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
