Who can help me?
Look at the following formulas
v = (354 * Q)/ DN^2 then Q = (v * DN^2) / 354
t = (5157 * Q ) / (DN^2 * dP)
Added those formulas together i get;
t = (14.56 * v)/ dP
For liquids v is aprrox. 5m/s
So the valve size is not a factor in closing time, only pressure?!? So the...
Hello to you all,
I know the dimensions for flat head, 'double d'. I use standard ISO EN 5211. But what can i use for machining 'single' flat head?
Is just the same as ISO EN 5211 and only machine one side at the stem / shaft?
Who can help?
Best Regards,
Mrctchlr
My question:
I need to registrate opening- and closing times according to EN161. Can i do it without appling a working pressure to the valve? In other words, can i test it 'dry'.
many thank in forward!
anegri,
The packing set was something i remebered from a seminar in 2005. It is BURGMANN for sure.
I looked it up.
T= 400°C, 40 bar, 1000cycles, 9650 T2
Set containing:
2 endrings made of graphite thread
2 rings made of pressed graphite
1 middle ring made of fiberglass with a special...
Use certified gland packings
for example, tested in Stuttgart (VDI/VDE2440 / EN15848);
40 bar, 200°C, 1000 cycles - Burgermann 9650 T1
Even beter is gland packing set Burgermann 9650 T2 or T3
(9650 T3, 40 bar, 400°C, 1000 cycles)
Maybe you can use this info!
Also look into gasket materials. Garlock tandem spiral wound gaskets. The are specially used fire safe applications
See the attachment
http://files.engineering.com/getfile.aspx?folder=38c02e73-c330-4bb1-beb3-3f13a469af4a&file=GMG%201-3%20TANDEM%20SEAL.pdf
Dear all,
I am looking for a cheap limitswich box. A box with two mechanical V3 SPDT switches. The swichbox has to be in accordance with VDI/VDE3845.
Annual need about 600 pieces.
All help is appreciated!
Many thanks!
MT
Firmino,
My experience is SwRI is best choice. One test according to API607 will cost about $3000,- Score is 3 times more expensive. The only thing i had to add was the transport costs, but still cheaper. SwRI is a certified institute and ABS will except the report without witnessing the actual...
My questions for you are;
What is the design life for a part-turn pneumatic actuator operating butterfly valves?. What is a endurance test for pneumatic actuators containg? What is the method?
Many manufacturer's of pneumatic actuators mention X cycles related to torque, but how have they been...
Dear All,
Who can name me some institutes or laboratoria that perform API607 or BS6755-2 valve tests.
Preferred are the one's in Europe or even more Benelux.
Thank you very much!
Regards,
MT
Dear All,
Every information about using siliconrubber in butterfly valves is welcom. Especially, the issue max. temperature
Thank you all in forward!
Regards,
MT
Hopefully this will help you any furher,
Design: EN 593
Flange connection: ISO 7005
F to F: ISO 5752, EN 558
Marking: EN 19
Topflange: ISO 5211
Testing: ISO 5208, EN 12266, EN 1074
Definitions of valve parts see EN 736
Regards,
MT
To whown it concerns,
HTMS (High Tech Metal Seals) is a supplier of
metal O-rings and C-rings in materials like Inconell, etc.
http://www.htms.be/products.htm
Regards,
MT
dear all,
"Cerified firesafe by Llyods to DOT Rule 54 App. D for use in fire water mains offshore and marine installations".
Who can tell me more about the DOT Rule 54 app. D. What does it contain or require?
In those mentionned installations, what is the most common seat design? PTFE with...
