The valve body, bonnet and disc are the main parts of the valve and are directly subjected to the medium pressure. The materials used must comply with the standard of “pressure and temperature rating of the valve”.
The common materials and standard as below:
NO. | Materials | Pressure | Temperature | Medium | Grades |
| 1 | Gray cast iron | ≤1.0MPa | -10 °C ~ 200 °C | water, steam, air, gas and oil | HT200, HT250, HT300, HT350 |
| 2 | Forgable cast iron | ≤ 2.5MPa | -30 ~ 300 °C | water, steam, air and oil | KTH300-06, KTH330-08, KTH350-10 |
| 3 | Ductile iron | ≤4.0MPa | -30～350°C | water, steam, air and oil | QT400—15, QT450—10, QT500—7 |
| 4 | Acid-resistant high silicon ductile iron | ≤ 0.25MPa | below 120 °C | – | – |
| 5 | Carbon steel | ≤32.0MPa | -30～425°C | water, steam, air, hydrogen, ammonia, nitrogen and petroleum products | WC1, WCB, ZG25 and high quality steel 20, 25, 30 and low alloy structural steel 16Mn. |
| 6 | Copper alloy | ≤ 2.5MPa | -40 ~ 250 °C | water, seawater, oxygen, air, oil and other media | ZGnSn10Zn2 (tin bronze), H62, Hpb59-1 (brass), QAZ19-2, QA19-4 (aluminum bronze). |
| 7 | High temperature copper | ≤17.0MPA | ≤570°C | steam and petroleum products | ZGCr5Mo, 1Cr5M0, ZG20CrMoV, ZG15Gr1Mo1V, 12CrMoV, WC6, WC9 and other grades. |
| 8 | Low temperature steel | ≤ 6.4Mpa | ≥ -196 ° C | ethylene, propylene, liquid natural gas, liquid nitrogen and other media | ZG1Cr18Ni9 0Cr18Ni9 1Cr18Ni9Ti ZG0Cr18Ni9 |
| 9 | Stainless acid resistant steel | ≤ 6.4Mpa | ≤ 200 ° C | Nitrite acid, acetic acid and other media | ZG0Cr18Ni9Ti ZG0Cr18Ni10 ZG0Cr18Ni12Mo2Ti ZG1Cr18Ni12Mo2Ti |
My partner and I stumbled over here by a different website and thought I might check things
out. I like what I see so now i am following you.
Look forward to looking into your web page yet again.
This piece of writing presents clear idea for the new people
of blogging, that genuinely how to do blogging and site-building.
0mniartist asmr
Hi, I do think this is a great website. I stumbledupon it 😉 I will come
back yet again since i have saved as a favorite it.
Money and freedom is the best way to change, may you be rich and continue to guide other
people. asmr 0mniartist
Very rapidly this website will be famous among all blogging
users, due to it’s good articles
Do you have a spam issue on this site; I also am a blogger, and I was curious about your situation; we have created some nice practices and
we are looking to swap solutions with others, why not shoot me an e-mail if interested.
0mniartist asmr
If you want to get much from this post then you
have to apply such strategies to your won website. 0mniartist asmr
Excellent beat ! I wish to apprentice while you amend your site,
how can i subscribe for a blog web site? The account aided me a acceptable deal.
I had been a little bit acquainted of this your broadcast provided bright clear idea asmr 0mniartist
Hey there I am so happy I found your weblog, I really found you by error,
while I was looking on Askjeeve for something
else, Nonetheless I am here now and would just like to say cheers for a incredible post and a all round interesting blog (I also
love the theme/design), I don’t have time to read through it all at
the minute but I have bookmarked it and also added in your
RSS feeds, so when I have time I will be back to read a
great deal more, Please do keep up the awesome
b. asmr 0mniartist
I am really pleased to glance at this blog posts which carries tons of helpful facts, thanks for providing these
statistics. 0mniartist asmr
It’s in reality a nice and helpful piece of information. I’m glad that you just shared this useful information with us. Please keep us up to date like this. Thanks for sharing.
I visited multiple web pages but the audio feature for audio songs present at this site is genuinely fabulous.
Thanks , I’ve recently been searching for information approximately
this subject for a while and yours is the greatest I have discovered so far.
However, what about the bottom line? Are you sure in regards to
the supply?
Thank you a lot for sharing this with all people you really understand what
you are talking approximately! Bookmarked. Kindly also discuss with my site =).
We may have a hyperlink change agreement among us
Write more, thats all I have to say. Literally, it seems as though you relied on the video to
make your point. You obviously know what youre talking about, why waste your intelligence on just posting videos to your weblog when you could be giving us something informative
to read?
Hi there, I found your website via Google while looking for a related topic, your website came up, it looks good. I have bookmarked it in my google bookmarks.
chloroquine phosphate medicine https://aralenchloroquinex.com/# heart rate watch walmart
I have learn some just right stuff here. Certainly price bookmarking for revisiting.
I wonder how a lot attempt you put to create such a great informative website.
What’s up colleagues, pleasant article and nice arguments commented
here, I am actually enjoying by these.