Wafer Type Concentric Spline Butterfly Valve Marine Valve
General design: API 609
Face-to-face: API 609 and EN 558 1 to 20 series
Flange drilling: ANSI class 125/150, class 300 and DIN PN10/16/25/40 JIS10K/16K
Actuating form: Hand lever, worm gear, electric actuator and pneumatic actuator
Size: DN25 to 1200
Strengths:
1. Midline butterfly valve is compact in structure and light in weight, and easy for assemly and disassembly, and maintenance.
2. The operaturing torque of it is small.
3. It is small in flowing resistance and good in erengy-saving effect, with discharge characteristic approximating inclined straight line.
4. It is featured by reliable sealing, zero leakage with ten thousands of opening and clising times,
5. The valve can be made of various materials, adapted to all kinds of media.
6. They are used in the pipelines and vessels for conveying various corrosive and non-corrosive fluid media in thr engineering systens of water supply generating, petroleum, gas, chemicals, smelting, food, medicine, paper-making, shipping and environmental protection and also for regulating and cutting off the flowing of media.
- Performance Specification
| Nominal Diameter (DN) |
25(1")~600(24") |
25(1")~600(24") |
DN (inch) |
| Nominal Pressure (PN) |
10 |
16 |
BAR
|
| Test Pressure |
Body |
15 |
24 |
| Sealing |
11 |
17.6 |
| Working temperatureºC |
-15ºC~+150ºC |
| Applicable Mediums |
Fresh water, sewage, sea water, air, steam, food, drug, various oil, acid, alkali, salt, etc. |
Note: Applicable temperature and mediums are depending on the materials of different valve seats, bodies, stems and discs, see table 1 and table 2:
Regular Material of the Main Parts (Table 1)
| Body |
Disc |
Stem |
| Name |
Code |
Name |
Code |
Name |
Code |
| Cast Iron |
GG25 |
Electric-plated
DI |
GGG40+Ni |
Stainless Steel |
416/316 |
| Ductile Iron(DI) |
GGG40 |
AL-Bronze |
C954/C958 |
|
431/17-4 |
| AL-Bronze |
C954/C958 |
Stainless Steel |
CF8/CF8M |
|
|
| Stainless Steel |
CF8/CF8M |
Coating DI |
GGG40+Nylon |
|
|
| Carbon Steel |
WCB |
|
|
|
|
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