In a situation where the valve size, class and trim are the same why would I choose an expanding over a slab. Not talking about metal seated. when would you use a 600# expanding gate over a 600# slab gate, let's say both were PEEK seated for high temp.
I have assumed the expanding gate's...
I just found out there will be some kind of check valve and then a blind valve this gate valve which is 14" diameter. I would use a different valve but the users design calls for a API 600 gate. The valve will be closed but not at a low enough temp for the gas to remain liquid.
Hi,
I have an engineer asking for large diameter 600# class CF8M API 600 gate valve. Service is Butane or Propane at -200 degrees. Valve will be operated annually during shutdown at which time the pipe would be drained downstream and removed thus exposing the downstream seat while upstream is...
There is a huge problem with the general understanding of the difference and a mistake on many end users parts to request DBB when what they really need is DIB. Here's a decent video with explanation: http://www.youtube.com/watch?v=JqbaU13cBHk
BTW I am not a shill for this company. It's just a...
Thanks.
In oil and gas Devlon is standard as it is the most cost effective material to handle a wide temperature range in pressures engountered over 900. I think the customer doesn't really know what he wants. So aside from explaining to him what he needs I'd like to know if there is a possible...
A customer of mine wants some large bore API 6D slab gates, media is corrosive brackish water. The customer absolutely insists on RTFE seat inserts. Usually a 900# valve would come with Devlon seats, with PEEK being a more expensive alternative for the highest temperatures.
For whatever reason...
I found this as well: http://www.nace.org/cstm/Store/Product.aspx?id=8528b695-9e9c-40b2-88c1-4857cb42643e
Leaning towards the 316 after reading but very much appreciate your answer to above if you could.
great info, thanks!
BUT, I need to know if there are advantages with the 316 or with the 17-4. I'm a salesman but want to sell them the best product, not steer them towards what I can unload quickest. Currently we stock the 316 stems after a major end user required it over our previous standard...
Hi fellas,
I have customers telling their slab pipeline gate valves must have 17-4PH stems insisting they perform far better than 316 stainless in environments where Hydrogen embrittlement can be an issue. I am not so sure that is the case and not looking to spend the extra money on stock when...
Thanks. I am very familiar with "Bubba Engineering" and now I have a term for it.
"We need 5x more expensive trunnions instead of these gates cuz it's less work operating them. Err I mean cuz these gates is always broke"
I'm trying to get a better understanding of the valve market for this type of drilling and recovery. Initially I assumed it would be alot of the same valves used in SAGD or steam injection but obviously there's no steam. Also curious what are the main materials and API trims for that service...
I have alot of experience testing API 600 gate valves and in that case even with hard seats the low pressure air test is more difficult to pass. Small bubbles will more easily escape through scratches or poorly seated valves revealing flaws
What is the proper procedure for performing API 598 low pressure (80 psi) on a gate valve using a test bench, the type that can turn the valve from vertical to horizontal for air test purpose. I've seen it done 2 ways
Example for a 6" 150# API 600
1. The valve is half open and clamped only on...
