Dimensions & constructral diagram

J21/23W type external thread needle valve(with connecting pipe) constructral diagram
The materials of main parts
Part name |
Stem, Bonnet |
Stem, Disc |
Packing |
J21/3W-16P |
Cr-Ni stainless steel |
Cr-Ni Stainless steel |
PTEF,flexible graphite |
J21/3W-160、J21/3W -40 |
High quality carbon steel |
Cr stainless steel |
Main performance and specifications
Type |
Nominal Pressure(MPa) |
Test pressure PS(MPa) |
Working Pressure(MPa) |
Working temperature (℃) |
applicable medium |
Shell(MPa) |
Sealing(liquid) |
Sealing(gas) |
J21/3W -16 |
1.6 |
2.4 |
1.76 |
0.6 |
1.6 |
P≤540℃ |
Petroleum gas Water,acid,Steam, Oil, etc. |
J21/3W-40P |
4.0 |
6.0 |
4.4 |
0.6 |
4.0 |
J21/3W-160 |
16.0 |
24.0 |
17.6 |
0.6 |
16.0 |
C≤425℃ |
J21/3W -320P |
32.0 |
48.0 |
35.2 |
0.6 |
32.0 |
Main external and connection dimensions(mm)
Nominal diameter DN(mm) |
Dimensions |
?Weight (Kg) |
Do |
D1 |
D2 |
L |
H1 |
H2 |
M |
6 |
65 |
14 |
6 |
140 |
96 |
106 |
20×1.5 |
0.9 |
10 |
80 |
18 |
10 |
160 |
115 |
125 |
24×1.5 |
1.18 |
15 |
100 |
22 |
15 |
180 |
122 |
132 |
30×2 |
2.0 |
20 |
110 |
28 |
18 |
220 |
156 |
166 |
36×2 |
3.5 |
25 |
140 |
33 |
22 |
230 |
169 |
180 |
39×2 |
4.3 |