scotch_yoke_actuators.pdf

The area looks to be a marine product transfer dock.

I would venture a guess of an emergency return to close product transfer valve.

Either spring, hydraulic, or pneumatic (non-electric) return to close (failsafe) system.

It looks kinda small for a marine transfer header system, but too big for your average marina offloading header.

Upon closer inspection of the image, I see small pilot lines going to the left side of the image. But I don't see anything that makes me think it is a pressure controlled valve. I don't see any wires going to the casing on the left, but that doesn't mean they aren't there. The casing on the right doesn't look like any controller I have used before but there are no marks on the top where a manual handle would go so I don't think this valve is operated manually often (ever).

I think we need more pictures. If you want us to be more accurate with the type and manufacturer we will need pictures of the data-plate or at least manufacturer's marks, country of origin etc.

Drew

Excellent point! I've seen this type of valve before on an ammonia transfer line (although not this large and hence my learning curve). Air pressure to open and should the emergency situations arise, electrical controls dump the air pressure and spring shuts.

There are no markings on this valve due to blasting and painting. I need to fit a DVC and associated hardware onto this valve with position switches so i am desperately trying to find the make/model etc

Photo is not sufficient to understand the valve as you didnt send the complete photo(other side photo)

It is a spring return butterfly type valve.its correct.

But it could be a shutdown valve also.Try to look that if there is any positioner with scale or not.If no then check that if there is any limit switch or not.Check that if pneumatic supply passes through the soleniod to the actuator.

Give me above mentioned information. then only i will tell you the type of valve.To fix the DVC above mentioned informaton is required.

Here is another photo. Spring return correct. Are you sure it is a butterfly valve? It is being used as an SDV, is this to code? The signal for the valve comes directly from the Master control panel pnuematics through a three way versa valve that has a high level switch acting as the pilot on the versa.

The DVC and position switches are being installed as part of a SIL system.

Thanks

get the clear picture of pneumatic assembly....is there any limit switch?

No limit switch. Pull to open versa valve at control panel with a quick exhaust at the valve.

its a emergency shutdown butterfly valve....as per ur detail.

spring return actuator with soleniod and quick opening exhaust.

how do you fix a DVC..its not serving position control at all..as per your description its not a control valve.DVC to be used for position control.

AMO,

Why you need install a DVC?

DVC <----- Will be it to use for PSTV?

Could you get the P&ID for that section, I´m not familiar with marine installation,

What mean SDV?

I´m thinking yet that is a ball valve, lol

Regards

JP