Applications
The valve is a pilot operated piston type and suit to install in the steam lines
with the high capacity of flow, such as industrial production facility
and building facility.
Features
● It is performed and controlled constantly by adopting piston guide
construction and specia seal ring.
● Possible to install in a line for wide range of pressure and capacity.
● Easy pressure adjustment by manual handle with automatic lock mechanism.
● Compact design.
Materials of main parts
Technical specification
| Item |
Parameter |
| Resistance pressure (MPa) |
1.6 |
2.5 |
4 |
| Shell test pressure (MPa) |
2.4 |
3.75 |
6 |
| Seal test pressure (MPa) |
1.6 |
2.5 |
4 |
| Max. inlet pressrure (MPa) |
1.6 |
2.5 |
4 |
| Outlet pressure range (MPa) |
0.04-1.0 |
0.05-1.6 |
0.08-2.5 |
| Pressure characteristics derivation (MPa) |
GB 12246～1989 |
| Flow characteristics derivation (MPa) |
GB 12246～1989 |
| Leakage (ml/min) |
GB 12245～1989 |
| Min. pressure differential (MPa) |
0.07 |
0.1 |
0.15 |
| Max. reducing rate |
20:01 |
| Type of connection |
Flanged RF FM RJ |
Dimension
|
DN
|
L
|
H
|
H1
|
|
1.6/2.5MPa
|
4.0 MPa
|
|
15
|
160
|
180
|
265
|
85
|
|
20
|
160
|
180
|
265
|
85
|
|
25
|
180
|
200
|
280
|
95
|
|
32
|
200
|
220
|
280
|
95
|
|
40
|
220
|
240
|
290
|
105
|
|
50
|
250
|
270
|
300
|
130
|
|
65
|
280
|
300
|
315
|
145
|
|
80
|
310
|
330
|
330
|
170
|
|
100
|
350
|
380
|
405
|
200
|
|
125
|
400
|
450
|
450
|
225
|
|
150
|
450
|
500
|
485
|
265
|
|
200
|
500
|
550
|
570
|
290
|
|
250
|
650
|
640
|
325
|
|
300
|
800
|
740
|
360
|
|
350
|
850
|
810
|
395
|
|
400
|
900
|
950
|
430
|
|
500
|
950
|
1080
|
500
|
| Parts |
Material |
| Body & Cover |
WCB |
| Seat & Disc & stem |
2Cr13 |
| Piston |
aluminum-iron bronze |
| Spring of main valve |
50CrVA |
| Spring of pilot valve |
51CrVA |
| Diaphragm |
1Cr18Ni9 |
| Adjusting spring |
60Si2Mn |
| Piston ring |
Contrapositional polyphenylene |
Flow coefficient (Cv)
|
Orifice size (mm)
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
250
|
300
|
350
|
400
|
500
|
|
Cv
|
24
|
30
|
50
|
85
|
130
|
190
|
300
|
480
|
680
|
925
|
1150
|
1900
|
|
