Recent content by stiffler

Hi everyone, I have a question relating to EN ISO 15848. My question is: If I were purchasing valves that meet class B of the above standard, would each individual valve be tested or would the valve design be approved to the standard? Any halp is appreciated. Thanks, stiffler

Dear all, I am looking for some advice please. What I am wanting to know is...are there any ball valve manufacturers who use PTFE body and stem seals on ANSI 600 and above? Services to include: Glycol, Natural gas, Hydrocarbons, Methanol Ambient -46 to +200C teperature range Thanks for any...

Subject completely deviated here but in my view, a quality, well designed floating ball valve does not need any preload. Cheaper manufacturers will squash the seats onto the ball to make up for irregular shaped balls and / or a lack of understanding. In response to the original query, the...

right, ebay it is then

Thanks very much guys, all good suggestions. Very much appreciated.

Hi, I contract in the valve service industry and I was wondering if anyone was aware of anywhere used valve industry equipment, machinery, test rigs etc. can be bought and sold. I have a couple of things such as a trevitest unit that are now surplus to my requirements and it seems like a...

As Gerhardl says, it's impossible to say for sure until all service information is assessed but I see no reason why a globe valve wouldn't work as a shut-off. it's not ideal but if the urgent situation required it, it could be done. To improve positive seating, the valve can be installed in...

Thanks Donf, I will try these 2 companies, I guess they will be able to advise on what exact infomation I need to get from the client. The dead-man-handle thing confuses me still. These valves are all manual so it's not fail-close from a signal, as you say, it must be some kind if spring...

Guys, I am looking at 25mm (1") manual globe valves for use on ammonia. I have to find 40 or so of these valves for a new build project but I don't know where to start. My client mentioned 2 bolt Ammonia flanges - I have no idea what these are. Temperature will be ambient, pressure will be...

Hello Jaffaotc, I have a bit of past experience with sealant injection on gas and hydrocarbons service valves. First of all, I must point out that I haven't used Valtek or Furmanite products for at least 5 years so improvements may have been made to these Sealants that I am unaware of. The...

JohariGregorio, I have to say, I agree with Valvit. If you need to ask the sort of questions that you are, I would suggest that you're taking on something that you are not prepared for. I worked for a valve service company where we overhauled Borsig fully welded valves. It is expensive to do...

Can pilot operated relief valves be tested in-line like conventional spring ones can. I've been looking at methods such as Furmanite's 'Trevitest' for in-line testing but it's un clear to me whether there's a method for testing pilots. Thanks in advance, Matt.

brilliant. Thanks for that.

Is there any difference between a Pressure Safety Valve and a Safety Relief Valve? or are these just 2 names for the same valve? if there are differences, what are they please? Thanks, Matt.

Ah yes, thanks guys. it looks like the Adiabatic expansion route has been explored before. I will check out this past thread and hopefully come up with some answers. now I know its's called Adiabatic expansion I can also look at what wikipedia has to say about it. Thanks again, Matt