| Product
Description> Control Valve 1 2
3 4 5
6
4¡¢Code List of Sealing Face and Lining
Material of the Valve Base
| Sealing Face or Lining Material of Valve Base |
Code |
Sealing Face or Lining Material of Valve Base |
Code |
| Copper Alloy |
T |
Nitrided Steel |
D |
| Rubber |
X |
Borided Steel |
P |
| Nylon Plastic |
N |
Hard Alloy |
Y |
| Alloy steel, anti-acid or stainless
steel |
H |
Rubber Lined |
J |
| Tin-base Bearing Alloy£¨Babbit Alloy £© |
B |
Lead Lined |
Q |
Note£º¢Ù Sealing face material processed directly
from valve body coded as¡°W¡±.
¢Ú When sealing face materials of valve base and flap£¨flashboard£©are
different, use codes of material code of low rigidity to show.
5¡¢Code List of Valve Material
| Valve Body Material |
Code |
Valve Body Material |
Code |
| Grey Cast Iron |
H |
Carbon Steel |
C |
| Ductalloy |
Q |
Chrome Molybdenum Alloy Steel |
I |
| Chrome-Nickel-Titanium Steel |
P |
Chrome-Molybdenum-Vanadium Alloy Steel |
V |
Note£ºFor PN¡Ü1.6MPa grey cast iron valve body and
PN¡Ü2.5MPa cabon steel valve, code omitted.
II Lectotype of Control Valve
In lectotype of control valve, determination
of nominal diameter is the main content. Its value is determined
by the value of flow coefficient Cv. In engineering calculation,
in order to select size of control valve reasonably, Cv value should
be calculated correctly, or it will cause bad control performance
or poor economic effects and disability of normal operation. This
manual records calculation formula of Cv value, which simplifies
selection of nominal diameter of the valve. Secondly, determine
of connection manner of the valve. And thirdly, determine type of
executive framework. And then referring to model coding method,
determine model of the control valve. For more please consult ordering
notice.
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