Good Morning,
I have cryogenic valves (stop and control valves)from Hymatic Engineering UK, I need repair kits for this valves.
Does anyone know what happened to the valve division, who took it? What company can have drawings for these valves? Maybe some company still produces these valves...
Dear Friends,
Is the hydrogen content H2 of 2.5 [mol %] in the helium-nitrogen stream dangerous to stainless steel 304 / 304L, seamless piping 1/2 - 1 1/2 '' SCH40S, pressure working ca. 20 barg, temperature range +20 / -165 degC?
Regards,
VIKI
Dear Friends,
Is the hydrogen content H2 of 2.5 [mol %] in the helium-nitrogen stream dangerous to stainless steel 304 / 304L, seamless piping 1/2 - 1 1/2 '' SCH40S, pressure working ca. 20 barg, temperature range +20 / -165 degC?
Regards,
VIKI
Hello,
What is the difference between the bearings series MR (e.g MR1314EB_EL_EX )and series NJ (e.g NJ 314 E ...)? Can I used the bearing series NJ instead series MR for screw compressors? Thank you for help.
Regards,
Viki
Hello,
In the front of the male rotor shaft is roller bearing NU315ET Polyamide Cage, speed ca. 4900 rpm, gear ratio 1.65. Bearing has been damaged several times (blocked) and replaced by new one.
What should be internal clearance for this bearing, normal or C3? And maybe change the bearing...
Hello all,
Cameron ball valves. What does generally differences between type 30, type 31 and type 32?.
Type 31, is it standard trunnion valves soft seal seats with double block and bleed, SPE seat design (self-relieving) + rotating seats (standard API6D)? What is the advantage of these valves...
Hello,
I have cryogenic gate valves OS&Y 6'' Class 300 BW end 70 years from Walworth - Aloyco and Grove International SpA (Patti Messina) / WAGI Italia SpA Milano, for these gate valves I need spare parts .....
I don't know, is it at present Cameron Italy (GROVE) or CRANE or other company?
I may...
Hello,
What is it special oil VD 177967000 Aerzen for screw compressor type VMX and VMY? Is it mineral or synthetic oil, what is kind of base and kinematic viscosity this oil? Do you have MSDS for this oil? Thank you for your help.
Regards,
Viki
Dear Firieds,
What is standard of flanges DIN 2535 PN40..DIN2536 PN63? Is it cast iron? What is the difference between the standard flange DIN 2535 PN40..DIN2536 PN63 and DIN 2635 PN40..DIN2636 PN63? I have standard of flanges DIN 2535 PN40..DIN2536 PN63 at old valves, body CF8M/316SST.
Thank...
Yes, The mark on the body is 316L, but the body looks as the cast steel stainless. This may be ASTM A351 CF3M (316L). Is this causes problem, what is differences in the use for cryogenic?
viki
Dear friends, can you look at the picture of the body valve. Is it cast steel body or forged body of valve?
Thank you for your help.
Best regards,
Viki
http://files.engineering.com/getfile.aspx?folder=874fa592-8e17-400c-8b5c-313e4a2ec93f&file=valve_body01.jpg
ok
medium: nitrogen gas
flow range: min 10 000 normal from 20 000 to 32 000 max 52 000 Nm3/h (control flow).
pressure P1: 0,7 barg.
pressure P2: don't know (no pressure gauge), outlet to the atmosphere through the chimney.
at the normal working, temperature ca. 20 degC.
at the abnormal working...
Hello all,
For control / throttling the flow of gas, what is a better solution : triple or double offset butterfly valve (high performance) ? At the inlet low pressure, high flow, size 18'' - 24'' . What are your opinion?
Thanks a lot
Viki
Liquid nitrogen and liquid natural gas LNG aren't a corrosive, but mercury is dangerous. Valve with flanges made of CF8M is good, but welding is problem. The ferrite content in CF3M and CF8M are similar. Higher impact strength at low temperature has CF3M than CF8M (to - 196 deg C). Both grades...
Hi, all..
I have problem, that supplier offers me a cryogenic ball / gate valves ASME class 300 / 600 (BW welding ends) body / bonnet made of casting CF8M. When I asked them, CF8M, doesn't problem with sensitization (intergranular corrosion, postweld heat treatment) cast stainless steel after...
