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Thank you for the information. I am surprised to not see any recommendations for a gate valve. My thought was for a double offset BFV or a gate valve. However, we are using a plug valve as there have been valves of this type in service that haven't had any problems. thanks again, breaker

Looking for ideas on a valve type. I have to install some valves on my city water intake. 6" steel lines. Its slightly filtered river water which can include debris, both small and medium size. I am thinking HP butterfly valve to get a good seal over knife gate. Any thoughts or experiences? line...

@bcd...I was thinkng of this question just recently myself. My question is, there isn't a regulation temperature point at which a self relieving or by pass system be used to vent the ball caivity? I imagine this could be differnet based upon the media like you mentioned. Some expansion...

pumps....thanks for the obvious advice. I was trying to familiaize myself with the application. Also, I was under the impression these forums for open for discussions which is the reason for the question. I thought it would generate a little conversation and get into some talks that would...

I am little confused. I have a client stating that they need to find a subsea valve that has a max temperture of 350F. Where would the valve see such high temps? Also, the depth is 3000 meters.

I have a customer looking at some valves for a chemical injections skid(MEG). what are the typical piping and valve sizes used on these skids?

Other than the office testing according to API such PRII etc.. What is the inherent difference between a standard high pressure trunnion ball valve and one that is subsea design? This seems broad I know but basically could I use a 316SS trunnion 6000k ball valve for a subsea application?

I have had experience with the stellite surface. Is the application an abrasive media? You would want the ball to be of a harder material. This way the seat is some what softer to allow it to be the replaceable. This wasn't in a ball valve but similar possibly.

thank you to everyone.

Thank you all for the information. The points and discussions are extremely helpful and informative.

We are looking to purchase some valves which need to be fire safe. We are running into the difference between the safe designed valves and the tested. We are aware of the test criteria for API 607 and what it will mean to be tested. But, what is the criterion to call yourself a fire safe...

I am looking at 15k pressure rating. Also, I am pretty sure viton only reaches 400f. The fire test will see over 1100F.

Does anyone have any experience with high temperature o'rings, or if there is such a thing? Looking at a ring that can withstand the API fire testing for a high pressure valve. Any suggestions?

does anyone have experience with High Temperature o'rings? I am talking fire tested rings, so will see 1300F

Java, Ok, I understand. Thanks for the information. Good Luck.

Java, what is the reason for the need of the valve to be plastic?

What class under ASME B16.34 would ball valves with ratings to 15-20k have? I do not see a material in B16.34 that can be rated so high. Does 16.34 take us to 4500 special class then above 11,250psi do other standards then need to be followed? How about an API spec?

What class under ASME B16.34 would ball valves with ratings to 15-20k have? I do not see a material in B16.34 that can be rated so high. Does 16.34 take us to 4500 special class then above 11,250psi do other standards then need to be followed?

What is the general or most common type of 17-4 used in the oil and gas industry, mainly in valve design? 17-4PH or another type.

Any basic ideas as to the difference between specs API 607 and API 6FA? It appears that the testing is the same however the 6FA is strictly for API designed valves and the 607 is for "others". Any ideas?