Multi-standard Wafer Type Marine Concentric Butterfly Valve with Full Stem
Concentric Wafer Type Spline Full Stem Butterfly Valve for Marine
Industrial Use
The butterfly valves are widely used in piping of chemical, food, medicine, paper making, water and electricity, shipbuilding, water supply and drainage, metallurgy and energy systems, and is available for regulating and closure devices in a variety of corrosive, non - corrosive gas, liquid, semi-liquid and solid powder pipelines and containers.
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 |
|
|
|
|
| Materials list |
| Item |
Part name |
Materials |
| 1 |
Clamping ring |
Zine plated steel / Stainless steel |
| 2 |
O-Ring |
EPDM / NBR / Neoprene / Viton |
| 3 |
Bushing |
PTFE / Lubricated bronze |
| 4 |
Stem |
Zine plated steel / Stainless steel |
| 5 |
Body |
Cast iron / Ductile iron / Stainless steel |
| 6 |
Disc |
Ductile iron(nickel plated) / Stainless steel / AL-Bronze |
| 7 |
Seat |
EPDM / NBR / Neoprene / Viton |
Audited Supplier 
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