QFF3 three-valve needle valve Overview
QFF3 three-valve needle valve by the high and low pressure valves and balance valve integral and supporting the use of differential pressure transmitter, its role is to differential pressure transmitter positive and negative measuring room and Pressure points turn on or off, or positive and negative pressure measurement chamber open and conduction. Pressure, pressure points directly connected with the steel pipe, the connection using welding, other connections can be used.
QFF3 three-valve needle valve main components and materials
|
Part Name |
Body |
Valve stem |
Valve base |
filler |
Packing valve cover |
Handwheel |
|
QFF3 160 DN3-50 |
Carbon steel |
Chrome stainless steel |
PTFE, flexible graphite |
Carbon steel |
High-quality carbon steel |
|
|
QFF3 320P DN3-50 |
Chrome nickel stainless steel |
Chrome stainless steel |
Chrome nickel stainless steel |
stainless steel |
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QFF3 three-valve needle valve main performance specifications
|
model |
Nominal pressure (MPa) |
Test pressure (MPa) |
Working pressure (MPa) |
Working temperature (℃) |
Suitable media |
||
|
Housing (MPa) |
Sealed (liquid) |
Seal (gas) |
|||||
|
QFF3 320 DN3-50 |
32.0 |
48.0 |
35.2 |
0.6 |
32.0 |
P ≦ 540 ° C |
Liquefied petroleum gas water, acid, steam, oil and so on |
|
C ≤ 425 ° C |
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Main appearance and connection dimensions
|
model |
Nominal diameter (mm) |
size |
Weight (Kg) |
|||||
|
L1 |
D1 |
Do |
H |
H1 |
L2 |
|||
|
QFF3 320
|
DN3-50 |
200 |
14 |
65 |
234 |
260 |
54 |
3.8 |
