Hello WillamTz,
I presume when you’re looking for “good” manufacturer, meaning that they will engineer your valve properly and put their best effort in terms of quality as part of their daily work aptitude.
And hopefully solve your previous problem(s) with this new butterfly valve.
There are number of butterfly valve manufacturer who can do that, but for sure they will ask what is the requirement, previous problem(s), material used, P/T rating, flow and is this pure boiler feed water in combination with other corrosive medium, etc.??
And also what do you mean by bulky? Face to face dimension of ball and globe valve is bigger than butterfly valve? Most of the time, yes, but is this part of your constraint?
Weight is also part of your consideration? Can extra piping support to be added?
Problem of valves generally consist of three things: Internal passing (in close position), external leaking and stuck
You mention after several years problem occurred, and steam boiler heating system
First of all what is your valve size and class?
Passing?
What is your leakage criteria? As per ISO 5208/API 598/etc.?
In the previous butterfly valve, did the Disc got eroded? What kind of material applied? Was disc and seat hard faced or laminated? And what type of butterfly valve (zero offset, double offset or triple offset)? Lug type, wafer type or double flange?
And many other parameters should be floored when engaged to manufacturer.
Triple offset butterfly valve was patented by ADAMS in the early 80’s, and until now they still produce a quite good consistent butterfly valve. And between 80’s and now, Vanessa (now Pentair now Emerson) also ok.
But even these guys and others cannot solve the problem with such limited information.
Why butterfly valve? Putting the disc in the flow regime where the medium is abrasive. Of course this is doable and common practice, but it will have lifetime and some effort (read: price) consequences to apply specific material and more. And shall you dont like the (smaller face to face) butterfly valve, it will requires some effort in the future to interchange the piping layout to install another type of valve.
Good luck,
Regards,
MR
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected
