Like its name, it is special. I don't have the courtesy to own/share the drawing. Would requires some ingenuity and simply logic to think about it, I believe you can.
Give an example and hint: below from left to right: ball - adjusting bush (red arrow) - seat holder (blue arrow). Name can...
Hallo,
Design philosophy of ball valve is that either ball or seat will worn out overtime (after dozens if not hundreds cycles), then it would be logical if seat(s) should be the one that can be 'easily' repaired or replaced. Smaller size and weight shall compared to ball. Thus, fully welded...
hi,
There is a Safety Relief Valve Engineering (PSV) on a different channel. IMO best suited there.
In a nutshell.
Step 1 Operation/Process Engineer end user side provides:
Medium, Pressure (upstream and downstream/back pressure), sizes, Design pressure of 'protected' upstream equipment, etc...
Yes/Yes
API 624 title is 'Type Testing for Rising Stem Valves Equipped with Graphite Packing for Fugitive Emissions' whilst API 641 title 'Type Testing of Quarter-turn valves for Fugitive Emissions'.
It's quite self explanatory. Gate is rising stem and ball is quarter turn.
Rising stem valve's...
Hello,
If the company bound to clean gas act or Brussels Accord or similar (on other parts of the World), then Yes, it should be specified. Control valve would be a tricky one though
Please connect below dots to support the narration:
Leakage path from valve can be from: gland packing...
Hello,
Your questions are quite complex since it covers multiple aspects.
Lets use some baselines:
a. Non-NACE trim (spindle, obturator and seats) might subject for hydrogen embrittlement shall exposed to extended period of time with wet H2S
for example: if spindle of gate valve broken at...
Hi,
Looks like a split body ball valve..
Gearbox suggested it is quarter turn (12 o'clock tag seems O for Open and 9 o'clock tag seems Close marking).
Quarter turn usually ball valve, butterfly valve and Plug valve.
Guessing it was pre 1980's.
Not sure if this is ANSI class or WOG. Won't be...
LittleInch already explain very thoroughly.
Do you have like engineering group or something within your company to discuss this thing, assuming you're working for valve manufacturing company.
Discharge is basically downstream side of the valve, and suction is upstream side of the valve. So flow...
Good day,
I don't know any USA based, but that shouldn't be a problem wrt nowadays communication.
Try CONVAL, German based with worldwide clients. Of course there are many others.
IMHO, valve sizing (software) companies should have hundreds or thousands valves database from different...
Hi,
I see that this post is redundant and might confuse someone.
I’ve provided answer on similar post. If end user requires fire test, then manufacturer shall comply with it.
API 607 with title 'Fire test for Quarter Turn valves and Valves equipped with Nonmetallic seats' specifically made to...
Hello,
your question: The supplier says Butterfly valves with EPDM seats don't require a fire-safe test certificate. Is that true.?
Short answer: This is not entirely correct.
Longer explanation:
Fire test standards which covers elastomeric materials are: ISO 10497, BS 6755-2, API 607 or API...
Hallo,
If the valve design is not subject for design such as e.g. API 600, API 602, FCI 70-2 (control valve) and many others. Then usually it is subject for PED aka body test only (read: 1.5x Maximum Design pressure as per ASME 16.34 (if flange) or PN rating), and not necessarily subject for...
Hello,
Can you share maybe some pictures of the damage, material (metallic) used and flow rate or velocity?
Without those, can only assume either wrong material selection and/or flow accelerate corrosion.
Also, I don't really understand, cmiiw, so Seat is PTFE, Plug is metal and damage...
Intriguing remarks from your comments:
- mostly for used/overhauled valves (ball, gate, globe, butterfly, wellhead equipment, safety valves)
- inside an onshore oil production field
- mostly followed standards are API 6A, API 6D, API 598, API 527, ISO 5208, ASME B16.The problem is that I have...
Maybe more details/background over your inquiry.
Who are you? manufacturer, engineering company, end user or third party?
Which (geographical) region are you referring to?
Which type of valves?
Otherwise AI can answer your question, like below
Quote
The requirement for third-party presence...
